CN102258023A - Sterilizing composition containing fludioxonil and metalaxyl - Google Patents
Sterilizing composition containing fludioxonil and metalaxyl Download PDFInfo
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- CN102258023A CN102258023A CN2010101953389A CN201010195338A CN102258023A CN 102258023 A CN102258023 A CN 102258023A CN 2010101953389 A CN2010101953389 A CN 2010101953389A CN 201010195338 A CN201010195338 A CN 201010195338A CN 102258023 A CN102258023 A CN 102258023A
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- metalaxyl
- fludioxonil
- bactericidal composition
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- sterilizing composition
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Abstract
The invention discloses a sterilizing composition containing fludioxonil and metalaxyl, a preparation method thereof, and an application thereof. The sterilizing composition is characterized in that: the sterilizing composition comprises fludioxonil, metalaxyl, and other auxiliary agents. A weight ratio of fludioxonil to metalaxyl is 70:1-1:60. The sterilizing composition can be used for controlling paddy rice blast. The sterilizing composition has advantages of low cost and good effect. No report about fludioxonil and metalaxyl blending is found home or abroad. Therefore, the invention is provided.
Description
Technical field
The invention belongs to the agriculture chemical compounding field, relate to a kind of bactericidal composition, especially a kind of is that the bactericidal composition of main active component and this bactericidal composition thereof are in application in agriculture with fludioxonil and metalaxyl.
Background technology
Using chemical agent is the most effectively means of controlling plant diseases.But long-term use single chemical bactericide continuously high dose, cause problems such as residual, the environmental pollution of medicament and anti-pesticide resistance fungi development easily.Reasonably chemical bactericide is composite or be mixed and have the expansion fungicidal spectrum, improve control efficiency, prolong the optimum period for applying fertilizer, reduce dosage, reduce poisoning, reduce residual, delay fungi drug resistance and positive characteristics such as drug-fast generation and development, bactericide compounded is one of the effective method the most that addresses the above problem.Exploitation new product bactericide price is constantly soaring, and by contrast, exploitation is efficient with research, low toxicity, low-residual composite be mixed have small investment, the lead time is short and be subjected to domestic and international attention, strengthens the development dynamics one after another.
Fludioxonil:
The mechanism of action mainly suppresses the relevant transfer of glucose phosphorylated with characteristics, and suppresses the growth of fungal mycelium, finally causes germ death, because of mechanism of action uniqueness, so do not have cross resistance with existing biocide agent.Active ingredient does not move in soil, thereby forms a stable and lasting guard circle around dispenser.Lasting period was more than 4 months.
Metalaxyl:
The tasteless crystal of white, fusing point 71.8-72.3 ℃, vapour pressure 0.75mPa (25 ℃), density 1.20 (20 ℃), KowlogP=1.75 (distilled water, 25 ℃), solvability water 8.4g/l (22 ℃), ethanol 400, acetone 450, toluene 340, n-hexane 11, n-octyl alcohol 68 (g/L, 25 ℃), stable below 300 ℃, in neutrality, the acid medium stable (room temperature).The systemic fungicide of tool protection and therapeutic action; can be absorbed by the root of plant, stem, leaf, and transfer to each organ of plant, can do the cauline leaf processing with moisture content in the plant corpus; seed treatment and soil treatment are effective to downy mildew, phytophthora, the caused disease of pythium spp.
Summary of the invention
The objective of the invention is at the problems referred to above,, thereby provide a kind of bactericidal composition of preventing and treating the various crop fungal disease for pesticide resistance, enhancing drug effect, the reduction drug cost that overcomes and delay existing agricultural chemicals.
A further object of the invention provides the purposes of this bactericidal composition.
Measure of the present invention realizes by following measures.
A kind of bactericidal composition, it contains fludioxonil and metalaxyl, and wherein the weight ratio of fludioxonil and metalaxyl is 70: 1~1: 60.
Described bactericidal composition, wherein the more excellent weight ratio of fludioxonil and metalaxyl is 50: 3~1: 40.
Described bactericidal composition, wherein to accumulate the weight ratio of shared preparation be 2~71% to two kinds of active principles of fludioxonil and metalaxyl.
Described bactericidal composition, fludioxonil and metalaxyl and auxiliary agent, carrier etc. are processed into any one formulation that allows on the agricultural chemicals.
Described bactericidal composition is characterized in that the formulation that can be processed into is suspending agent, wetting powder, water dispersible granules and microcapsule formulations etc.
