CN106818769B

CN106818769B - Bactericidal composition and application thereof

Info

Publication number: CN106818769B
Application number: CN201710043527.6A
Authority: CN
Inventors: 古越; 李翔; 陈熙
Original assignee: Sichuan Lier Crop Science Co Ltd
Current assignee: Sichuan Lier Crop Science Co Ltd
Priority date: 2015-01-08
Filing date: 2015-06-11
Publication date: 2020-05-22
Anticipated expiration: 2035-06-11
Also published as: CN106234408B; CN106818769A; CN111096325B; CN104957147A; CN106234408A; CN111096325A; CN104957157A; CN104957157B; CN104957147B

Abstract

The invention discloses a sterilization composition and application thereof, and relates to the technical field of pesticide compounding. The effective components of the bactericidal composition comprise shenqinmycin A and other bactericides B, wherein the other bactericides B are selected from cyazofamid of a sulfaimidazole bactericide, hymexazol of an oxazole bactericide, fludioxonil of a pyrrole bactericide or fosetyl-aluminum of an organophosphate bactericide. The weight ratio of A to B is 1:100-100: 1. the effective components A and B are compounded to have obvious synergistic effect, and the application amount of each single agent can be effectively reduced. Has good effects of expanding the bactericidal spectrum and delaying the drug resistance of plants, can also prolong the lasting period and has obvious popularization value. The composition can be added with other auxiliary components allowed to be used in pesticides and processed into any dosage form. The bactericidal composition can effectively prevent and treat sheath blight, rice blast, false smut, rust disease, powdery mildew, root rot, sclerotinia, smut, fusarium wilt and the like.

Description

Bactericidal composition and application thereof

Technical Field

The invention relates to a sterilization composition and application thereof, in particular to a sterilization composition containing active ingredients of shenqinmycin and an active bactericide and application thereof, belonging to the technical field of pesticide compounding.

Background

In agricultural production, whether crops can grow healthily is also important for preventing and treating diseases besides being affected by pests and weeds. With the enhancement of environmental protection concept and the implementation of sustainable development strategy, high efficiency, low toxicity, high activity and low residue have become the inevitable trend of pesticide development. However, even if the high-efficiency bactericide is used alone for a long time, the diseases are easy to generate drug resistance, the consumption is increased, the control effect is reduced, the lasting period is shortened, and the like, and the environment sustainable development is not facilitated. Therefore, how to scientifically apply the pesticide, reduce the dosage of the chemical pesticide and improve the pesticide effect becomes a problem to be solved urgently in the field of plant protection.

CyazofaMid (CyazofaMid) is also called as sixanol, 4-chloro-2-cyano-N, N-dimethyl-5-p-tolylimidazole-1-sulfonamide, and Cyazofamid, which belongs to the sulfaimidazole bactericide. Cyazofamid is a mitochondrial respiration inhibitor, has an effect on all growth stages of oomycetes, has no cross resistance with other bactericides, has certain systemic and therapeutic activity, has long lasting period, is rain-wash resistant, is safe to crops, human beings and the environment, but can be used singly for a long time to avoid causing drug resistance of germs to the agents.

Hymexazol (also known as hymexazol) with a molecular formula of C4H5NO2, chemical name: 3-hydroxy-5-methylisoxazole. Hymexazol is a systemic bactericide and is also a soil disinfectant. The composition can bind with iron and aluminum ions in soil to inhibit spore germination. Hymexazol can be absorbed by plant root and moved in root system, and can be metabolized in plant to produce two kinds of glucoside, so that it has the effect of raising physiological activity of crop, and can promote plant growth, tillering of root, increase of root hair and raise activity of root. Hymexazol is a broad-spectrum bactericide which has higher prevention and treatment results on plant diseases caused by various pathogenic fungi, but the hymexazol can be used singly for a long time and can cause pathogenic bacteria to generate drug resistance to the hymexazol.

Fludioxonil (also known as fludioxonil, 4- (2, 2-difluoro-1, 3-benzodioxo-4-yl) pyrrole-3-carbonitrile, toloxan and dulcoside, is a novel pyrrole non-systemic broad-spectrum bactericide, and has the action mechanism that the growth of fungal mycelia can be inhibited by inhibiting transferase related to glucose phosphorylation of thalli, so that germs die. Has good protection and treatment effects on diseases caused by pathogenic bacteria such as alternaria, ascochyta, aspergillus, fusarium, helminthosporium, rhizoctonia and penicillium, and is used for preventing and treating fusarium nivale, black rot wheat, rhizoctonia solani and the like.

phosethyl-Al, also known as phytophthora, fosetyl-aluminium, pyriftalid, clotrimazole, morelin, aluminium triphosphate, fosetyl-aluminium, is an efficient, broad-spectrum, systemic, low-toxicity fungicide for organic phosphorus, and has therapeutic and protective effects. It can conduct in both up and down directions in the plant body. The medicinal liquid has good solubility, strong systemic permeability, long lasting period, and safe use.

The structural formula of the shenqinmycin is shown in (I), the shenqinmycin is an antibiotic secreted by pseudomonas fluorescens M18 through biological culture, and the shenqinmycin has double functions of broad-spectrum inhibition of plant pathogenic bacteria and promotion of plant growth, and has the characteristics of broad spectrum and high efficiency.

The bactericide containing a single active component is frequently used, so that most of germs generate drug resistance, and the control effect is not ideal. Therefore, a novel product is urgently needed to replace a sterilization product with a single active component, increase the drug effect, delay the drug resistance risk of diseases and reduce the economic loss.

Disclosure of Invention

The invention aims to provide a bactericidal composition which has reasonable components, obvious synergistic effect, good bactericidal effect, low medication cost, difficult generation of drug resistance and safety to crops and application thereof.

In order to solve the technical problems, the invention provides the following technical scheme:

the bactericidal composition comprises the effective components of shenqinmycin A and an active bactericide B, wherein the weight ratio of shenqinmycin A to active bactericide B is 1:100-100:1, and preferably 1:50-50:1, more preferably in a weight ratio of 1: 25-25: 1.

in the bactericidal composition of the present invention, the active bactericide may be: cyazofamid of the sulfaimidazole bactericide, hymexazol of the oxazole bactericide, fludioxonil of the pyrrole bactericide, fosetyl-aluminum of the organophosphate bactericide and the like.

The bactericidal composition can also contain auxiliary components of pesticide preparations so as to prepare formulations suitable for agriculture. The auxiliary components of the pesticide preparation are one or more of a solvent, an emulsifier, a dispersant, a stabilizer, an antifreezing agent or a wetting agent.

The bactericidal composition can be prepared into any one dosage form suitable for agriculture by using a known method, and the better dosage form is dry suspending agent (DF), Wettable Powder (WP), Water Dispersible Granule (WDG), suspending agent (SC), seed treating agent or suspension seed coating agent and the like.

Wettable powder A (WP), a solid powder preparation uniformly dispersible in water. The wettable powder of the invention is added with diluents or inert substances such as white carbon black, light calcium carbonate, argil, diatomite, attapulgite and the like and ionic or nonionic surfactants (wetting agents and dispersing agents), wherein the wetting agents include alkylbenzene sulfonate (DBS-Na), alkyl naphthalene sulfonate (nekal), alkylphenol polyoxyethylene ether sulfate, alkylphenol polyoxyethylene ether formaldehyde condensate sulfate, fatty alcohol ethylene oxide adduct sulfonate, alkylamide taurate and fatty alcohol polyoxyethylene ether (JFC), and the content is 0.1-30%; dispersants such as naphthalene sulfonate, naphthalene or alkyl naphthalene formaldehyde condensate sulfonate (NO, NN0, MF), lignin and its derivative sulfonate (M-9, POLYFON, etc.), polyoxyethylene polyoxypropylene ether block copolymer, alkylphenol polyoxyethylene ether formaldehyde condensate Sulfate (SOPA), PVA, CMC content 0.1-30%; also contains one or more substances of penetrant JFC, azone, thiazone and penetrant T, and the content is 0.3-30%; other additives such as stabilizer, foam inhibitor, anti-caking agent, etc. can also be contained.

And B Water Dispersible Granule (WDG) which can be disintegrated and dispersed in water quickly to form a high suspension dispersion system. Consists of active ingredients, auxiliary agents such as wetting agents, dispersing agents, isolating agents, disintegrating agents, stabilizing agents, bonding agents and the like, carriers and other elements. The formulation of the adjuvants and carriers, and the precursors (pre-forms before granulation) are essentially similar to the wettable powders and suspending agents.

C suspending agents (SC), are dispersions of water-insoluble solid pesticides or immiscible liquid pesticides in water or oil. Is prepared by wet superfine grinding of active ingredients and auxiliary agents (wetting dispersant, thickening agent, stabilizing agent, pH regulator, defoaming agent and antifreezing agent). The wetting dispersant can be one or more of naphthalene or alkyl naphthalene formaldehyde condensate sulfonate (NO, NN0, MF), lignin and derivative sulfonate (M-9, POLYFON and the like), alkylphenol polyoxyethylene ether sulfonate, polyoxyethylene polyoxypropylene ether block copolymer, alkylphenol polyoxyethylene phosphate, carboxymethyl cellulose (CMC), polyvinylpyrrolidone (PVP), polyethylene glycol (PEG), condensed phosphate and the like, and the content is 0.1-12%; the thickening agent and the stabilizing agent can be one or more of Xanthan Gum (XG), polyvinyl alcohol (PVA), aluminum magnesium silicate and the like, and the content is 0.05-0.5%; the pH regulator and the defoaming agent can be added in proper amount according to the situation.

The Dry suspending agent (DF) is a granule which can be quickly disintegrated and dispersed in water to form a high-suspension dispersion system. The preparation method comprises the following steps: the formulation resulting from the dehydration of the suspending agent. The formulation of the adjuvants and carriers, and the precursors (preformed objects before dehydration and drying) are in accordance with the suspending agents.

The bactericidal composition is suitable for preparing pesticide preparations for preventing and treating plant diseases. Is particularly suitable for preparing pesticide preparations for preventing and treating rice sheath blight, rice blast, false smut, wheat rust, powdery mildew, wheat root rot, wheat sharp eyespot, rice sheath blight, soybean root rot, sclerotinia rot of colza, corn head smut, pepper wilt, melon wilt and the like.

The germicidal composition of the present invention may be provided as a finished formulation, i.e., the materials in the germicidal composition are already mixed, or the ingredients of the germicidal composition may be provided in a single dose, mixed directly in a tub or tank prior to use, and then diluted to the desired concentration.

The bactericidal composition is applied to a method for preventing and treating diseases, the effective component A and the component B are applied according to the weight ratio of 1:100-100:1, the further application ratio is 1:50-50:1, and the bactericidal composition can be mixed according to the above ratio and then applied, simultaneously applied according to the ratio or sequentially applied according to the ratio. The concrete application mode can be a powder spraying method, a smog method, a fumigation method, seed treatment and soil treatment, ultra-low volume spraying, fertilizer mixing, broadcasting and root irrigation.

