CN111972420A - Bactericidal composition containing penflufen and fluroxypyr - Google Patents

Abstract

The invention relates to a bactericidal composition containing penflufen and fluroxypyr, which comprises the active ingredients of penflufen and fluroxypyr, wherein the mass ratio of the active ingredients of penflufen and fluroxypyr is 1: 80-80: 1. The composition has higher activity on diseases of crops, and has the characteristics of obvious synergistic effect, dosage reduction and obvious synergistic effect.

Description

Bactericidal composition containing penflufen and fluroxypyr

Technical Field

The invention belongs to the technical field of pesticides, and relates to application of a bactericidal composition containing penflufen and meperflutonazole in crop diseases.

Background

Fluxapyroxad aniline (penflufen) chemical name: n- [2- (1, 3-dimethylbutyl 0-phenyl ] -5-fluoro-1, 3-dimethyl-1H-pyrazole-4-carboxamide, CAS number 494793-67-8, structural formula:

the penflufen is a pyrazole amide bactericide developed, developed and produced by Bayer companies, belongs to succinate dehydrogenase inhibitor (SDHI) bactericides, and can be used for disease control of crops such as potatoes, grains, cruciferous vegetables, cotton and the like.

Chemical name of chlorofluoromethrizole (mefentrifluconazole): (2RS) -2- [4- (4-chlorophenoxy) - α, α, α -trifluoro-o-tolyl ] -1- (1H-1,2, 4-triazol-1-yl) propan-2-ol, CAS No.: 1417782-03-6, the structural formula is as follows:

chlorofloxacin is a C14-demethylation inhibitor in sterol biosynthesis. The unique isopropanol group in the molecule can be flexibly combined with a target from free state free rotation to form a combined state, thereby well inhibiting the transfer of the septoria, reducing the mutation of pathogenic bacteria and delaying the generation and development of resistance. The chlorofluoroether ipconazole shows excellent biological performance, has broad spectrum, high efficiency, quick effect, lasting effect, protective, therapeutic and eradicating effects, simultaneously has systemic conductivity, and can prevent and control a plurality of fungal diseases which are difficult to control, such as rust disease, diseases caused by Septoria, and the like. The fertilizer is suitable for more than 60 kinds of crops in the world, such as field crops, economic crops, special crops and the like, such as field crops of corn, soybean, rice and the like, and economic crops of green pepper, grape and the like, and is applied to lawns, ornamental plants and the like.

The compounding of the components with different action mechanisms is an effective method for delaying the resistance of pathogenic bacteria, namely the compounding of different components is carried out, and whether certain compounding is synergistic, additive or antagonistic needs to be judged according to the actual application effect. Through screening of indoor activity and field efficacy, the inventor finds that the penflufen and the cloroxen are mixed to have good indoor activity and field efficacy on rice sheath blight disease and cucumber powdery mildew.

Disclosure of Invention

The invention aims to provide a bactericidal composition containing penflufen and meperflutol, which has a synergistic effect, low use cost and good control effect.

The technical scheme of the invention is as follows:

the active ingredients of the bactericidal composition comprise fluxapyroxad serving as an active ingredient and chlorofluoromethane serving as an active ingredient.

The mass ratio of the active ingredients of the bactericidal composition, namely penflufen and fluroxypyr, is 1: 80-80: 1;

further, the mass ratio of the active ingredients of the bactericidal composition, namely penflufen to the meperflutonazole, is 1: 50-50: 1;

further, the mass ratio of the active ingredients of the bactericidal composition, namely penflufen to the meperflutonazole, is 1: 20-20: 1;

further, the mass ratio of the active ingredients of the bactericidal composition, namely penflufen to the meperflutonazole, is 1: 10-10: 1;

furthermore, the mass ratio of the fluxapyroxad to the chlorofluoromethane as active ingredients of the sterilization composition is 1: 3-5: 1.

The bactericidal composition comprises 1-90% of the composition by mass of the sum of the active ingredient fluxapyroxad aniline and the active ingredient fluroxypyr, and preferably 10-50% of the composition by mass of the sum.