Described bactericidal composition is used to prevent and treat the multiple fungal disease of various crop.
Microbicide compositions with synergistic effect takes following measure to realize:
One of technical scheme of the present invention, described bactericidal composition are suspending agent, and the percentage by weight of component is:
Fludioxonil 1~70%
Metalaxyl 1~80%
Dispersant 5~20%
Antifreezing agent 0.5~3%
Thickener 0.1~2%
Defoamer 0.1~0.8%
Water surplus
The concrete production stage of this bactericidal composition suspending agent is earlier other auxiliary agents to be mixed, mix through high speed shear, add fludioxonil and metalaxyl, abrading-ball is 2~3 hours in ball crusher, make a diameter all below 5mm, make the suspending agent preparation that contains the bactericidal composition of fludioxonil and metalaxyl of the present invention.
Two of technical scheme of the present invention, described bactericidal composition are wetting powder, and the percentage by weight of component is:
Fludioxonil 1~70%
Metalaxyl 1~80%
Dispersant 3~20%
Wetting agent 3~10%
Filler 10~70%
The concrete procedure of processing of this bactericidal composition wetting powder is: press above-mentioned prescription with fludioxonil and metalaxyl and dispersant, wetting agent and filler mixing, in stirred tank, evenly stir, behind airslide disintegrating mill, mixing, promptly can be made into the wetting powder of the present composition.
Three of technical scheme of the present invention, described bactericidal composition are water dispersible granules, and the percentage by weight of component is:
Fludioxonil 1~70%
Metalaxyl 1~80%
Dispersant 3~20%
Wetting agent 3~10%
Disintegrant 2~5%
Filler 10~70%
The concrete procedure of processing of this bactericidal composition water dispersible granules is: by above-mentioned prescription fludioxonil, metalaxyl and dispersant, wetting agent, disintegrant and filler are mixed, pulverize with micro jet, through mediating, add then and carry out granulation, drying, screening in the fluidized bed prilling dryer after sample analysis makes the water dispersible granules that contains the bactericidal composition of fludioxonil and metalaxyl of the present invention.
Four of technical scheme of the present invention, described bactericidal composition are microcapsule formulations, and the percentage by weight of component is:
Fludioxonil 1~70%
Metalaxyl 1~80%
Urea 5~20%
Formaldehyde 5~20%
Emulsifying dispersant 5~20%
Antifreezing agent 1~5%
Thickener 0.1~2%
Defoamer 0.1~0.8%
Water surplus
This bactericidal composition microcapsule formulations procedure of processing is: add urea and formaldehyde (amount of substance ratio be about 1: 1.5~2.0) in the there-necked flask of agitating device is housed, about pH value to 8~9 with the sodium hydroxide solution regulator solution, be warming up to 70~80 ℃ then, reaction obtains stable urea resin prepolymer.The former medicine of getting a certain amount of fludioxonil and metalaxyl is dissolved in the cyclohexane, and adds emulsifying dispersant in solution, follows vigorous stirring, and being made into the aqueous solution that contains emulsifying dispersant is the O/W type stable emulsion of water.Above-mentioned urea resin prepolymer is added in the emulsion, regulate the pH value, polymerization reaction take place under the acid catalysis condition is wrapped oil phase substance, forms microcapsule granule.Slowly heat up, solidify, temperature is controlled at 40~50 ℃, hardening time 1h.Select to add an amount of auxiliary agent, the microcapsule suspending agent that gets final product stablely.
Described emulsifier is selected from any one or more mixtures formed with arbitrary proportion in calcium dodecyl benzene sulfonate and aliphatic acid polyethenoxy ether, alkylphenol polyoxyethylene sulfosuccinate, styryl phenol APEO, polyoxyethylene nonylphenol ether, castor oil polyoxyethylene ether, aliphatic acid polyethenoxy base ester, the polyoxyethylene aliphatic alcohol ether.
Described dispersant is selected from one or more in polycarboxylate, sodium lignin sulfonate, alkylphenol polyoxyethylene formaldehyde condensation products sulphate, alkyl benzene sulfonate calcium salt, naphthalene sulfonic acid-formaldehyde condensation product sodium salt, alkylphenol polyoxyethylene, aliphatic acid polyethenoxy ether, polyoxyethylene carboxylate, the fatty acid glyceride APEO.