Compared with the prior art, the invention has the beneficial effects that:

1. compared with a single agent, the compound has obvious synergistic effect, and the control effect is improved;

2. the composition consists of two active ingredients with different action mechanisms, has good sterilization effect, and is beneficial to overcoming and delaying the generation of drug resistance of pathogenic bacteria;

3. the dosage is reduced by mixing the medicament, thereby reducing the cost and lightening the pollution to the environment.

The invention has reasonable components, treatment and protection functions and low medication cost, and the activity and the sterilization effect of the invention are not simple superposition of the activities of the components, but have obvious synergy, thereby having good safety to crops and meeting the safety requirement of pesticide preparations.

Detailed Description

In order to make the technical problems, solutions and advantages of the present invention more apparent, specific embodiments will be described in detail below, but the present invention is by no means limited to these examples. The following description is only a preferred embodiment of the present invention, and is only for the purpose of explaining the present invention, and should not be construed as limiting the scope of the present invention. It should be understood that any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

The pesticide prepared by combining the effective components of different pesticides is an effective and quick way for developing and researching new pesticides and preventing and controlling resistant germs in agriculture at present. Pesticides of different species, when mixed, typically exhibit a number of three types of action: additive action, synergistic action and antagonistic action. The compound synergistic formula is good, can obviously improve the actual prevention and treatment effect, and reduces the using amount of pesticide, thereby being beneficial to delaying the generation speed of drug resistance of germs and being an important means for comprehensively preventing and treating diseases.

The composition of the invention takes the shenqinmycin (A) as one effective component and the active bactericide (B) as the other effective component, and the combination of the two components has obvious synergistic effect on plant diseases, rather than simple superposition of the effects of the two medicaments, which can be clearly understood from indoor toxicity test results.

In order to prevent and treat tomato late blight in agricultural production, the inventor carries out synergistic research of compounding of shenqinmycin and cyazofamid of sulfaimidazole bactericide, and the specific method comprises the following steps:

the test uses tomato late blight as a test object.

The raw medicines are prepared into required test medicaments, and the test method (leaf method) is referred to the agricultural industry standard of the people's republic of China. Culturing pathogenic bacteria for experiment in suitable culture medium, washing spore with sterile water after producing sporangia, filtering with double-layer gauze to obtain sporangia suspension, placing at 4 deg.C, treating in dark for 0.5-3 hr to release zoospore, and regulating spore concentration to 1 x 10⁵spores/L for standby; or directly prepared 110⁵Sporangia/ml, suspension as inoculum. Preparing the original medicine into a required test agent, uniformly spraying the agent on the back of the leaves, after the liquid medicine is naturally dried, enabling the back of each treated leaf to face upwards, and discharging the liquid medicine into a moisture preservation box according to treatment marks. Each treatment was repeated 4 times with no less than 10 leaves, and a blank was made with treatments containing only solvent and surfactant but no active ingredient. Spray inoculation with sporangia or zoospore suspension. The protective test is generally to inoculate about 24 hours after the medicament treatment; therapeutic trials were generally inoculated 24h prior to treatment with the agent. After inoculation, the cells were alternating daily for 12H in continuous light/dark at a temperature of 18 ℃. And maintaining water film on leaf surface in 24H after inoculation, and culturing for 7 days under the condition that the relative humidity is more than 90%. And (5) when the blank control disease leaf rate reaches more than 50%, investigating the disease condition of each treatment in a grading way. The grading method comprises the following steps: level 0: the disease is not developed; level 1: only a few small disease spots are on the leaves, and the disease spots account for less than 10% of the leaf area; and 3, level: the disease spots on the leaves occupy 10 to 25 percent of the area of the leaves; and 5, stage: the disease spots on the leaves occupy 25 to 50 percent of the area of the leaves; and 7, stage: the disease spots on the leaves occupy more than 50% of the area of the leaves; and 9, stage: the whole leaves are infected with blight.

And (5) investigating the disease indexes of each treatment according to the disease condition of the blank control, and calculating the control effect. The activity of the test agents against pathogens was evaluated by determining the EC50 value for each agent by linear regression analysis between the rate of inhibition and the log of the series of concentrations, and calculating the co-toxicity coefficient (CTC) of the combination using a table of co-toxicity coefficients.

The co-toxicity coefficient (CTC) of the compound preparation is more than or equal to 120, which shows a synergistic effect; CTC is less than or equal to 80 and shows antagonism; 80 < CTC < 120 exhibits additive effects.

TABLE 1 indoor toxicity assay for shenqinmycin and cyazofamid combination for tomato late blight

Drug treatment	Proportioning	Regression equation of virulence	EC50(mg/L)	Co-toxicity coefficient (CTC)
					Shenqinmycin (A)	——	Y＝1.6974X+3.8406	4.8198	——
Cyazofamid (B1)	——	Y＝1.1207X+3.0833	51.3205	——
					A:B1	1:100	Y＝0.8133X+3.7145	38.0600	123.08
A:B1	1:50	Y＝0.8392X+3.7158	33.9062	127.29
					A:B1	1:25	Y＝0.8094X+3.8296	27.9272	134.08
A:B1	1:1	Y＝0.7258X+4.4771	5.2537	167.72
					A:B1	25:1	Y＝0.6666X+4.6275	3.6275	137.67
A:B1	50:1	Y＝0.7039X+4.6006	3.6931	132.88
					A:B1	100:1	Y＝0.7284X+4.5749	3.83361	126.87

Results of indoor virulence determination table 1 shows that in the weight ratio 1:100-100:1, especially in the range 1:50-50:1, especially in the weight ratio 1: 25-25: the compounding of the shenqinmycin and the cyazofamid within the range of 1 has obvious synergistic effect on plant diseases, has more obvious synergistic effect, excellent control effect and better control effect than single-dose varieties.

In order to prevent and treat sclerotinia rot of colza in agricultural production, the inventor carries out synergistic research of compounding with hymexazol of shenqinmycin and oxazole bactericide, and the specific method comprises the following steps:

the test uses sclerotinia rot of colza as the test object.

Preparing the original medicine into a required test medicament, and preparing strains according to a hypha growth rate method: about 10 mM DA medium was poured into the sterilized medium. Under the aseptic condition, a hypha block is taken from the strain slant of the sclerotinia sclerotiorum and is placed in the middle of a culture dish. Continuously culturing for several generations, then inoculating once 3d before the test, and culturing at 24-26 ℃ for later use. The toxic plate is prepared by dissolving the prepared PDA culture medium, and cooling. Under aseptic conditions, 1mL of the liquid medicine is added into a sterilized culture dish, then 9mL of culture medium is absorbed by a pipette and added into the culture dish with the liquid medicine, and the liquid medicine is gently shaken up (3 circles on the left and 3 circles on the right) to prepare a flat plate with uniform thickness. Inoculating bacteria: making the prepared pathogenic bacteria into fungus cake with a puncher, and transferring the fungus cake onto a solidified medicine-containing flat plate with the side of the hypha facing downwards by using an inoculating needle. Marking, and culturing in an incubator at 24-26 ℃. And (5) when the diameter of the colony of the control group is about 6cm, surveying and recording other processed data by a cross method.

The plaque diameter is recorded according to the incidence of the blank control, the percentage of inhibition of the plaque growth is calculated for each treatment, the EC50 value of each medicament is obtained through the linear regression analysis between the probability value of the inhibition and the logarithmic value of the series concentration, and the co-toxicity coefficient (CTC) of the mixed medicament is calculated by using the co-toxicity coefficient table, so as to evaluate the activity of the test medicament on the pathogenic bacteria.

TABLE 2 indoor virulence determination of the complex formulation of shenqinmycin and hymexazol against sclerotinia rot of colza

Results of indoor virulence determination table 2 shows that the ratio of the total mass of the cells in the weight ratio 1:100-100:1, in particular in the range 1:50-50:1, in particular in the weight ratio 1: 25-25: the compounding of the shenqinmycin and the hymexazol within the range of 1 has obvious synergistic effect on plant diseases, has excellent prevention and treatment effect and is better than single-dose varieties.

In order to prevent and treat wheat sharp eyespot in agricultural production, the inventor carries out synergistic research of compounding fludioxonil of shenqinmycin and pyrrole bactericides, and the specific method comprises the following steps:

the test adopts wheat sharp eyespot as a test object.

Preparing a technical material into a required test medicament, wherein the test method comprises the following steps: the biological determination mode of the bactericide-broad bean leaf method refers to the agricultural industry standard of the people's republic of China. Selecting a broad bean susceptible variety potted plant, shearing the same parts, uniformly growing leaves with petioles, placing the leaves in a culture dish, preserving moisture for later use, dissolving and diluting an experimental medicament by adopting original medicine with water, setting 5 mass concentrations, fully soaking the leaves in the pre-configured liquid medicine for 5S, draining off redundant liquid medicine, naturally drying, preserving moisture and culturing according to a treatment mark, and taking the treatment without the medicament as a blank control in the experiment. The side of the cake with hyphae and 5mm in diameter was inoculated by an inoculator into the center of the leaf, and 30 leaves were inoculated per treatment. Protective trials were inoculated 24h after drug treatment, therapeutic trials were inoculated 24h before drug treatment. After inoculation, the mixture is placed in an artificial climate box or a constant temperature and illumination moisture preservation box and cultured under the conditions that the temperature is 26-28 ℃ and the relative humidity is 80-90%. According to the disease condition of the blank control, the length and the width of the lesion spot of each inoculation point are measured and recorded by a caliper, the diameter (unit mm) of the lesion spot is recorded by the average value of the length and the width, according to survey data, the disease spot is disclosed according to the prevention and treatment results: the control effect (blank diameter-treatment diameter)/blank diameter x 100, the percentage of inhibition of lesion growth by each treatment was calculated, the EC50 value of each drug was obtained by linear regression analysis between the probability value of the inhibition and the logarithmic value of the series of concentrations, and the co-toxicity coefficient (CTC) of the drug mixture was calculated using the co-toxicity coefficient table, thereby evaluating the activity of the test agent against pathogens.

TABLE 3 indoor toxicity determination of compounding of shenqinmycin and fludioxonil to wheat sharp eyespot

Drug treatment	Proportioning	Regression equation of virulence	EC50(mg/L)	Co-toxicity coefficient (CTC)
					Shenqinmycin (A)	——	Y＝1.9338X+2.0570	33.2586	——
Fludioxonil (B3)	——	Y＝1.9057X+2.2920	26.3637	——
					A：B3	1:100	Y＝1.2830X+3.2849	21.5031	121.62
A：B3	1:50	Y＝1.0906X+3.6234	18.2905	144.72
					A：B3	1:25	Y＝0.9393X+3.8792	15.6047	170.30
A：B3	1:1	Y＝0.9717X+3.8323	15.6883	187.48
					A：B3	25:1	Y＝1.4046X+3.2208	18.4823	178.15
A：B3	50:1	Y＝15701X+2.8471	23.5048	140.77
					A：B3	100:1	Y＝17365X+2.5490	25.7910	128.61

Results of indoor virulence determination table 3 shows that the ratio of the total mass of the cells in the weight ratio 1:100-100:1, in particular in the range 1:50-50:1, in particular in the weight ratio 1: 25-25: the compounding of the shenqinmycin and the fludioxonil within the range of 1 has obvious synergistic effect on plant diseases, has excellent control effect and is better than single-dose varieties.