The bactericidal composition can be prepared into preparation formulations which are agriculturally allowed to be used by active ingredients and auxiliary ingredients;

further, the auxiliary components of the pesticide preparation comprise a carrier and an auxiliary agent;

further, the carrier is any one of water, a solvent or a filler, and the water is preferably deionized water;

further, the solvent is selected from one or a mixture of more of N, N-dimethylformamide, cyclohexanone, toluene, xylene, dimethyl sulfoxide, methanol, ethanol, trimethylcyclohexanone, N-octylpyrrolidone, ethanolamine, triethanolamine, isopropylamine, N-methylpyrrolidone, propanol, butanol, ethylene glycol, diethylene glycol, ethylene glycol methyl ether, butyl ether, ethanolamine, isopropylamine, ethyl acetate or acetonitrile;

further, the filler is selected from one or a mixture of more of kaolin, diatomite, bentonite, attapulgite, white carbon black, starch or light calcium carbonate;

furthermore, the auxiliary agent at least comprises a surfactant, and other functional auxiliary agents such as an antifreezing agent, a thickening agent, a stabilizing agent, a disintegrating agent, a defoaming agent and the like can be added according to different use occasions and requirements;

Further, the surfactant is selected from one or more of an emulsifier, a dispersant, a wetting agent or a penetrant;

further, the other functional auxiliary agents are selected from one or more of an antifreezing agent, a thickening agent, a stabilizing agent, a disintegrating agent or a defoaming agent;

further, the emulsifier is selected from one or more of agricultural milk 500# (calcium alkyl benzene sulfonate), OP series phosphate ester (nonylphenol polyoxyethylene ether phosphate ester), 600# phosphate ester (phenylphenol polyoxyethylene ether phosphate ester), styrene polyoxyethylene ether ammonium sulfate salt, magnesium salt of alkyl diphenyl ether disulfonate, triethanolamine salt, agricultural milk 400# (benzyldimethylphenol polyoxyethylene ether), agricultural milk 700# (alkylphenol formaldehyde resin polyoxyethylene ether), Ningru 36# (phenethylphenol formaldehyde resin polyoxyethylene ether), agricultural milk 1600# (phenethylphenol polyoxyethylene polyoxypropylene ether), ethylene oxide-propylene oxide block copolymer, OP series (nonylphenol polyoxyethylene ether), BY series (castor oil polyoxyethylene ether), agricultural dehydrated milk 33# (alkylaryl polyoxyethylene polyoxypropylene ether), span series (sorbitan monostearate), Tween series (sorbitan fatty acid ester polyoxyethylene ether) or AEO series (fatty alcohol polyoxyethylene ether) A mixture of seed constituents;

Further, the dispersing agent is selected from one or a mixture of a plurality of polycarboxylate, lignosulfonate, alkylphenol polyoxyethylene formaldehyde condensate sulfate, calcium alkylbenzene sulfonate, naphthalene sulfonic acid formaldehyde condensate sodium salt, alkylphenol polyoxyethylene, fatty amine polyoxyethylene, fatty acid polyoxyethylene or glycerol fatty acid ester polyoxyethylene;

further, the wetting agent is selected from one or a mixture of more of sodium dodecyl sulfate, sodium dodecyl benzene sulfonate, nekal BX, wetting penetrant F, Chinese honeylocust fruit powder, silkworm excrement or soapberry powder;

further, the penetrating agent is selected from a mixture consisting of one or more of penetrating agent JFC (fatty alcohol-polyoxyethylene ether), penetrating agent T (diisooctyl maleate sulfonate), azone or organic silicon;

further, the antifreezing agent is a mixture consisting of one or more of ethylene glycol, propylene glycol, glycerol or urea;

further, the thickening agent is selected from one or more of xanthan gum, polyvinyl alcohol, bentonite, carboxymethyl cellulose or magnesium aluminum silicate;

further, the stabilizer is selected from one or more of epoxidized soybean oil, epichlorohydrin, BHT, ethyl acetate and triphenyl phosphate;

Further, the disintegrating agent is selected from one or more of bentonite, urea, ammonium sulfate, aluminum chloride, low-substituted hydroxypropyl cellulose, lactose, citric acid, succinic acid or sodium bicarbonate;

further, the defoaming agent is selected from silicone oil, silicone compounds and C₁₀～C₂₀Saturated fatty acids or C₈～C₁₀One or more of fatty alcohol compounds;

all of the above are commercially available.