Described wetting agent is selected from: one or more in lauryl sodium sulfate, calcium dodecyl benzene sulfonate, Nekal BX, wetting and penetrating agent F, alkylnaphthalene sulfonate, alkylphenol ethoxylate, polyoxyethylene triphenylethylene phosphenylic acid salt, spaonin powder, silkworm excrement, the soapberry powder.
Described synergist is meant to have the medicament of enhancing penetration, wetting extended capability, knock down insect speed, improve the resistance of rainwater washing against power of agricultural chemicals, thereby improve a class safety, environmental protection of agricultural insecticide, bactericidal effect, the New-type adjuvant of nontoxic, noresidue, optional in organic silicon pesticide synergist ZC-650 or organic silicon pesticide bleeding agent spreading agent Agrowet810c, agricultural organic silicon pesticide synergist Silwet408, azone any.
Described disintegrant is selected from: one or more in bentonite, urea, ammonium sulfate, aluminium chloride, citric acid, succinic acid, the sodium bicarbonate.
Described thickener is selected from: one or more in xanthans, CMC, hydroxyethylcellulose, methylcellulose, Magnesiumaluminumsilicate, the polyvinyl alcohol.
Described antifreeze is selected from: one or more in ethylene glycol, propane diols, glycerine, diethylene glycol (DEG), the triethylene glycol.
Described defoamer is selected from: silicone oil, silicone compound, C
10-20Saturated fat acid compounds, C
8-10In aliphatic alcohols compound and the polyoxyethylene glycerol ether one or more.
Described emulsifying dispersant comprises: wetting agent, dispersant, stabilizing agent, thickener, defoamer and antifreezing agent etc.
Described filler is selected from: one or more in kaolin, diatomite, bentonite, attapulgite, white carbon, starch, the precipitated calcium carbonate.
The invention has the beneficial effects as follows:
1, the used fludioxonil of the present invention is the mycelium synthetic inhibitor; mechanism of action uniqueness; metalaxyl is that the protection with interior absorption adds the curative fungicide agent; have very strong interior absorption, the two mechanism of action difference, being mixed mutually can not produce conflict; through evidence; but Synergistic reduces dosage, reduces cost.At present fludioxonil and metalaxyl composite do not have report as yet.
2, two kinds of composite bactericide have double action mechanism, delay the drug-fast generation of germ.
3, reduced the agricultural chemicals usage amount, strengthened friendly environment.
Embodiment: fludioxonil and metalaxyl composite
1 materials and methods
1.1 test material
1.1.1 reagent agent
The former medicine of 95.8% fludioxonil is produced by Shaanxi Heng Run chemical industry Co., Ltd; The former medicine of 98% metalaxyl, GuangDong LiWei Chemical Engineering Co., Ltd produces;
1.1.2 for the examination pathogen
The cucumber root rot bacterium, green house is gathered the disease leaf in Shouguang, Shandong, and the separation and purification gained is cultivated preservation in 4 ℃ of refrigerators on the PDA inclined-plane.
1.1.3 for the examination medium
PDA medium: potato 200g, glucose 20g, agar 20g, water 1000ml
1.2 test method and synergistic effect are measured
1.2.1 two kinds of single agent are to the toxicity test of sheath blight fungus
Former medicine of 95.8% fludioxonil and the former medicine of 98% metalaxyl all are made into the mother liquor of 10000 μ g/ml with dissolve with methanol, preserve in 4 ℃ of following low temperature, and be stand-by.The Tween 80 aqueous solution with 0.1% before the test is diluted to 5 ~ 6 series concentration.
At first be the preparation of bacterial classification and bacterium cake: under the sterile working, the cucumber root rot bacterium is seeded on the PDA medium,, cultivates after 4 days in the mold incubator of RH80% at 25 ℃, with the diameter of sterilization is that the card punch of 0.5cm is beaten at colony edge and got bacterium cake number piece, standby.
Next is the preparation of toxic medium: under the sterile working, accurately measuring the soup that configures successively with liquid-transfering gun from the low concentration to the high concentration adds and has melted and be cooled in the medium about 45 ℃, pouring sterilized diameter after mixing into is the interior condensation of culture dish of 9cm, each handles triplicate, not contain medicament is contrast, finally makes the toxic flat board that contains the variable concentrations soup.