In order to prevent and treat lettuce downy mildew in agricultural production, the inventor carries out synergistic research on compounding of shenqinmycin and fosetyl-aluminum of an organophosphorus bactericide, and the specific method comprises the following steps:

the lettuce downy mildew was used as the test subject.

The original medicine is prepared into the required test medicament, and the test method (plate and leaf method) is referred to the agricultural industry standard of the people's republic of China. Selecting a lettuce susceptible variety for potting, shearing the same parts, uniformly growing leaves with petioles, putting the leaves in a culture dish, and preserving moisture for later use. 5 different concentration gradients are set for a single agent and each mixed agent (on the basis of a preliminary test result, the concentration setting is different according to different agent combinations and proportions, and the bacteriostasis rate is set within the range of 5-95%). Uniformly spraying the liquid medicine on the back of the leaves, after the liquid medicine is naturally dried, enabling the back of each treated leaf to face upwards, discharging the liquid medicine into a moisture preservation box for later use after treatment marks are formed, and taking the treatment without the medicine in the test equipment as blank control. Dripping 10uL of prepared fresh spores to the back of leaves, inoculating 4 drops of fresh spores to each leaf, inoculating at least 5 leaves after treatment, inoculating in 24 hours after treatment of a medicament in a protective test, inoculating in 24 hours before treatment of the medicament in a therapeutic test, covering a dish cover, placing in a constant-temperature constant-humidity incubator with the temperature of 17-22 ℃ and the relative humidity of more than 90%, and culturing for 5-7 d, wherein continuous illumination is performed every day and the night is alternated for 12 hours; the plaque diameter is recorded according to the incidence of the blank control, the percentage of inhibition of the plaque growth is calculated for each treatment, the EC50 value of each medicament is obtained through the linear regression analysis between the probability value of the inhibition and the logarithmic value of the series concentration, and the co-toxicity coefficient (CTC) of the mixed medicament is calculated by using the co-toxicity coefficient table, so as to evaluate the activity of the test medicament on the pathogenic bacteria.

TABLE 4 indoor toxicity assay for lettuce downy mildew by compounding shenqinmycin and fosetyl-aluminum

Drug treatment	Proportioning	Regression equation of virulence	EC50(mg/L)	Co-toxicity coefficient (CTC)
					Shenqinmycin (A)	——	Y＝1.8664X+1.9415	43.5238	——
phosethyl-Al (B4)	——	Y＝1.8435X+1.2674	105.8708	——
					A：B4	1:100	Y＝1.7797X+1.7255	69.1631	150.93
A：B4	1:50	Y＝1.5902X+2.2177	56.1834	183.29
					A：B4	1:25	Y＝1.2482X+2.8734	50.5453	198.54
A：B4	1:1	Y＝1.3733X+3.1105	23.7598	259.62
					A：B4	25:1	Y＝1.3500X+3.0151	29.5324	150.79
A：B4	50:1	Y＝1.0815X+3.3718	32.0268	137.49
					A：B4	100:1	Y＝0.8909X+3.6372	33.8661	129.27

Results of indoor virulence determination table 4 shows that the ratio of the total mass of the cells in the weight ratio 1:100-100:1, in particular in the range 1:50-50:1, in particular in the weight ratio 1: 25-25: the compounding of the shenqinmycin and the fosetyl-aluminum within the range of 1 has obvious synergistic effect on plant diseases, has excellent control effect and is better than single-dose varieties.

Results of indoor toxicity measurement tables 1-4 show that compounding of shenqimycin and cyazofamid, shenqinmycin and hymexazol, shenqinmycin and fludioxonil, and shenqinmycin and fosetyl-aluminum has obvious synergistic effect on plant diseases in the weight ratio of 1:100-100:1, especially in the range of 1:50-50:1, and the prevention and treatment effect is excellent and better than that of single-dose varieties. In particular, the weight ratio of 1: 25-25: 1, the compounding synergistic effect of the shenqinmycin and cyazofamid, the shenqinmycin and hymexazol shenqinmycin and fludioxonil, the shenqinmycin and the aluminum triphosphate is more obvious.

In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, embodiments in which shenqinmycin is compounded with cyazofamid, hymexazol, fludioxonil or fosetyl-aluminum respectively in a weight ratio of 1:100 to 100:1 are constructed and described in detail, but the present invention is by no means limited to these examples.

In addition, the inventor also finds out through experiments that the compounding effect of the shenqinmycin and the cyazofamid, the hymexazol, the fludioxonil or the fosetyl-aluminum is superior to that of other antibiotic bactericides and the cyazofamid, the hymexazol, the fludioxonil or the fosetyl-aluminum. In order to clearly illustrate the problem, a comparative example of compounding other antibiotic bactericides with cyazofamid, hymexazol, fludioxonil or fosetyl-aluminum in a weight ratio of 1:100-100:1 is constructed and described in detail. However, due to the limited space, only a few representative comparative examples are listed. It should be noted that the present invention is not limited to the limited comparative examples.

The bactericidal composition can be prepared into any one dosage form suitable for agriculture by using a known method, and the better dosage form is wettable powder, water suspending agent, oil suspending agent, suspending emulsion and water dispersible granules. All percentages in the formulation are by weight. The processing technology of various dosage forms of the composition is the prior art, and can be changed according to different conditions.

The present invention will be further described with reference to the following examples.

Compounding of shenqinmycin and cyazofamid

Example 1: 20.2% shenqimycin cyazofamid suspension (1:100)

The components are 0.2 percent of shenqimycin, 20 percent of cyazofamid, 3 percent of sodium polycarboxylate, 4 percent of fatty alcohol oxyethylene ether, 6 percent of 1, 2-propylene glycol, 0.32 percent of XG, 0.2 percent of organic silicon defoamer, 0.4 percent of sodium benzoate and soft water which is complemented to 100 percent.

The preparation method comprises the following steps: the components are mixed, sheared and mixed evenly at high speed, and then sanded for 2 to 3 hours by a sand mill to ensure that the average grain diameter reaches 1 to 5 microns, thus obtaining the 20.2 percent shenqinmycin cyazofamid suspending agent.

Comparative example 1: 20.2% polyoxin cyazofamid suspension (1:100)

The components are 0.2 percent of polyoxin, 20 percent of cyazofamid, 3 percent of sodium polycarboxylate, 4 percent of fatty alcohol oxyethylene ether, 6 percent of 1, 2-propylene glycol, 0.32 percent of XG, 0.2 percent of organic silicon defoamer, 0.4 percent of sodium benzoate and soft water which is complemented to 100 percent. The preparation method comprises the following steps: as above.

Example 2 16.8% Shenqimycin cyazofamid Water dispersible granules (1:55)

The components are 0.3 percent of shenqinmycin, 16.5 percent of cyazofamid, 6 percent of sodium lignosulphonate, 3 percent of sodium polycarboxylate, 10 percent of anhydrous sodium sulfate and the balance of kaolin to 100 percent.

The preparation method comprises the following steps: the components are mixed, mechanically crushed, airflow crushed, evenly mixed, wet granulated and dried to prepare the 16.8 percent shenqinmycin cyazofamid water dispersible granule.

EXAMPLE 3 25.5% wettable powder of shenqinmycin cyazofamid (1:50)

The components are 0.5 percent of shenqimycin, 25 percent of cyazofamid, 4 percent of sodium dodecyl sulfate, 6 percent of sodium lignosulphonate, 6 percent of white carbon black and light calcium carbonate which are complemented to 100 percent.

The preparation method comprises the following steps: the components are uniformly mixed, mechanically crushed and airflow crushed, and then uniformly mixed, so as to obtain 25.5 percent of shenqinmycin and cyazofamid wettable powder.

Comparative example 2: 25.5% kasugamycin cyazofamid wettable powder (1:50)

The components are 0.5 percent of kasugamycin, 25 percent of cyazofamid, 4 percent of sodium dodecyl sulfate, 6 percent of sodium lignosulphonate, 6 percent of white carbon black and light calcium carbonate which are complemented to 100 percent. The preparation method comprises the following steps: as above.

Example 4 35% Dry suspension of Shenqimycin cyazofamid (1:34)

The components are 1 percent of shenqinmycin, 34 percent of cyazofamid, 10 percent of sodium lignin naphthalene sulfonate, 8 percent of sodium lignin sulfonate, 10 percent of white carbon black, 0.4 percent of organic silicon defoamer, 0.1 percent of sodium benzoate and the balance of kaolin to 100 percent. 150% of soft water and 200%.

The preparation method comprises the following steps: adding water with the preparation amount of 1.5-2.0 times, mixing the components, uniformly mixing the components through high-speed shearing, sanding the mixture for 2-3 hours through a sand mill to ensure that the average particle size reaches 1-5 microns, and dehydrating and drying the mixture to obtain the 35% dry suspending agent of the shenqinmycin and cyazofamid.

Example 5 Shenqimycin cyazofamid Water dispersible granules (1:25)

The components are 1 percent of shenqinmycin, 25 percent of cyazofamid, 4 percent of sodium naphthalenesulfonate, 4 percent of sodium polycarboxylate, 8 percent of anhydrous sodium sulfate and the balance of talcum powder to 100 percent.

The preparation method comprises the following steps: the components are mixed, mechanically crushed, airflow crushed, evenly mixed, wet granulated and dried to obtain the 26 percent shenqinmycin cyazofamid water dispersible granule.

Comparative example 3: 26% ningnanmycin cyazofamid Water dispersible granules (1:25)

The components are 1 percent of ningnanmycin, 25 percent of cyazofamid, 4 percent of sodium naphthalene sulfonate, 4 percent of sodium polycarboxylate, 8 percent of anhydrous sodium sulfate and the balance of talcum powder to 100 percent. The preparation method comprises the following steps: as above.

Example 6 32% Shenqimycin cyazofamid suspension (1:15)

The components are 2 percent of shenqimycin, 30 percent of cyazofamid, 4 percent of acrylic acid-hydroxypropyl acrylate copolymer, 3 percent of fatty alcohol-polyoxyethylene ether, 6 percent of ethylene glycol, 0.25 percent of XG, 0.2 percent of organic silicon defoamer, 0.4 percent of sodium benzoate and the balance of soft water to 100 percent.

The preparation method comprises the following steps: the components are mixed, sheared and mixed evenly at high speed, and then sand milled for 2 to 3 hours by a sand mill to ensure that the average grain diameter reaches 1 to 5 microns, thus obtaining the 16 percent shenqinmycin cyazofamid suspending agent.

Example 7: 20% shenqimycin cyazofamid wettable powder (1:1)

The constituents include shenqinmycin 10%, cyazofamid 10%, sodium dodecylbenzene sulfonate 4%, dodecyl naphthalene sulfonate formaldehyde condensate 6%, white carbon black 6%, and light calcium carbonate to make up to 100%.