Further, the composition may be formulated into a pesticidally acceptable formulation, including solid formulations, liquid formulations, seed treatment formulations, other formulations, according to methods well known to those skilled in the art;

further, the solid preparation is powder, dispersible tablets, granules, soluble powder, soluble granules, soluble tablets, milk powder, milk granules, water dispersible granules, wettable powder, micro-capsule granules, powder, macro-granules and water dispersible tablets;

further, the liquid preparation is microcapsule suspending agent, dispersible agent, missible oil, emulsion granules, oil emulsion, emulsion powder, aqueous emulsion, microemulsion, dispersible oil suspending agent, oil dispersion powder, suspending agent, suspoemulsion, soluble solution and ultra-low volume liquid;

Further, the seed treatment preparation is a suspended seed coating agent, a seed treatment dry powder agent, a seed treatment dispersible powder agent, a seed treatment suspending agent and a seed treatment liquid agent;

further, the other preparations are bait, concentrated bait, gas preparation, aerosol, smoke agent;

furthermore, the preparation formulation is preferably wettable powder, water dispersible granules, suspending agents and aqueous emulsion;

further, the composition is prepared into wettable powder, and the components and the content of the wettable powder are preferably as follows: fluxapyroxad aniline 0.1-80 wt%, fluroxypyr 0.1-80 wt%, dispersant 2-10 wt%, wetting agent 2-10 wt% and stuffing for the rest;

further, the composition is prepared into water dispersible granules, and the components and the content of the water dispersible granules are preferably as follows: fluxapyroxad aniline 0.1-80 wt%, fluroxypyr 0.1-80 wt%, dispersant 3-12 wt%, wetting agent 1-8 wt%, disintegrating agent 1-10 wt% and stuffing for the rest;

further, the composition is prepared into a suspending agent, and the components and the content of the suspending agent are preferably as follows: 0.1-80% of penflufen, 0.1-80% of fluroxypyr, 2-10% of dispersant, 2-10% of wetting agent, 0.01-2% of defoaming agent, 0-2% of thickening agent, 0-8% of antifreeze agent and the balance of deionized water;

Further, the composition is prepared into an aqueous emulsion, and the components and the content of the composition are preferably as follows: 0.1 to 80 percent of penflufen, 0.1 to 80 percent of fluroxypyr, 10 to 25 percent of solvent, 5 to 15 percent of emulsifier and the balance of deionized water.

The invention has the advantages that: 1) the composition has good synergy and lasting effect within a certain range, and the control effect is higher than that of a single agent; 2) the dosage of the pesticide is reduced, the residue of the pesticide on crops can be reduced, and the environmental pollution is reduced.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more concise and clear, the present invention is described with the following specific embodiments, but the present invention is by no means limited to these embodiments. The following described examples are only preferred embodiments of the present invention, which can be used to describe 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.

Preparation of the preparation

Example 1: 20% fluxapyroxad aniline chlorofluoroether myclobutanil wettable powder (2:3)

The formula is as follows: 8% of penflufen, 12% of fluroxypyr, 4% of lignosulfonate, 3% of fatty alcohol polyoxyethylene ether, 6% of sodium dodecyl benzene sulfonate, 1% of sodium lauryl sulfate and the balance of kaolin;

The preparation method comprises the following steps: the penflufen and the fluroxypyr are uniformly mixed with the dispersant, the wetting agent and the filler, and then are uniformly mixed in a mixing cylinder, and are uniformly mixed again after being crushed by a jet mill, so that the wettable powder disclosed by the invention can be prepared.

Example 2 wettable powder of 30% penflufen-fluroxypyr (1:1)

The formula is as follows: 15% of penflufen, 15% of fluroxypyr, 2% of octylphenol polyoxyethylene ether, 3% of alkylphenol polyoxyethylene ether, 3% of nekal, 2% of sodium dodecyl sulfate and the balance of white carbon black;

the preparation method comprises the following steps: the same as in example 1.