Be that soup is handled at last: under the sterile working, the bacterium cake is moved to toxic dull and stereotyped central authorities, face down places 25 ℃ of incubators to cultivate 4d, when control strain colony diameter length is above to 6.5cm, adopts " right-angled intersection method " to measure.According to the linear regression analysis between the logarithm value of the probit value of inhibiting rate and medicine series concentration, obtain the EC that two kinds of single agent suppress mycelial growths
50Value, correlation coefficient and virulence regression equation.
On the basis of preliminary experiment, respectively single agent fludioxonil and metalaxyl are carried out toxicity test in order to last method, the two EC
50Value is respectively 0.12mg/l and 0.18mg/l.
Combination is provided with 1.2.2 be mixed
50% fludioxonil metalaxyl mass ratio was respectively 1: 3,1: 2,1: 1,2: 1,3: 1, i.e. 12.5%+37.5%, 16.67%+33.33%, 25%+25%, 33.33%+16.67%, 37.5%+12.5% totally 5 combinations that are mixed.
1.2.3 mixture toxicity test
Carry out the toxicity test of mixture according to mixed ratio with single agent toxicity test method.
EC that each that will measure according to the abundant method of Sun Yun handled
50Value is converted into the actual toxicity index (ATI) of using with; According to the proportioning of mixture, obtain theory and use toxicity index (TTI) with, calculate the co-toxicity coefficient (CTC) of mixture by following formula.
Single agent toxicity index=(standard medicament EC
50/ reagent agent EC
50) * 100
ATI=(standard medicament EC
50/ reagent agent (using with) EC
50) * 100
The content (%) of toxicity index X B in using with of content (the %)+B of the toxicity index x A of TII=A in using with
CTC=(ATI/TTI)×100
If co-toxicity coefficient is big by 120, showing has synergistic effect; If be starkly lower than 100 (below 80), be indicated as antagonism; Between 100~120, be indicated as summation action
Data see Table 1
The composite virulence of table 1 fludioxonil and metalaxyl to the cucumber root rot bacterium
The composite co-toxicity of table 2 fludioxonil and metalaxyl to the cucumber root rot bacterium
2 results and analysis
According to bactericide joint toxicity measuring result, fludioxonil and metalaxyl mass ratio are that 1: 2 o'clock co-toxicity coefficient is 129.4, and be obviously big by 120, shows as synergistic effect, thinks that fludioxonil and metalaxyl mass ratio are best proportioning at 1: 2.
3 field trials are measured the control efficiency to cucumber root rot and root rot
3.1 field trial is measured the control efficiency to cucumber root rot
3.1.1 application method
Adopt and irritate the root test: select root rot that plot relatively uniformly takes place, at the pathogenetic initial stage of root-rot, every kind of medicament is established 3 variable concentrations, is contrast to irritate clear water, and every processing repeats 4 times, and 100 strains are irritated in every sub-district, every strain perfusion liquid 250ml.
3.1.2 investigation method
Every sub-district takes disease plant immediately and is not less than 30 strains, writes down total strain number and diseased plant number at different levels.
The root rot grade scale
0 grade: plants stems base portion and main root all do not have scab;
1 grade: plants stems base portion and main root have a small amount of scab;
3 grades: basal part of stem or main root scab are more, and lesion area accounts for 1/4~1/2 of the stem and the root gross area;
5 grades: basal part of stem or main root scab are more and bigger, and lesion area accounts for 1/2~3/4 of the stem and the root gross area;
7 grades: basal part of stem or main root scab form in flakes around the stem phenomenon, but root system is not dead;
9 grades: here root system necrosis, above-ground plant parts are withered or are dead.
3.1.3 control time and number of times
This test is investigated 4 times altogether, disease index before the investigation medicine before dispenser respectively, and each investigation of 10 days, 30 days and 60 days is once after the dispenser.
3.1.4 drug effect computational methods
Disease index=∑ (diseased plant numbers at different levels * relative level numerical value)/(investigating total strain number * 9) * 100
3.1.5 result of the test and analysis
Each handles the effect of control cucumber root rot table 3
Interpretation of result:
As can be seen from Table 3, the effect of 1: 2 the combination control cucumber root rot that is mixed of 50% fludioxonil metalaxyl wetting powder is remarkable.Every mu under same dosage, the effect of complex preparation significantly is better than two kinds of single agent.Complex preparation significantly is better than effect under the low concentration consumption in control efficiency under the consumption of high concentration.Result of the test proves that 50% fludioxonil list agent effect is better than 50% metalaxyl list agent.Under rational proportion, play remarkable synergistic effect.Because adopt root-pouring method, the special role mechanism of complex preparation is brought into play drug effect gradually, the root rot of highly effective control further develops.Significant in the production practices again, it is promoted with use and answers the institute in market to ask undoubtedly.