The preparation method comprises the following steps: the components are uniformly mixed, mechanically crushed and airflow crushed, and then uniformly mixed, so as to prepare the 20% wettable shenqinmycin-cyazofamid powder.

Comparative example 4: 20% polyoxin cyazofamid wettable powder (1:1)

The constituents include polyoxin 10%, cyazofamid 10%, sodium dodecylbenzene sulfonate 4%, dodecyl naphthalene sulfonate formaldehyde condensate 6%, white carbon black 6%, and light calcium carbonate to make up to 100%. The preparation method comprises the following steps: as above.

Comparative example 5: 20% kasugamycin cyazofamid wettable powder (1:1)

The components are kasugamycin 10%, cyazofamid 10%, sodium dodecyl benzene sulfonate 4%, dodecyl naphthalene sulfonate formaldehyde condensate 6%, white carbon black 6% and light calcium carbonate to make up to 100%. The preparation method comprises the following steps: as above.

Example 8 Devqinmycin cyazofamid Water dispersible granules 21% (19:2)

The components are 19 percent of shenqinmycin, 2 percent of cyazofamid, 3 percent of lauryl sodium sulfate, 4 percent of sodium polycarboxylate, 6 percent of anhydrous sodium sulfate and the balance of talcum powder to 100 percent.

The preparation method comprises the following steps: the components are mixed, mechanically crushed, airflow crushed, evenly mixed, wet granulated and dried to prepare the 21 percent shenqinmycin cyazofamid water dispersible granule.

Example 9: 16% shenqimycin cyazofamid dry suspending agent (15:1)

The components are 15 percent of shenqimycin, 1 percent of cyazofamid, 8 percent of sodium lignosulphonate, 6 percent of white carbon black, 0.4 percent of organic silicon defoamer, 0.1 percent of sodium benzoate and the balance of kaolin to 100 percent. 150% of soft water and 200%.

The preparation method comprises the following steps: adding water with the preparation amount of 1.5-2.0 times, mixing the components, uniformly mixing the components through high-speed shearing, sanding the mixture for 2-3 hours through a sand mill to ensure that the average particle size reaches 1-5 microns, and dehydrating and drying the mixture to obtain the 16% dry suspending agent of the shenqinmycin and cyazofamid.

Example 10 Shenqimycin cyazofamid Water dispersible granules (25:1)

The components are 25 percent of shenqinmycin, 1 percent of cyazofamid, 3 percent of lauryl sodium sulfate, 6 percent of sodium lignosulphonate, 8 percent of anhydrous sodium sulfate and the balance of kaolin to 100 percent.

Comparative example 6: 26% ningnanmycin cyazofamid Water dispersible granules (25:1)

The components are 25 percent of ningnanmycin, 1 percent of cyazofamid, 3 percent of lauryl sodium sulfate, 6 percent of sodium lignosulphonate, 8 percent of anhydrous sodium sulfate and the balance of kaolin to 100 percent. The preparation method comprises the following steps: as above.

Example 11 23% Shenqimycin cyazofamid suspension (45:1)

The components are 22.5 percent of shenqimycin, 0.5 percent of cyazofamid, 4 percent of sodium polycarboxylate, 3 percent of fatty alcohol oxyethylene ether, 5 percent of ethylene glycol, 0.3 percent of XG, 0.2 percent of organic silicon defoamer, 0.4 percent of sodium benzoate and the balance of soft water to 100 percent.

The preparation method comprises the following steps: the components are mixed, sheared and mixed evenly at high speed, and then sanded for 2 to 3 hours by a sand mill to ensure that the average grain diameter reaches 1 to 5 microns, thus obtaining the 23 percent shenqinmycin cyazofamid suspending agent.

Example 12.4% Shenqimycin cyazofamid suspension (50:1)

The components are 20 percent of shenqimycin, 0.4 percent of cyazofamid, 3 percent of sodium polycarboxylate, 3 percent of fatty alcohol oxyethylene ether, 5 percent of 1, 2-propylene glycol, 0.3 percent of XG, 0.2 percent of organic silicon defoamer, 0.4 percent of sodium benzoate and soft water which is complemented to 100 percent.

The preparation method comprises the following steps: the components are mixed, sheared and mixed evenly at high speed, and then sanded for 2 to 3 hours by a sand mill to ensure that the average grain diameter reaches 1 to 5 microns, thus obtaining the 20.4 percent shenqinmycin cyazofamid suspending agent.

Comparative example 7: 20.4% kasugamycin cyazofamid suspension (50:1)

The components are 20 percent of kasugamycin, 0.4 percent of cyazofamid, 3 percent of sodium polycarboxylate, 3 percent of fatty alcohol oxyethylene ether, 5 percent of 1, 2-propylene glycol, 0.3 percent of XG, 0.2 percent of organic silicon defoamer, 0.4 percent of sodium benzoate and soft water which is complemented to 100 percent. The preparation method comprises the following steps: as above.

Example 13 20.2% wettable powder of shenqinmycin cyazofamid (100:1)

The components are as follows: 20% of shenqinmycin, 0.2% of cyazofamid, 3% of sodium dodecyl benzene sulfonate, 6% of sodium lignosulphonate, 6% of white carbon black and talcum powder, wherein the balance is 100%.

The preparation method comprises the following steps: the components are uniformly mixed, mechanically crushed and airflow crushed, and then uniformly mixed, so as to prepare the 20.2 percent wettable shenqinmycin-cyazofamid powder.

Comparative example 8: 20.2% polyoxin cyazofamid wettable powder (100:1)

The components are as follows: 20 percent of polyoxin, 0.2 percent of cyazofamid, 3 percent of sodium dodecyl benzene sulfonate, 6 percent of sodium lignosulphonate, 6 percent of white carbon black and talcum powder which are complemented to 100 percent. The preparation method comprises the following steps: as above.

Compounding of two, shenqinmycin and hymexazol

Example 14: 20.2% shenqinmycin hymexazol water dispersible granule (1:100)

The components are 0.2 percent of shenqinmycin, 20 percent of hymexazol, 3 percent of lauryl sodium sulfate, 4 percent of sodium polycarboxylate, 8 percent of anhydrous sodium sulfate and the balance of kaolin to 100 percent.

The preparation method comprises the following steps: the components are mixed, mechanically crushed, airflow crushed, mixed evenly, granulated by a wet method and dried to prepare the 20.2 percent shenqinmycin-hymexazol water dispersible granule.

Comparative example 9: 20.2% polyoxin hymexazol water dispersible granule (1:100)

The components are 0.2 percent of polyoxin, 20 percent of hymexazol, 3 percent of lauryl sodium sulfate, 4 percent of sodium polycarboxylate, 8 percent of anhydrous sodium sulfate and kaolin which is complemented to 100 percent. The preparation method comprises the following steps: as above.

Example 15 16.8% Shenqinmycin hymexazol suspension concentrate (1:55)

The components are 0.3 percent of shenqinmycin, 16.5 percent of hymexazol, 3 percent of acrylic acid-hydroxypropyl acrylate copolymer, 3 percent of fatty alcohol-polyoxyethylene ether, 6 percent of ethylene glycol, 0.32 percent of XG, 0.2 percent of organic silicon defoamer, 0.4 percent of sodium benzoate and soft water which is complemented to 100 percent.

The preparation method comprises the following steps: the 16.8 percent shenqinmycin-hymexazol suspending agent is prepared by mixing the components, uniformly shearing and mixing the components at a high speed, and sanding the components for 2 to 3 hours by a sand mill to ensure that the average grain diameter reaches 1 to 5 microns.

EXAMPLE 16 25.5% wettable powder of shenqinmycin-hymexazol (1:50)

The components are 0.5 percent of shenqinmycin, 25 percent of hymexazol, 5 percent of sodium naphthalene sulfonate, 3 percent of sodium dodecyl sulfate, 10 percent of white carbon black and the balance of talcum powder to 100 percent.

The preparation method comprises the following steps: the components are uniformly mixed, mechanically crushed and airflow crushed, and then uniformly mixed, so as to prepare 25.5 percent of shenqinmycin-hymexazol wettable powder.

Comparative example 10: 25.5% tetramycin-hymexazol wettable powder (1:50)

The components of the composition are 0.5 percent of tetramycin, 25 percent of hymexazol, 5 percent of sodium naphthalene sulfonate, 3 percent of sodium dodecyl sulfate, 10 percent of white carbon black and the balance of talcum powder to 100 percent. The preparation method comprises the following steps: as above.

Example 17 35% Dry suspension of Shenqinmycin-hymexazol (1:34)

The components are 1 percent of shenqinmycin, 34 percent of hymexazol, 6 percent of sodium lignosulphonate, 8 percent of sodium lignosulphonate, 0.4 percent of organic silicon defoamer, 0.1 percent of sodium benzoate, 10 percent of white carbon black and kaolin which are complemented to 100 percent. 150% of soft water and 200%.

The preparation method comprises the following steps: adding water with the preparation amount of 1.5-2.0 times, mixing the components, uniformly mixing the components through high-speed shearing, sanding the mixture for 2-3 hours through a sand mill to ensure that the average particle size reaches 1-5 microns, and dehydrating and drying the mixture to obtain the 35% dry suspending agent of the shenqinmycin and hymexazol.

Example 18 Water dispersible granules of 26% Shenqinmycin hymexazol (1:25)

The components are 1 percent of shenqinmycin, 25 percent of hymexazol, 4 percent of sodium dodecyl benzene sulfonate, 4 percent of sodium polycarboxylate, 8 percent of anhydrous sodium sulfate and the balance of talcum powder to 100 percent.

The preparation method comprises the following steps: the components are mixed, mechanically crushed, airflow crushed, evenly mixed, wet granulated and dried to prepare the 26 percent shenqinmycin-hymexazol water dispersible granule.

Comparative example 11: 26% polyoxin hymexazol water dispersible granule (1:25)

The components are 1 percent of polyoxin, 25 percent of hymexazol, 4 percent of sodium dodecyl benzene sulfonate, 4 percent of sodium polycarboxylate, 8 percent of anhydrous sodium sulfate and the balance of talcum powder to 100 percent. The preparation method comprises the following steps: as above.

Example 19 32% Shenqinmycin-hymexazol suspension concentrate (1:15)

The components are 2 percent of shenqinmycin, 30 percent of hymexazol, 4 percent of sodium polycarboxylate, 3 percent of fatty alcohol-polyoxyethylene ether, 6 percent of glycol, 0.26 percent of XG, 0.2 percent of organic silicon defoamer, 0.4 percent of sodium benzoate and the balance of soft water to 100 percent.

The preparation method comprises the following steps: the 32 percent shenqinmycin-hymexazol suspending agent is prepared by mixing the components, uniformly shearing and mixing the components at a high speed, and sanding the components for 2 to 3 hours by a sand mill to ensure that the average grain diameter reaches 1 to 5 microns.