Example 3: 25% penflufen-fluroxypyr water dispersible granule (3:2)

The formula is as follows: 15% of fluxapyroxad aniline, 10% of chlorofluoromethane, 2% of alkyl naphthalene sulfonate formaldehyde, 3% of lignosulfonate, 3% of sodium dodecyl sulfate, 2% of sodium lauryl sulfate, 2% of hydroxyethyl cellulose, 2% of magnesium aluminum silicate, 2% of sodium carbonate, 2% of bentonite and the balance of kaolin;

the preparation method comprises the following steps: the penflufen, the cloroxen, the dispersant, the wetting agent, the disintegrant and the filler are crushed by air flow to obtain corresponding grain diameters to form semi-finished products, and the semi-finished products are sent into a fluidized bed granulation dryer to be dried by a granulator to obtain the water dispersible granule of the invention.

Example 4 20% Fluxapyroxafen Chlorofloxacin Water dispersible granule (1:1)

The formula is as follows: 10% of penflufen, 10% of fluroxypyr, 5% of sodium lignin sulfonate, 2.5% of sodium dodecyl sulfate, 5% of urea, 5% of white carbon black and the balance of kaolin;

the preparation method comprises the following steps: the same as in example 3.

Example 5: 30% penflufen-fluroxypyr suspension (1:5)

The formula is as follows: 5% of penflufen, 25% of fluroxypyr, 4% of polyoxyethylene polyoxypropylene ether, 1.5% of sodium lignosulfonate, 0.25% of xanthan gum, 1.5% of magnesium aluminum silicate, 1% of sodium benzoate, 3% of propylene glycol, 0.5% of silicone oil and the balance of deionized water;

the preparation method comprises the following steps: according to the formula, water, a dispersing agent and a wetting agent are uniformly mixed, a defoaming agent and an anti-freezing agent are sequentially added under the stirring state, the materials are uniformly sheared and mixed at a high speed, fluxapyroxad and chlorofluoroether bacteria azole are added, the materials are continuously sheared and uniformly mixed, then the materials are ground in a horizontal sand mill, the particle size of the materials is enabled to be below 5um, a thickening agent is added, and the materials are sheared uniformly to obtain the suspending agent.

Example 6: 15% penflufen-fluroxypyr suspension (1:2)

The formula is as follows: 5% of penflufen, 10% of fluroxypyr, 3% of sodium polycarboxylate, 4% of sodium lignosulfonate, 3% of sodium lauryl sulfate, 2% of sodium dodecyl sulfate, 4% of diethyl ether diglycol, 2% of glycerol, 2% of organosilicon, 1% of silicone oil, 1% of gelatin, 3% of xanthan gum and the balance of deionized water;

The preparation method comprises the following steps: the same as in example 5.

Example 7: 10% Fluxapyroxad aniline chlorofluoroether ipconazole water emulsion (1:1)

The formula is as follows: 5% of penflufen, 5% of fluroxypyr, 2% of methyl oleate, 3% of phenyl phenol polyoxyethylene ether, 3% of triethanolamine, 3% of propylene glycol, 3% of glycerol, 2% of sodium acrylate, 1% of sodium alginate, 3% of organic silicon and the balance of deionized water;

the preparation method comprises the following steps: the preparation method comprises the steps of adding fluxapyroxad, chlorofluoromethane, a solvent, an emulsifier and the like into a whole, and uniformly mixing the mixture under high-speed stirring to obtain the aqueous emulsion.

Example 8 Fluxapyroxafen Chlorofloxacin aqueous emulsion 20% (1:9)

The formula is as follows: 2% of penflufen, 18% of fluroxypyr, 3% of corn oil, 2% of phenylphenol polyoxyethylene ether, 3% of triethanolamine, 3% of glycerol, 2% of sodium acrylate, 3% of diethyl ether diglycol, 2% of polyvinyl alcohol and the balance of deionized water;

the preparation method comprises the following steps: the same as in example 7.