3.2 field trial is measured the control efficiency to root rot
3.2.1 result of the test and analysis
Each handles the effect of preventing and treating root rot table 4
Interpretation of result:
As can be seen from Table 4, to prevent and treat the effect of root rot remarkable in the combination that is mixed of 50% fludioxonil metalaxyl wetting powder 1: 2.Every mu under same dosage, the effect of complex preparation significantly is better than two kinds of single agent.Complex preparation significantly is better than effect under the low concentration consumption in control efficiency under the consumption of high concentration.Result of the test proves that 50% fludioxonil list agent effect is better than 50% metalaxyl list agent.Complex preparation behind medicine 60 days, the highest control efficiency can reach about 82%, is the desirable medicament of preventing and treating root rot.
In sum, the present invention contains the sterilization combination of fludioxonil and metalaxyl, cucumber root rot and pathogen of soybean root rot there is good control efficiency, and it is to the target crop safety, compare with single agent, bactericidal composition of the present invention has long advantage of lasting period, and is easy to use, environmental pollution is few, is difficult for producing poisoning.Simultaneously, because this complex preparation contains fludioxonil, itself is tagging property bactericide, high-efficiency broad spectrum.Microbial kind biography of many cause of diseases such as sac fungi, basidiomycetes, imperfect fungus and soil-borne disease there is extraordinary preventive effect.Lasting period is long, and is difficult for and other bactericide generation cross resistance, uses wide spectrum.In view of the extremely difficult control of present root rot, bigger to causing harm of crop.So research and development of the present invention and popularization have crucial meaning to society.
Claims (5)
1. bactericidal composition, it is characterized in that: contain two kinds of active components of fludioxonil and metalaxyl, wherein the weight ratio of fludioxonil and metalaxyl is 70: 1~1: 60.
2. bactericidal composition according to claim 1 is characterized in that: the more excellent weight ratio of fludioxonil and metalaxyl is 50: 3~1: 40.
3. bactericidal composition according to claim 1 is characterized in that: the percentage by weight that fludioxonil and metalaxyl are accumulated shared preparation is 2~71%.
4. bactericidal composition according to claim 1 is characterized in that: fludioxonil and metalaxyl and auxiliary agent and cosolvent are re-dubbed any one formulation that allows on the agricultural chemicals.
5. bactericidal composition according to claim 1 is characterized in that: the formulation that can be processed into is suspending agent, wetting powder, water dispersible granules and microcapsule formulations etc.
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105994324A (en) * | 2016-08-03 | 2016-10-12 | 顾爱国 | Bactericidal composition containing pyraclostrobin, metalaxyl and fludioxonil |
CN108935477A (en) * | 2018-08-31 | 2018-12-07 | 济南仕邦农化有限公司 | A kind of suspension seed-coating agent and its application |
CN113598166A (en) * | 2021-08-13 | 2021-11-05 | 石家庄农信生物科技集团有限公司 | Bactericidal granules and preparation method and application thereof |
Citations (1)
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WO2002102148A2 (en) * | 2001-06-14 | 2002-12-27 | Syngenta Participations Ag | Composition and method for improving plant growth |
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Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2002102148A2 (en) * | 2001-06-14 | 2002-12-27 | Syngenta Participations Ag | Composition and method for improving plant growth |
Non-Patent Citations (1)
Title |
---|
BUENO JUNIOR ET AL.: "Effect of fungicides on survival of Bradyrhizobium japonicum(Semia 5019 and Semia 5079)and soybean nodulation", 《ACTA SCIENTIARUM, AGRONOMY》, vol. 25, no. 1, 31 December 2003 (2003-12-31), pages 231 - 235 * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105994324A (en) * | 2016-08-03 | 2016-10-12 | 顾爱国 | Bactericidal composition containing pyraclostrobin, metalaxyl and fludioxonil |
CN108935477A (en) * | 2018-08-31 | 2018-12-07 | 济南仕邦农化有限公司 | A kind of suspension seed-coating agent and its application |
CN113598166A (en) * | 2021-08-13 | 2021-11-05 | 石家庄农信生物科技集团有限公司 | Bactericidal granules and preparation method and application thereof |
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