Example 20: 20% wettable powder of shenqinmycin-hymexazol (1:1)

The components are 10 percent of shenqinmycin, 10 percent of hymexazol, 6 percent of sodium lignin naphthalene sulfonate, 3 percent of sodium dodecyl benzene sulfonate, 10 percent of white carbon black and kaolin which are complemented to 100 percent.

The preparation method comprises the following steps: the components are uniformly mixed, mechanically crushed and airflow crushed, and then uniformly mixed, so as to prepare the 20% wettable shenqinmycin-hymexazol powder.

Comparative example 12: 20% wettable powder of polyoxin and hymexazol (1:1)

The components are 10 percent of polyoxin, 10 percent of hymexazol, 6 percent of sodium lignin naphthalene sulfonate, 3 percent of sodium dodecyl benzene sulfonate, 10 percent of white carbon black and kaolin which are complemented to 100 percent. The preparation method comprises the following steps: as above.

Example 21% Shenqinmycin hymexazol Water dispersible granules (19:2)

The components are 19 percent of shenqinmycin, 2 percent of hymexazol, 4 percent of sodium dodecyl sulfate, 10 percent of anhydrous sodium sulfate and the balance of talcum powder to 100 percent.

The preparation method comprises the following steps: the components are mixed, mechanically crushed, airflow crushed, mixed evenly, granulated by a wet method and dried to prepare the 21 percent shenqinmycin-hymexazol water dispersible granule.

Example 22: 16% shenqinmycin-hymexazol dry suspending agent (15:1)

The components are 15 percent of shenqinmycin, 1 percent of hymexazol, 4 percent of sodium polycarboxylate, 10 percent of sodium lignin naphthalene sulfonate, 0.4 percent of organic silicon defoamer, 0.1 percent of sodium benzoate, 10 percent of white carbon black and the balance of kaolin to 100 percent. 150% of soft water and 200%.

The preparation method comprises the following steps: adding water with the preparation amount of 1.5-2.0 times, mixing the components, uniformly mixing the components through high-speed shearing, sanding the mixture for 2-3 hours through a sand mill to ensure that the average particle size reaches 1-5 microns, and dehydrating and drying the mixture to obtain the 16% dry suspending agent of the shenqinmycin and hymexazol.

Example 23% Shenqinmycin hymexazol Water dispersible granules (25:1)

The components are 25 percent of shenqinmycin, 1 percent of hymexazol, 4 percent of sodium polycarboxylate, 4 percent of lauryl sodium sulfate, 10 percent of anhydrous sodium sulfate and the balance of kaolin to 100 percent.

Comparative example 13: 26% tetramycin-hymexazol water dispersible granule (25:1)

The components are tetramycin 25%, hymexazol 1%, sodium polycarboxylate 4%, sodium dodecyl sulfate 4%, anhydrous sodium sulfate 10% and kaolin to make up to 100%. The preparation method comprises the following steps: as above.

Example 24 23% Shenqimycin-hymexazol suspension concentrate (45:1)

The components are 22.5 percent of shenqinmycin, 0.5 percent of hymexazol, 3 percent of sodium polycarboxylate, 3 percent of sodium octyl phenol polyoxyethylene ether sulfonate, 6 percent of ethylene glycol, 0.3 percent of XG, 0.2 percent of organic silicon defoamer, 0.4 percent of sodium benzoate and soft water which is complemented to 100 percent.

The preparation method comprises the following steps: the components are mixed, sheared and mixed evenly at high speed, and then the mixture is sanded for 2 to 3 hours by a sand mill to ensure that the average grain diameter reaches 1 to 5 microns, thus obtaining the 23 percent shenqinmycin-hymexazol suspending agent.

Example 25.4% Dry suspension of Shenqinmycin-hymexazol (50:1)

The components are 20 percent of shenqinmycin, 0.4 percent of hymexazol, 6 percent of sodium lignosulphonate, 10 percent of sodium lignosulphonate, 0.4 percent of organic silicon defoamer, 0.1 percent of sodium benzoate, 6 percent of white carbon black and talcum powder which are complemented to 100 percent. 150% of soft water and 200%.

The preparation method comprises the following steps: adding water with the preparation amount of 1.5-2.0 times, mixing the components, uniformly mixing the components through high-speed shearing, sanding the mixture for 2-3 hours through a sand mill to ensure that the average particle size reaches 1-5 microns, and dehydrating and drying the mixture to obtain the 20.4 percent dry suspending agent of the shenqinmycin and hymexazol.

Comparative example 14: 20.4% Doxomycin-hymexazol dry suspending agent (50:1)

The components are 20 percent of polyoxin, 0.4 percent of hymexazol, 6 percent of sodium lignosulfonate, 10 percent of sodium lignosulfonate, 0.4 percent of organic silicon defoamer, 0.1 percent of sodium benzoate, 6 percent of white carbon black and talcum powder which are complemented to 100 percent. 150% of soft water and 200%. The preparation method comprises the following steps: as above.

Example 26 20.2% wettable powder of shenqinmycin-hymexazol (100:1)

The components are as follows: 20% of shenqinmycin, 0.2% of hymexazol, 3% of sodium dodecyl benzene sulfonate, 6% of sodium lignosulphonate, 8% of white carbon black and kaolin which are complemented to 100%.

The preparation method comprises the following steps: the components are uniformly mixed, mechanically crushed and then airflow crushed, and the components are uniformly mixed to prepare 20.2 percent wettable shenqinmycin-hymexazol powder.

Comparative example 15: 20.2% tetramycin-hymexazol wettable powder (100:1)

The components are as follows: 20% of tetramycin, 0.2% of hymexazol, 3% of sodium dodecyl benzene sulfonate, 6% of sodium lignosulphonate, 8% of white carbon black and kaolin, wherein the balance is up to 100%. The preparation method comprises the following steps: as above.

Compounding of sanshenqinmycin and fludioxonil

Example 27: 20.2% shenqinmycin fludioxonil suspending agent (1:100)

The components are 0.2 percent of shenqinmycin, 20 percent of fludioxonil, 3 percent of sodium polycarboxylate, 3 percent of fatty alcohol-polyoxyethylene ether, 6 percent of glycol, 0.32 percent of XG, 0.2 percent of organic silicon defoamer, 0.4 percent of sodium benzoate and the balance of soft water to 100 percent.

The preparation method comprises the following steps: the components are mixed, sheared and mixed evenly at high speed, and then sanded for 2 to 3 hours by a sand mill to ensure that the average grain diameter reaches 1 to 5 microns, thus obtaining the 20.2 percent shenqinmycin fludioxonil suspending agent.

Comparative example 16: 20.2% polyoxin fludioxonil suspension (1:100)

The components are 0.2 percent of polyoxin, 20 percent of fludioxonil, 3 percent of sodium polycarboxylate, 3 percent of fatty alcohol-polyoxyethylene ether, 6 percent of glycol, 0.32 percent of XG, 0.2 percent of organic silicon defoamer, 0.4 percent of sodium benzoate and the balance of soft water to 100 percent. The preparation method comprises the following steps: as above.

Example 28 16.8% Sphenamycin fludioxonil Water dispersible granules (1:55)

The components are 0.3 percent of shenqinmycin, 16.5 percent of fludioxonil, 4 percent of sodium dodecyl benzene sulfonate, 4 percent of sodium polycarboxylate, 8 percent of anhydrous sodium sulfate and the balance of talcum powder to 100 percent.

The preparation method comprises the following steps: the components are mixed, mechanically crushed, airflow crushed, evenly mixed, wet granulated and dried to prepare the 16.8 percent shenqinmycin-fludioxonil water dispersible granule.

Comparative example 17.8% validamycin fludioxonil Water dispersible granule (1:55)

The components are 0.3 percent of validamycin, 16.5 percent of fludioxonil, 4 percent of sodium dodecyl benzene sulfonate, 4 percent of sodium polycarboxylate, 8 percent of anhydrous sodium sulfate and the balance of talcum powder to 100 percent. The preparation method comprises the following steps: as above.

EXAMPLE 29 25.5% wettable powder of shenqinmycin-fludioxonil (1:50)

The components are 0.5 percent of shenqinmycin, 25 percent of fludioxonil, 4 percent of sodium dodecyl benzene sulfonate, 8 percent of sodium naphthalene sulfonate formaldehyde condensate, 6 percent of white carbon black and light calcium carbonate which are complemented to 100 percent.

The preparation method comprises the following steps: the components are uniformly mixed, mechanically crushed and airflow crushed, and then uniformly mixed, so as to obtain 25.5% shenqinmycin-fludioxonil wettable powder.

Comparative example 18: 25.5% kasugamycin fludioxonil wettable powder (1:50)

The components are 0.5 percent of kasugamycin, 25 percent of fludioxonil, 4 percent of sodium dodecyl benzene sulfonate, 8 percent of sodium naphthalene sulfonate formaldehyde condensate, 6 percent of white carbon black and light calcium carbonate which are complemented to 100 percent. The preparation method comprises the following steps: as above.

Example 30% Dry suspension of shenqinmycin-fludioxonil (1:34)

The components are 1 percent of shenqinmycin, 34 percent of fludioxonil, 10 percent of sodium lignosulphonate, 4 percent of sodium polycarboxylate, 5 percent of white carbon black, 0.4 percent of organic silicon defoamer, 0.1 percent of sodium benzoate and the balance of talcum powder to 100 percent. 150% of soft water and 200%.

The preparation method comprises the following steps: adding water with the preparation amount of 1.5-2.0 times, mixing the components, uniformly mixing the components through high-speed shearing, sanding the mixture for 2-3 hours through a sand mill to ensure that the average particle size reaches 1-5 microns, and dehydrating and drying the mixture to obtain the 35% dry suspending agent of the shenqinmycin and fludioxonil.

Example 31 Water dispersible granules of 26% Shenqinmycin fludioxonil (1:25)

The components are 1 percent of shenqinmycin, 25 percent of fludioxonil, 4 percent of sodium naphthalenesulfonate, 4 percent of sodium polycarboxylate, 10 percent of anhydrous sodium sulfate and the balance of talcum powder to 100 percent.

The preparation method comprises the following steps: the components are mixed, mechanically crushed, airflow crushed, evenly mixed, wet granulated and dried to obtain the 26 percent shenqinmycin-fludioxonil water dispersible granule.

COMPARATIVE EXAMPLE 19 26% Ningnanmycin fludioxonil Water dispersible granules (1:25)

The components are 1 percent of ningnanmycin, 25 percent of fludioxonil, 4 percent of sodium naphthalene sulfonate, 4 percent of sodium polycarboxylate, 10 percent of anhydrous sodium sulfate and the balance of talcum powder to 100 percent. The preparation method comprises the following steps: as above.

Example 32% Shenqinmycin fludioxonil suspension (1:15)

The components are 2 percent of shenqinmycin, 30 percent of fludioxonil, 3 percent of sodium polycarboxylate, 3 percent of sodium octyl phenol polyoxyethylene ether sulfonate, 6 percent of ethylene glycol, 0.25 percent of XG, 0.2 percent of organic silicon defoamer, 0.4 percent of sodium benzoate and the balance of soft water to 100 percent.