Indoor activity

Example 9: combined action of penflufen and fluroxypyr in mixing on rice sheath blight disease

The test basis is as follows: NY/T1156.5-2006 "indoor bioassay of pesticides test guidelines part 5: broad bean leaf method for inhibiting rice sheath blight bacteria test, NY/T1156.6-2006 agricultural chemical indoor bioassay test criteria fungicide part 6: combined action assay of compounding.

Reagent to be tested: 95% of penflufen and 97% of fluroxypyr are provided by the research and development center of the Heliel pharmaceutical industry group, Inc.

Test targets: rhizoctonia solani (Rhizoctonia solani).

Preparing a test material: selecting broad bean susceptible varieties, shearing leaves with the same parts, consistent growth vigor and petioles, and placing the leaves in a culture dish for moisture preservation for later use.

Preparation of the medicament: the two raw materials are dissolved by acetone, diluted by 0.05 percent of Tween 80 aqueous solution and set into 5 series of mass concentrations.

Medicament treatment: the side of the fungus cake with hypha and diameter of 5mm was inoculated to the center of the treated leaf. Inoculating 30 leaves in each treatment, inoculating pathogenic bacteria to the leaves for 24 hr, soaking in the prepared liquid medicine for 5s, draining off excessive liquid medicine, air drying, labeling, and culturing under moisture. Each treatment was repeated 4 times and a blank was set. The leaves are placed in a constant temperature box and a lighting moisture preservation box for cultivation.

Data investigation: the length and width of the lesion at each inoculation site were recorded by caliper measurement 7 days after the treatment with the lesion diameter (in mm) being expressed as the average of the length and width.

Data statistics and analysis:

control effect (%) [ (blank control lesion diameter-lesion diameter treated with drug)/blank control lesion diameter ] × 100

The chlorofluoromethrizole is used as a standard medicament, and the toxicity index is 100.

Measured virulence index (ATI) of the combination₅₀Measured EC of x 100/blend₅₀

Theoretical virulence index (TTI) of the combination (virulence index of compound a alone x percent of compound a + virulence index of compound B alone x percent of compound B)/(percent of compound a + percent of compound B)

Co-toxicity coefficient (CTC) ═ ATI/TTI × 100

According to the Sun cloud Peel method: the co-toxicity coefficient (CTC) is more than or equal to 120, which is a synergistic effect; the co-toxicity coefficient (CTC) is less than or equal to 80 and is used as antagonism; a co-toxicity coefficient (CTC) of between 80 and 120 is additive.

The test results are shown in table 1:

TABLE 1 indoor Activity test of penflufen and Chlorofloxacin on Rice sheath blight disease

As shown in the indoor activity test (see Table 1), the blending of penflufen and fluroxypyr has the effect of treating rice sheath blight EC₅₀0.6472mg/L and 0.4165mg/L respectively, and the rice sheath blight is sensitive to the cloflufen-methyl; the co-toxicity coefficients of penflufen and fluroxypyr in the mixture ratio of 1:20, 1:10, 1:5, 1:3, 1:2, 1:1, 2:1, 3:1, 5:1, 10:1 and 20:1 are all more than 120, and the penflufen and fluroxypyr have synergistic effect on rice sheath blightActing; after the penflufen and the fluroxypyr are mixed according to the mixture ratio of 1:3, 1:2, 1:1, 2:1, 3:1 and 5:1, the cotoxicity coefficient is more than 160, and the penflufen and the fluroxypyr have obvious synergistic effect on rice sheath blight; after the penflufen and the fluroxypyr are mixed according to the proportion of 1:1, the cotoxicity coefficient is 208.59, and the synergistic effect is most obvious.

Pesticide effect in field

Example 10: fluxapyroxad and fluroxypyr are mixed to prevent and treat rice sheath blight in field

The test field is selected in Yangzhou rice transplanting field of Jiangsu, the fertilizer and water management is consistent, and the rice grows uniformly when the fertilizer is applied. 30 percent of fluxapyroxad aniline chlorofluoroether (triflumizole) oxazole suspending agent (1:1) prepared in a laboratory is used according to the effective component dosage of 30g/hm²、45g/hm²、60g/hm²Uniformly spraying at the tillering stage of rice, applying the pesticide for the first time in 7 months and 12 days in 2018, and applying the pesticide for the second time at intervals of 7 days (7 months and 19 days); the contrast medicament is 22.4 percent of the dosage of the effective component of the penflufen suspending agent which is 45g/hm²15% of effective component dosage of the fluroxypyr water dispersible granule is 45g/hm²150g/hm of local conventional medicament 250g/L azoxystrobin suspending agent²And spraying clear water to the blank control.