The preparation method comprises the following steps: the 32 percent shenqinmycin-fludioxonil suspending agent can be prepared by mixing the components, uniformly shearing and mixing the components at a high speed, and sanding the components for 2 to 3 hours by a sand mill to ensure that the average grain diameter reaches 1 to 5 microns.

COMPARATIVE EXAMPLE 20 32% tetramycin fludioxonil suspension (1:15)

The components of the composition are 2 percent of tetramycin, 30 percent of fludioxonil, 3 percent of sodium polycarboxylate, 3 percent of sodium octyl phenol polyoxyethylene ether sulfonate, 6 percent of ethylene glycol, 0.25 percent of XG, 0.2 percent of organic silicon defoamer, 0.4 percent of sodium benzoate and the balance of soft water to 100 percent. The preparation method comprises the following steps: as above.

Example 33: 20% shenqinmycin fludioxonil wettable powder (1:1)

The components are 10 percent of shenqinmycin, 10 percent of fludioxonil, 5 percent of sodium polycarboxylate, 3 percent of sodium dodecyl sulfate, 8 percent of white carbon black and the balance of light calcium carbonate to 100 percent.

The preparation method comprises the following steps: the components are uniformly mixed, mechanically crushed and airflow crushed, and then uniformly mixed, so as to prepare the 20% wettable shenqinmycin-fludioxonil powder.

Comparative example 21: 20% polyoxin fludioxonil wettable powder (1:1)

The components are 10 percent of polyoxin, 10 percent of fludioxonil, 5 percent of sodium polycarboxylate, 3 percent of sodium dodecyl sulfate, 8 percent of white carbon black and light calcium carbonate which are complemented to 100 percent. The preparation method comprises the following steps: as above.

Comparative example 22: 20% kasugamycin fludioxonil wettable powder (1:1)

The components are 10 percent of kasugamycin, 10 percent of fludioxonil, 5 percent of sodium polycarboxylate, 3 percent of sodium dodecyl sulfate, 8 percent of white carbon black and light calcium carbonate which are complemented to 100 percent. The preparation method comprises the following steps: as above.

Example 34 Dexamycin fludioxonil 21% Water dispersible granules (19:2)

The components are 19 percent of shenqinmycin, 2 percent of fludioxonil, 4 percent of sodium dodecyl benzene sulfonate, 4 percent of sodium polycarboxylate, 10 percent of anhydrous sodium sulfate and the balance of talcum powder to 100 percent.

The preparation method comprises the following steps: the components are mixed, mechanically crushed, airflow crushed, evenly mixed, wet granulated and dried to prepare the 21 percent shenqinmycin-fludioxonil water dispersible granule.

Example 35: 16% shenqinmycin-fludioxonil dry suspending agent (15:1)

The components are 15 percent of shenqinmycin, 1 percent of fludioxonil, 8 percent of sodium lignin naphthalene sulfonate, 8 percent of sodium lignin sulfonate, 6 percent of white carbon black, 0.4 percent of organic silicon defoamer, 0.1 percent of sodium benzoate and kaolin which are complemented to 100 percent. 150% of soft water and 200%.

The preparation method comprises the following steps: adding water with the preparation amount of 1.5-2.0 times, mixing the components, uniformly mixing the components through high-speed shearing, sanding the mixture for 2-3 hours through a sand mill to ensure that the average particle size reaches 1-5 microns, and dehydrating and drying the mixture to obtain the 16% dry suspending agent of the shenqinmycin and fludioxonil.

Comparative example 23: 16% validamycin-fludioxonil dry suspending agent (15:1)

The components are 15 percent of validamycin, 1 percent of fludioxonil, 8 percent of sodium lignin naphthalene sulfonate, 8 percent of sodium lignin sulfonate, 6 percent of white carbon black, 0.4 percent of organic silicon defoamer, 0.1 percent of sodium benzoate and the balance of kaolin to 100 percent. 150% of soft water and 200%. The preparation method comprises the following steps: as above.

Example 36 aqueous dispersible granules of 26% shenqinmycin fludioxonil (25:1)

The components are 25 percent of shenqinmycin, 1 percent of fludioxonil, 3 percent of sodium dodecyl sulfate, 6 percent of sodium lignin naphthalene sulfonate, 8 percent of anhydrous sodium sulfate and the balance of kaolin to 100 percent.

Comparative example 24: 26% ningnanmycin fludioxonil Water dispersible granule (25:1)

The components are 25 percent of ningnanmycin, 1 percent of fludioxonil, 3 percent of sodium dodecyl sulfate, 6 percent of sodium lignin naphthalene sulfonate, 8 percent of anhydrous sodium sulfate and the balance of kaolin to 100 percent. The preparation method comprises the following steps: as above.

Example 37 23% Shenqinmycin fludioxonil suspension (45:1)

The components are 22.5 percent of shenqinmycin, 0.5 percent of fludioxonil, 4 percent of sodium polycarboxylate, 3 percent of fatty alcohol oxyethylene ether, 5 percent of ethylene glycol, 0.3 percent of XG, 0.2 percent of organic silicon defoamer, 0.4 percent of sodium benzoate and the balance of soft water to 100 percent.

The preparation method comprises the following steps: the components are mixed, sheared and mixed evenly at high speed, and then sanded for 2 to 3 hours by a sand mill to ensure that the average grain diameter reaches 1 to 5 microns, thus obtaining the 23 percent shenqinmycin fludioxonil suspending agent.

Example 38.4% Dry suspension of shenqinmycin fludioxonil (50:1)

The components are 20 percent of shenqinmycin, 0.4 percent of fludioxonil, 6 percent of sodium lignosulfonate, 10 percent of sodium lignosulfonate, 0.4 percent of organic silicon defoamer, 0.1 percent of sodium benzoate, 6 percent of white carbon black and the balance of talcum powder to 100 percent. 150% of soft water and 200%.

The preparation method comprises the following steps: adding water with the preparation amount of 1.5-2.0 times, mixing the components, uniformly mixing the components through high-speed shearing, sanding the mixture for 2-3 hours through a sand mill to ensure that the average particle size reaches 1-5 microns, and dehydrating and drying the mixture to obtain the 20.4 percent dry suspension of the shenqinmycin and fludioxonil.

Comparative example 25: 20.4% kasugamycin fludioxonil dry suspending agent (50:1)

The components are 20 percent of kasugamycin, 0.4 percent of fludioxonil, 6 percent of sodium lignosulfonate, 10 percent of sodium lignosulfonate, 0.4 percent of organic silicon defoamer, 0.1 percent of sodium benzoate, 6 percent of white carbon black and the balance of talcum powder to 100 percent. 150% of soft water and 200%. The preparation method comprises the following steps: as above.

Example 39 wettable powder of 20.2% shenqinmycin-fludioxonil (100:1)

The components are as follows: 20% of shenqinmycin, 0.2% of fludioxonil, 3% of sodium dodecyl benzene sulfonate, 6% of sodium lignin naphthalene sulfonate, 6% of white carbon black and talcum powder, wherein the balance is 100%.

The preparation method comprises the following steps: the components are uniformly mixed, mechanically crushed and airflow crushed, and then uniformly mixed, so as to prepare the 20.2% shenqinmycin-fludioxonil wettable powder.

Comparative example 26: 20.2% polyoxin fludioxonil wettable powder (100:1)

The components are as follows: 20 percent of polyoxin, 0.2 percent of fludioxonil, 3 percent of sodium dodecyl benzene sulfonate, 6 percent of sodium lignin naphthalene sulfonate, 6 percent of white carbon black and talcum powder which are complemented to 100 percent.

The preparation method comprises the following steps: as above.

Comparative example 27: 20.2% tetramycin fludioxonil wettable powder (100:1)

The components are as follows: 20% of tetramycin, 0.2% of fludioxonil, 3% of sodium dodecyl benzene sulfonate, 6% of sodium lignosulphonate, 6% of white carbon black and talcum powder, wherein the balance is 100%. The preparation method comprises the following steps: as above.

Compounding of tetramethazine mycin and fosetyl-aluminum

Example 40: 20.2% shenqinmycin-phosethyl-Al wettable powder (1:100)

The components are 0.2 percent of shenqinmycin, 20 percent of fosetyl-aluminum, 3 percent of sodium dodecyl benzene sulfonate, 6 percent of sodium lignin naphthalene sulfonate, 10 percent of white carbon black and kaolin which are complemented to 100 percent.

The preparation method comprises the following steps: the components are uniformly mixed, mechanically crushed and then crushed by air flow, and the mixture is uniformly mixed to prepare the 20.2 percent wettable powder of the shenqinmycin and the fosetyl-aluminum.

Comparative example 28 20.2% wettable powder of polyoxin-fosetyl-Al (1:100)

The components are 0.2 percent of polyoxin, 20 percent of fosetyl-aluminum, 3 percent of sodium dodecyl benzene sulfonate, 6 percent of sodium lignin naphthalene sulfonate, 10 percent of white carbon black and kaolin which are complemented to 100 percent. The preparation method comprises the following steps: as above.

Example 41 16.8% Shenqinmycin-phosethyl-Al water dispersible granules (1:55)

The components are 0.3 percent of shenqinmycin, 16.5 percent of fosetyl-aluminum, 4 percent of sodium dodecyl sulfate, 4 percent of sodium polycarboxylate, 15 percent of anhydrous sodium sulfate and the balance of talcum powder to 100 percent.

The preparation method comprises the following steps: the components are mixed, mechanically crushed, airflow crushed, evenly mixed, wet granulated and dried to prepare the 16.8 percent shenqinmycin-phosethyl-Al water dispersible granule.

EXAMPLE 42 25.5% wettable powder of shenqinmycin-fosetyl-Al (1:50)

The components are 0.5 percent of shenqinmycin, 25 percent of fosetyl-aluminum, 5 percent of sodium dodecyl benzene sulfonate, 8 percent of sodium lignin naphthalene sulfonate, 10 percent of white carbon black and the balance of light calcium carbonate to 100 percent.

The preparation method comprises the following steps: the components are uniformly mixed, mechanically crushed and then airflow crushed, and the mixture is uniformly mixed to prepare 25.5 percent shenqinmycin-phosethyl-Al wettable powder.

Comparative example 29: 25.5% kasugamycin-fosetyl-aluminum wettable powder (1:50)

The components are 0.5 percent of kasugamycin, 25 percent of fosetyl-aluminum, 5 percent of sodium dodecyl benzene sulfonate, 8 percent of sodium lignin naphthalene sulfonate, 10 percent of white carbon black and light calcium carbonate which are complemented to 100 percent. The preparation method comprises the following steps: as above.

Example 43% Dry suspension of shenqinmycin-fosetyl-Al (1:34)

The components are 1 percent of shenqinmycin, 34 percent of fosetyl-aluminum, 10 percent of sodium lignin-naphthalene sulfonate, 6 percent of sodium lignin sulfonate, 12 percent of white carbon black, 0.4 percent of organic silicon defoamer, 0.1 percent of sodium benzoate and the balance of talcum powder to 100 percent. 150% of soft water and 200%.

The preparation method comprises the following steps: adding water with the preparation amount of 1.5-2.0 times of that of the preparation, mixing the components, uniformly mixing the components by high-speed shearing, sanding the mixture for 2-3 hours by a sand mill to ensure that the average particle size reaches 1-5 microns, and dehydrating and drying the mixture to obtain the 35% shenqinmycin-fosetyl-aluminum dry suspending agent.

Example 44 Shenqimycin-phosethyl-Al water dispersible granules (1:25)

The components are 1 percent of shenqinmycin, 25 percent of fosetyl-aluminum, 4 percent of sodium dodecyl benzene sulfonate, 4 percent of sodium polycarboxylate, 15 percent of anhydrous sodium sulfate and the balance of talcum powder to 100 percent.

The preparation method comprises the following steps: the components are mixed, mechanically crushed, airflow crushed, evenly mixed, wet granulated and dried to prepare the 26 percent shenqinmycin-fosetyl-aluminum water dispersible granule.

Comparative example 30: 26% validamycin-fosetyl-Al water dispersible granule (1:25)

The components are 1 percent of validamycin, 25 percent of fosetyl-aluminum, 4 percent of sodium dodecyl benzene sulfonate, 4 percent of sodium polycarboxylate, 15 percent of anhydrous sodium sulfate and the balance of talcum powder to 100 percent. The preparation method comprises the following steps: as above.

EXAMPLE 45 32% wettable powder of shenqinmycin-fosetyl-Al (1:15)

The components are 2 percent of shenqinmycin, 30 percent of fosetyl-aluminum, 3 percent of sodium dodecyl benzene sulfonate, 5 percent of sodium polycarboxylate, 12 percent of white carbon black and the balance of talcum powder to 100 percent.

The preparation method comprises the following steps: the 32 percent wettable shenqinmycin-phosethyl-Al powder can be prepared by uniformly mixing the components, mechanically crushing the components, and uniformly mixing the components after airflow crushing.

Example 46: 20% shenqinmycin-fosetyl-aluminum dry suspending agent (1:1)

The components are 10 percent of shenqinmycin, 10 percent of fosetyl-aluminum, 5 percent of sodium polycarboxylate, 10 percent of sodium lignosulphonate, 0.4 percent of organic silicon defoamer, 0.1 percent of sodium benzoate, 8 percent of white carbon black and kaolin which are complemented to 100 percent. 150% of soft water and 200%.

The preparation method comprises the following steps: adding water with the preparation amount of 1.5-2.0 times of that of the preparation, mixing the components, uniformly mixing the components by high-speed shearing, sanding the mixture for 2-3 hours by a sand mill to ensure that the average particle size reaches 1-5 microns, and dehydrating and drying the mixture to obtain the 25% shenqinmycin-fosetyl-aluminum dry suspending agent.

Comparative example 31: 20% tetramycin-fosetyl-aluminum dry suspending agent (1:1)

The components are tetramycin 10%, fosetyl-aluminum 10%, sodium polycarboxylate 5%, sodium lignosulphonate 10%, organic silicon defoamer 0.4%, sodium benzoate 0.1%, white carbon black 8% and kaolin to make up to 100%. 150% of soft water and 200%. The preparation method comprises the following steps: as above.

Comparative example 32: 20% kasugamycin-fosetyl-aluminum dry suspending agent (1:1)

The components of the composition are 10 percent of kasugamycin, 10 percent of fosetyl-aluminum, 5 percent of sodium polycarboxylate, 10 percent of sodium lignosulfonate, 0.4 percent of organic silicon defoamer, 0.1 percent of sodium benzoate, 8 percent of white carbon black and kaolin which are complemented to 100 percent. 150% of soft water and 200%. The preparation method comprises the following steps: as above.

Example 47 Shenqinmycin-phosethyl-Al water dispersible granules 21% (19:2)

The components are 19 percent of shenqinmycin, 2 percent of fosetyl-aluminum, 4 percent of sodium polycarboxylate, 4 percent of lauryl sodium sulfate, 10 percent of anhydrous sodium sulfate and the balance of talcum powder to 100 percent.

The preparation method comprises the following steps: the components are mixed, mechanically crushed, airflow crushed and evenly mixed, and then wet granulation and drying are carried out, thus obtaining the 21% shenqinmycin-fosetyl-aluminum water dispersible granule.

Example 48: 16% shenqinmycin-fosetyl-aluminum suspending agent (15:1)

The components are 15 percent of shenqinmycin, 1 percent of fosetyl-aluminum, 4 percent of sodium polycarboxylate, 3 percent of fatty alcohol oxyethylene ether, 5 percent of ethylene glycol, 0.35 percent of XG, 0.2 percent of organic silicon defoamer, 0.4 percent of sodium benzoate and the balance of soft water to 100 percent.

The preparation method comprises the following steps: the components are mixed, sheared and mixed evenly at high speed, and then the mixture is sanded for 2 to 3 hours by a sand mill to ensure that the average grain diameter reaches 1 to 5 microns, thus obtaining the 16 percent shenqinmycin-fosetyl-aluminum suspending agent.

Example 49 Shenqinmycin-fosetyl-Al water dispersible granules (25:1)

The components are 25 percent of shenqinmycin, 1 percent of fosetyl-aluminum, 3 percent of sodium dodecyl benzene sulfonate, 6 percent of sodium lignin naphthalene sulfonate, 6 percent of anhydrous sodium sulfate and kaolin which are complemented to 100 percent.

Comparative example 33% tetramycin-fosetyl-Al Water dispersible granules (25:1)

The components are 25 percent of shenqinmycin, 1 percent of fosetyl-aluminum, 3 percent of sodium dodecyl benzene sulfonate, 6 percent of sodium lignin naphthalene sulfonate, 6 percent of anhydrous sodium sulfate and kaolin which are complemented to 100 percent. The preparation method comprises the following steps: as above.

Example 50 23% shenqinmycin-fosetyl-Al suspension (45:1)

The components are 22.5 percent of shenqinmycin, 0.5 percent of fosetyl-aluminum, 3 percent of acrylic acid-hydroxypropyl acrylate copolymer, 3 percent of fatty alcohol oxyethylene ether, 5 percent of ethylene glycol, 0.3 percent of XG, 0.2 percent of organic silicon defoamer, 0.4 percent of sodium benzoate and soft water which is complemented to 100 percent.

The preparation method comprises the following steps: the components are mixed, sheared and mixed evenly at high speed, and then the mixture is sanded for 2 to 3 hours by a sand mill to ensure that the average grain diameter reaches 1 to 5 microns, thus preparing the 23 percent shenqinmycin-fosetyl-aluminum suspending agent.

Example 51.4% Shenqinmycin-fosetyl-Al dry suspension (50:1)

The components are 20 percent of shenqinmycin, 0.4 percent of fosetyl-aluminum, 8 percent of sodium lignosulfonate, 0.4 percent of organic silicon defoamer, 0.1 percent of sodium benzoate, 6 percent of white carbon black and the balance of talcum powder to 100 percent. 150% of soft water and 200%.

The preparation method comprises the following steps: adding water with the preparation amount of 1.5-2.0 times, mixing the components, uniformly mixing the components through high-speed shearing, sanding the mixture for 2-3 hours through a sand mill to ensure that the average particle size reaches 1-5 microns, and dehydrating and drying the mixture to obtain the 20.4 percent dry suspending agent of the shenqinmycin and the fosetyl-aluminum.

Comparative example 34: 20.4% kasugamycin-fosetyl-aluminum dry suspending agent (50:1)

The components are 20 percent of kasugamycin, 0.4 percent of fosetyl-aluminum, 8 percent of sodium lignosulfonate, 0.4 percent of organic silicon defoamer, 0.1 percent of sodium benzoate, 6 percent of white carbon black and the balance of talcum powder to 100 percent. 150% of soft water and 200%. The preparation method comprises the following steps: as above.

EXAMPLE 52 20.2% wettable powder of shenqinmycin-fosetyl-Al (100:1)

The components are as follows: 20% of shenqinmycin, 0.2% of fosetyl-aluminum, 3% of sodium dodecyl benzene sulfonate, 6% of sodium naphthalene sulfonate formaldehyde condensate, 6% of white carbon black and kaolin for supplementing to 100%.

Comparative example 35: 20.2% polyoxin-fosetyl-Al wettable powder (100:1)

The components are as follows: 20% of shenqinmycin, 0.2% of fosetyl-aluminum, 3% of sodium dodecyl benzene sulfonate, 6% of sodium naphthalene sulfonate formaldehyde condensate, 6% of white carbon black and kaolin for supplementing to 100%. The preparation method comprises the following steps: as above.

It was found through experiments that cyazofamid, hymexazol, fludioxonil or fosetyl-aluminum in the above examples can be substituted for each other to form new examples. It will be understood that those skilled in the art can make various modifications and improvements without departing from the principles of the invention, and such modifications and improvements are intended to be within the scope of the invention.

The pesticide preparations prepared by the above examples and comparative examples are used for controlling cucumber downy mildew and tomato late blight.

1. And (3) test treatment: the test is carried out according to the standard of the people's republic of China (pesticide field efficacy test criteria). The dosage of the test medicament is respectively set with three treatment concentrations according to different components, and the reference medicaments are respectively 20% cyazofamid suspending agent, 1% shenqinmycin SC and blank clear water test of the commercially available pesticide.

2. The test method comprises the following steps: each cell area is 50m²The method is repeated for 4 times, and the method for investigating before application and the pesticide effect after prevention and treatment comprises the following steps: and (5) carrying out graded investigation on the morbidity by blank control, sampling diagonally each cell, selecting 10 plants at each point, and recording the total number of plants, the number of diseased plants and the number of diseased plants.

The cucumber downy mildew field investigation standard adopts the following grading method:

level 0: no disease;

level 1: the lesion area accounts for less than 5% of the whole leaf area;

and 3, level: the lesion area accounts for 5 to 10 percent of the whole leaf area;

and 5, stage: the lesion area accounts for 11% -25% of the whole leaf area;

and 7, stage: the lesion area accounts for 26-50% of the whole leaf area;

and 9, stage: the lesion area accounts for more than 50% of the whole leaf area;

the test results are shown in tables 5 and 6 below:

TABLE 5 prevention and control of cucumber downy mildew by compounding shenqimycin (A) and cyazofamid (B)

Table 5 the field efficacy results show that, at a weight ratio of 1:100-100: within the range of 1, the compounding synergistic effect of the shenqimycin and the cyazofamid is obvious, and particularly, the compound synergistic effect is as follows: 50-50:1, in particular 1: 25-25: within 1 range, has excellent control effect on cucumber downy mildew, and the control effect is better than that of a single-dose variety.

The field survey standard for the tomato late blight adopts the following grading method:

level 0: no disease;

level 1: the individual leaf has individual scab;

and 3, level: 1/3 the lower leaf has scab;

and 5, stage: 1/3-1/2 of leaf blade with scab;

and 7, stage: almost all leaves have lesions;

and 9, stage: all the leaves are mildewed and rotten and almost have no green parts;

other statistical and experimental methods are the same as above.