The test preparation is according to GB/T17980.20-2000 pesticide field efficacy test criteria: the bactericide is used for preventing and treating rice sheath blight. The field efficacy investigation was conducted 7 days and 14 days after the second application. Grading according to the degree of harmful symptoms of rice leaf sheaths and leaves. Taking plants as a unit, sampling at 5 points by adopting a diagonal line, surveying 5 clusters at each point for 25 clusters, recording the total plant number, the disease plant number and each disease stage number, and calculating the disease plant rate, the disease plant rate control effect and the disease finger and disease finger control effect.

Grading the disease condition standard:

level 0: the whole plant is disease-free; level 1: the disease of the 4 th leaf and the leaf sheaths and leaves below; and 3, level: the disease of the 3 rd leaf and the following leaf sheaths and leaves; and 5, stage: the disease of the 2 nd leaf and the leaf sheaths and leaves below; and 7, stage: the scabies of the scabies and the scabies of the leaves below the scabies; and 9, stage: the disease is caused by the whole plant and died in advance.

Calculating the formula:

disease rate (%) ═ 100 x disease number of plants/total number of investigated plants;

disease index [ Σ (number of diseased plants at each stage × number of relative stage)/(total number of investigated plants × 9) ] × 100

The preventing and treating effect (%) is [ (disease index after blank group application-disease index after treatment group application)/disease index after blank group application ] × 100

Security survey

During the test period, the crops are observed whether the phytotoxicity symptoms exist, the phytotoxicity degree is recorded if the phytotoxicity exists, the phytotoxicity symptoms (dwarfing, chlorosis, malformation and the like) of the crops are accurately described, and in addition, the beneficial effects on the crops are recorded.

TABLE 2 Fluxapyroxad and Chlorofloxacin to prevent and treat rice sheath blight

The field efficacy showed (see table 2): under the same environmental conditions, the field effect of each treatment is 64.75-87.75% after different treatments are used for preventing and controlling the rice sheath blight for 7 days. 30g/hm after 30% of penflufen-fluroxypyr suspension concentrate is sprayed for 7 days ²、45g/hm²、60g/hm²The control effect of the three different dosages on the rice sheath blight disease is different, wherein the control effect is 74.70%, 80.00% and 82.66%, the control effect is superior to or obviously superior to that of a single dosage and a local conventional medicament, and the dosage is 60g/hm²The control effect is best. The field effect is 59.01-89.32% after 14 days after the pesticide application, 30g/hm after 30% of fluxapyroxad-fluroxypyr suspension is sprayed for 14 days²、45g/hm²、60g/hm²The control effect of the three different dosages of the rice sheath blight disease is different, wherein the control effect is 75.97%, 83.94% and 88.61%, and the control effect is obviously superior to that of a single dose and that of a local conventional medicament.

Example 11: fluxapyroxad aniline and fluroxypyr are mixed to prevent and treat cucumber powdery mildew field drug effect

Test site: the test bases are a test base of Shouguanshi of Shandong province and a test base of Mitsui of Hainan province.

Test agents: 30% of fluxapyroxad aniline chlorofluoroether bacteria azole suspending agent (1:1) and clear water as a reference.

Test targets: cucumber powdery mildew (sphaerothecafeuliginea).

The test agents and dosages are detailed in table 3. A blank control was also set, and the cells were randomly arranged at 20m2 per cell for each 4 replicates of treatment. The spraying agent is uniformly sprayed on the front and back surfaces of the blade by a conventional spraying method.

The investigation and statistical method comprises the following steps: the disease condition was examined before administration, and 10 days and 14 days after administration. Four points are randomly selected in each cell, all leaves of 5 plants are investigated in each point, and each leaf accounts for the percentage of the area of the leaf according to the scab.