TABLE 6 comparison of control effect on tomato late blight with comparative example

The inventor finds that other antibiotic bactericides and cyazofamid are compounded in the weight ratio of 1:100-100: has certain compounding synergistic effect within the range of 1. For the sake of space limitation, it is not always the case that the control effect comparison between the comparative example and the example is only established by the most representative kasugamycin, polyoxin and ningnanmycin, as shown in the field efficacy results of table 6, the weight ratio of the components is 1:100-100: within the range of 1, the compounding synergistic effect of the shenqinmycin and the cyazofamid is obvious and better than the prevention and treatment effect of compounding other antibiotic bactericides and the cyazofamid. In particular, in the following 1:50-50:1, in particular 1: 25-25: within the range of 1, the compounding synergistic effect of the shenqinmycin and the cyazofamid is obvious, and the control effect on plant diseases is better than that of the compounding of other antibiotic bactericides and the cyazofamid.

The pesticide preparations prepared by the above examples and comparative examples are used for preventing and treating wheat root rot and soybean root rot.

1. And (3) test treatment: the test is carried out according to the standard of the people's republic of China (pesticide field efficacy test criteria). The dosage of the test medicament is respectively set with three treatment concentrations according to different components, and the reference medicaments are respectively a 30% hymexazol water aqua, 1% shenqinmycin SC and a blank clear water test of a commercially available pesticide.

The following classification method was used:

level 0: the base of the stem, the main root and the fibrous root have no disease spots;

level 1: a small amount of scabs are arranged on the base part and the main root of the stem, and the area of the scabs accounts for less than one fourth of the total area of the stem and the root;

and 3, level: the base part and the main root of the stem are provided with a plurality of disease spots, and the area of the disease spots accounts for one fourth and one half of the total area of the stem and the root;

and 5, stage: the base part and the main root of the stem are provided with a plurality of disease spots, and the area of the disease spots accounts for one half and three quarters of the total area of the stem and the root;

and 7, stage: the root part of the stem and the lesion on the main root are connected, but the root system does not die;

and 9, stage: root necrosis, i.e., the overground part of the plant wilts and dies nearly or dies;

the test results are shown in tables 7 and 8 below:

TABLE 7 prevention and cure effect of shenqinmycin (A) and hymexazol (B) combination on wheat root rot

Table 5 the field efficacy results show that, at a weight ratio of 1:100-100: within the range of 1, the compounding synergistic effect of the shenqinmycin and the hymexazol is obvious, and particularly 1:50-50:1, in particular 1: 25-25: within 1 range, has excellent control effect on wheat root rot, and has better control effect than single-dose varieties.

TABLE 8 comparison of the control effects on Soybean root rot in examples and comparative examples

The inventor finds that other antibiotic bactericides and hymexazol are compounded in the weight ratio of 1:100-100: has certain compounding synergistic effect within the range of 1. For the sake of space limitation, it is not always the same, but only the most representative polyoxins and tetramycin are used to construct the comparative examples and the examples for the control effect comparison, as shown in the field efficacy results of table 8, the weight ratio is 1:100-100: within the range of 1, the compounding synergistic effect of the shenqinmycin and the hymexazol is obvious and better than the prevention and treatment effect of compounding other antibiotic bactericides and the hymexazol. In particular, in the following 1:50-50:1, in particular 1: 25-25: within the range of 1, the compounding synergistic effect of the shenqinmycin and the hymexazol is obvious, and the control effect on plant diseases is better than that of the compounding of other antibiotic bactericides and the hymexazol.

The pesticide preparations prepared by the above examples and comparative examples are used for preventing and controlling strawberry gray mold and mango anthracnose.

1. And (3) test treatment: the test is carried out according to the standard of the people's republic of China (pesticide field efficacy test criteria). The dosage of the test medicament is respectively set with three treatment concentrations according to different components, and the reference medicaments are respectively a commercially available pesticide of 25g/l fludioxonil wettable powder, 1% shenqinmycin SC and a blank clear water test.

The following classification method was used:

level 0: no disease;

level 1: the lesion area accounts for less than 5% of the whole leaf area;

and 3, level: the lesion area accounts for 6 to 15 percent of the whole leaf area;

and 5, stage: the lesion area accounts for 16-25% of the whole leaf area;

and 7, stage: the area of the lesion spots accounts for less than 26-50% of the area of the whole leaf;

the test results are shown in tables 9 and 10 below:

TABLE 9 prevention and control effect of complex formulation of shenqinmycin (A) and fludioxonil (B) on gray mold of strawberry

Table 9 field efficacy results show that, at a weight ratio of 1:100-100: within the range of 1, the compounding synergistic effect of the shenqinmycin and the fludioxonil is obvious, and particularly, the compound has the following formula (1): 50-50:1, in particular 1: 25-25: within 1 range, has excellent prevention and treatment effect on the gray mold of the strawberry, and the prevention and treatment effect is better than that of a single-dose variety.

TABLE 10 comparison of control of mango anthracnose between examples and comparative examples

The inventor finds that other antibiotic bactericides are compounded with fludioxonil in a weight ratio of 1:100-100: has certain compounding synergistic effect within the range of 1. For the sake of space limitation, it is not always the case that the control effect comparison between the comparative examples and the examples is only established by the most representative kasugamycin, polyoxin, ningnanmycin, validamycin and tetramycin, as shown in the field efficacy results of table 10, the weight ratio of the components is 1:100-100: within the range of 1, the compounding synergistic effect of the shenqinmycin and the fludioxonil is obvious and better than the prevention and treatment effect of compounding other antibiotic bactericides and the fludioxonil. In particular, in the following 1:50-50:1, in particular 1: 25-25: within the range of 1, the compounding synergistic effect of the shenqinmycin and the fludioxonil is obvious, and the control effect on plant diseases is better than that of the compounding of other antibiotic bactericides and the fludioxonil.

The pesticide preparations prepared by the above examples and comparative examples are used for controlling Chinese cabbage downy mildew and tobacco black shank.

1. And (3) test treatment: the test is carried out according to the standard of the people's republic of China (pesticide field efficacy test criteria). The dosage of the test medicament is respectively set with three treatment concentrations according to different components, and the reference medicaments are respectively 40% fosetyl-aluminum wettable powder of a commercially available pesticide, 1% shenqinmycin SC and a blank clear water test.

The following classification method was used:

level 0: no disease;

level 1: the lesion area accounts for less than 5% of the whole leaf area;

and 5, stage: the lesion area accounts for 11% -25% of the whole leaf area;

and 7, stage: the lesion area accounts for 26-50% of the whole leaf area;

the test results are shown in tables 11 and 12 below:

TABLE 11 prevention and control of cabbage downy mildew by compounding shenqinmycin (A) and fosetyl-aluminum (B)

Table 11 the field efficacy results show that, at a weight ratio of 1:100-100: within the range of 1, the compounding synergistic effect of the shenqinmycin and the fosetyl-aluminum is obvious, and particularly, the compound synergistic effect is 1:50-50:1, in particular 1: 25-25: within 1 range, has excellent control effect on the cabbage downy mildew, and the control effect is better than that of a single-dose variety.

Tobacco black shank investigation criteria:

level 0: the whole plant is disease-free;

level 1: the lesion of the stem part does not exceed one half of the stem circumference, or half of the leaves are slightly withered, or a few lower leaves have the lesion;

and 3, level: the lesion on the stem exceeds one half of the stem circumference, or half of the lesion on the stem leaves is slightly wilted;

and 5, stage: the lesion of the stem part surrounds the periphery of the stem, or more than two thirds of the leaves wither;

and 7, stage: all leaves of the diseased plants wither or die.

TABLE 12 comparison of the control effect of the examples and comparative examples on tobacco black shank

The inventor finds that other antibiotic bactericides are compounded with fosetyl-aluminum in a weight ratio of 1:100-100: has certain compounding synergistic effect within the range of 1. For the sake of space limitation, it is not always the same, but only the most representative kasugamycin, polyoxin, validamycin, and tetramycin are used to construct the comparative examples and the examples for comparison of control effect, as shown in the field efficacy results of table 12, the weight ratio is 1:100-100: within the range of 1, the compounding synergistic effect of the shenqinmycin and the fosetyl-aluminum is obvious and better than the prevention and treatment effect of compounding other antibiotic bactericides and fosetyl-aluminum. In particular, in the following 1:50-50:1, in particular 1: 25-25: within the range of 1, the compounding synergistic effect of the shenqinmycin and the fosetyl-aluminum is obvious, and the control effect on plant diseases is better than that of the compounding of other antibiotic bactericides and fosetyl-aluminum.

The inventor finds that the compounding of the shenqinmycin and cyazofamid, the shenqinmycin and hymexazol, the shenqinmycin and fludioxonil, the shenqinmycin and aluminum triphosphate has obvious synergistic effect on plant diseases. In the same ratio range of 1:100-100:1, in particular in the range from 1:50 to 50:1, especially 1: 25-25: 1, the compounding of the shenqinmycin and cyazofamid, the shenqinmycin and hymexazol, the shenqinmycin and fludioxonil, and the shenqinmycin and aluminum triphosphate also has obvious synergistic effect. Due to the limited space, the description is not repeated.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. The bactericidal composition is characterized by comprising active ingredients of shenqinmycin and an active bactericide, wherein the weight ratio of the shenqinmycin to the active bactericide is 1:100-100: 1;

the active bactericide is fosetyl-aluminum.

2. The bactericidal composition of claim 1, wherein the weight ratio of the shenqinmycin to the active bactericide is 1:50-50: 1.

3. the bactericidal composition of claim 2, wherein the weight ratio of the shenqinmycin to the active bactericide is 1: 25-25: 1.

4. the bactericidal composition according to any one of claims 1 to 3, wherein the bactericidal composition further comprises an auxiliary ingredient for a pesticide preparation to prepare a formulation suitable for agricultural use.

5. The bactericidal composition of claim 4, wherein the adjuvant ingredients of the pesticide preparation are one or more of a solvent, an emulsifier, a dispersant, a stabilizer, an antifreeze and a wetting agent.

6. The bactericidal composition of claim 4, wherein the bactericidal composition is in the form of a suspending agent, a dry suspending agent, a water dispersible granule, a wettable powder, a seed treatment agent or a suspended seed coating agent.

7. Use of the fungicidal composition according to any one of claims 1 to 6 for the preparation of a pesticidal formulation for the control of plant diseases.

8. The bactericidal composition as set forth in claim 7, wherein the bactericidal composition is used for preparing pesticide preparations for controlling rice sheath blight, rice blast, false smut, wheat rust, powdery mildew, wheat root rot, wheat sheath blight, soybean root rot, sclerotinia rot of colza, maize head smut, pepper wilt and melon wilt.

9. The method for controlling diseases by applying the bactericidal composition as defined in any one of claims 1 to 6, wherein the active ingredients shenqinmycin and the active bactericide are applied in the above weight ratio, mixed in proportion and then applied, simultaneously applied in proportion or sequentially applied in proportion.