The grading method comprises the following steps:

level 0: no disease spots;

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 10 percent of the whole leaf area;

and 5, stage: the lesion area accounts for 11 to 20 percent of the whole leaf area;

and 7, stage: the lesion area accounts for 21 to 40 percent of the whole leaf area;

and 9, stage: the lesion area accounts for more than 40% of the whole leaf area.

Disease rate (%) ═ 100 x disease number of plants/total number of investigated plants;

disease index [ Σ (number of diseased plants at each stage × number of relative stage)/(total number of investigated plants × 9) ] × 100

The preventing and treating effect (%) is [ (disease index after blank group application-disease index after treatment group application)/disease index after blank group application ] × 100

And (3) test results:

TABLE 3 Fluxapyroxad and Chlorofloxacin to prevent and treat powdery mildew of cucumber

The field efficacy showed (see table 3): under the same environmental conditions, the field effect of each treatment is integrally prevented after different treatments are used for preventing and controlling cucumber powdery mildew for 3 daysThe effect is 67.34% -85.33%. After 30% of fluxapyroxad aniline and chlorofluoroether bacterium azole suspending agent is sprayed for 10 days, 40g/hm²、65g/hm²、90g/hm²The control effect of the three different dosages on the rice sheath blight disease is different, namely 77.72 percent, 80.05 percent and 85.33 percent, which are respectively superior or obviously superior to that of a single dosage and a local conventional medicament, wherein the dosage is 90g/hm ²The control effect is best. The field effect is 71.23-88.68% after 14 days after the pesticide is applied, 40g/hm after 30% of fluxapyroxad aniline-chlorofluoroether bacteria suspension is sprayed for 14 days²、65g/hm²、90g/hm²The control effect of the three different dosages of the pesticide on the rice sheath blight disease is different, namely 80.99%, 83.87% and 88.68%, and the pesticide is obviously superior to a single dose and a local conventional pesticide.

Claims (9)

1. The bactericidal composition containing penflufen and fluroxypyr is characterized in that the effective components contain penflufen serving as an active ingredient and fluroxypyr serving as an active ingredient.

2. The bactericidal composition according to claim 1, wherein the mass ratio of the fluxapyroxad as an active ingredient to the fluroxypyr as an active ingredient is 1:80 to 80: 1.

3. The bactericidal composition according to claim 1, wherein the mass ratio of the fluxapyroxad as an active ingredient to the fluroxypyr as an active ingredient is 1:50 to 50: 1.

4. The bactericidal composition according to claim 1, wherein the mass ratio of the fluxapyroxad as an active ingredient to the fluroxypyr as an active ingredient is 1:20 to 20: 1.

5. The bactericidal composition according to claim 1, wherein the mass ratio of the fluxapyroxad as an active ingredient to the fluroxypyr as an active ingredient is 1:3 to 5: 1.

6. The bactericidal composition of claim 1, wherein the sum of the active ingredients fluxapyroxad and fluroxypyr is 1% to 90%, preferably 10% to 50% by weight of the composition.

7. The bactericidal composition according to any one of claims 1 to 6, wherein the composition further comprises an auxiliary pesticide component in addition to the active ingredient.

8. The bactericidal composition of claim 7, wherein the composition is formulated into an agriculturally acceptable formulation, including any one of powders, dispersible tablets, granules, soluble powders, soluble granules, soluble tablets, emulsion powders, emulsion granules, water dispersible granules, wettable powders, microcapsule granules, powders, macrogranules, water dispersible tablets, microcapsule suspensions, dispersible solutions, emulsifiable concentrates, emulsion granules, oil emulsions, emulsion powders, aqueous emulsions, microemulsions, oil dispersible powders, suspensions, suspoemulsions, soluble solutions, ultra-low volume liquids, suspended seed coatings, dry seed treatment powders, dispersible seed treatment powders, seed treatment suspensions, seed treatment liquids; the preferable preparation formulation is wettable powder, water dispersible granules, suspending agent and aqueous emulsion.

9. The use of the fungicidal composition according to claim 8 for controlling diseases on agricultural crops.