CN106417313A - Bactericidal composition containing amisulbrom and fluopicolide - Google Patents
Bactericidal composition containing amisulbrom and fluopicolide Download PDFInfo
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- CN106417313A CN106417313A CN201610833451.2A CN201610833451A CN106417313A CN 106417313 A CN106417313 A CN 106417313A CN 201610833451 A CN201610833451 A CN 201610833451A CN 106417313 A CN106417313 A CN 106417313A
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- Prior art keywords
- fluopicolide
- amisulbrom
- composition
- suspending agent
- composition pesticide
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
- A01N43/64—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with three nitrogen atoms as the only ring hetero atoms
- A01N43/647—Triazoles; Hydrogenated triazoles
- A01N43/653—1,2,4-Triazoles; Hydrogenated 1,2,4-triazoles
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
- A01N43/34—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one nitrogen atom as the only ring hetero atom
- A01N43/40—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one nitrogen atom as the only ring hetero atom six-membered rings
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- Life Sciences & Earth Sciences (AREA)
- Agronomy & Crop Science (AREA)
- Pest Control & Pesticides (AREA)
- Plant Pathology (AREA)
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Dentistry (AREA)
- General Health & Medical Sciences (AREA)
- Wood Science & Technology (AREA)
- Zoology (AREA)
- Environmental Sciences (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
Abstract
The invention relates to bactericidal composition containing amisulbrom and fluopicolide. The weight ratio of the two active ingredients is 20:1-1:20, the total content of the active ingredients in a bactericide is 2%-80% in percentage by weight, preferably 5%-70%, and the remaining is auxiliaries and carriers permissible in the pesticide. The composition has a significant synergistic effect, can reduce the use rate of pesticides and is environment-friendly and safe.
Description
Technical field
The invention belongs to technical field of pesticide and in particular to be a kind of sterilization comprising amisulbrom and fluopicolide
Composition.
Background technology
Plant Oomycete disease is caused by Mastigomycotina Oomycete disease fungus infects.Oomycete fungal pathogen
Many. host range is wide, can cause the plants such as vegetables, fruit tree, flowers, forest, cotton, fiber crops, grain, oil plant and Chinese herbal medicine that disease occurs
Evil, can cause Cruciferae, Solanaceae, Curcurbitaceae, Araeceae, Liliaceae, Rutaceae, Vitaceae, pulse family, grass family, composite family,
There are various diseases, such as samping off, pythium rot, epidemic disease, cotton disease, downy mildew in hundreds of plant such as Cactaceae, Amaranthaceae, Chenopodiaceae
Disease, white blister and root-rot, stem rot, fruit corruption etc..These diseases almost happening and prevelence every year, causes very big loss.Therefore, ovum
Gammaproteobacteria disease fungus is the highly important pathogen of crop.
Amisulbrom is the triazolylsulfonamide series bactericidal agent of Japanese Nissan chemical industry Co., Ltd. research and development, this medicine
Agent has very high bactericidal activity to epidemic disease and downy mildew, and spore activity of especially germ being dissociated is very high, is one to prevent to be
Main medicament.This medicament is mainly used in prevention and control and by oomycetes subclass and deforms microbial fungal disease, to cucumber, grape downy mildew
Disease, potato, tomato late blight and capsicum epidemic disease etc. are respectively provided with preferable prevention effect.Amisulbrom is low to mammal
Poison, to nontarget organism safety.There is lasting effect strong, resistance to rainwater shower, the features such as have stablizing effect to disease.Amisulbrom
Active compound obtained interim registration in 2007 in Britain, also obtains registration in Germany, Japan, Taiwan and Korea S etc. afterwards and ratifies.To the greatest extent
Pipe amisulbrom has preferable preventive effect to Oomycete fungal disease, but its mechanism of action is single, there is resistance wind after listing
Danger, leads to preventive effect to reduce.
Fluopicolide (fluopicolide) is a kind of new pyridine amide-type systemic fungicide of Beyer Co., Ltd's exploitation,
It is mainly used in preventing and treating Oomycete cause of disease microbial disease such as downy mildew and epidemic disease etc..Fluopicolide has the effect side of uniqueness
Formula, sterilization mechanism is different from all at present known oomycetes series bactericidal agents, with other series bactericidal agent no interactions resistances, Main Function
Show bactericidal activity in cell membrane and intercellular specific proteins, all have good suppression to each Main Morphology of pathogen
Activity, and there is good lasting effect.Fluopicolide prevents and treats the special agricultural chemicals of plant Oomycete guiding principle disease, and pathogen produces anti-to it
Property speed also quickly, it is increasing that dosage be administered alone, and conventional dose compounds, and is increased year by year using resistance for many years, mesh
The front document report also not having this kind of agricultural chemicals and amisulbrom mixture.
Inventor is found by experiment that, amisulbroms different for the mechanism of action and fluopicolide are prevented and treated Oomycete class disease
Harmful is bactericide compounded, has significant synergies, and can significantly improve treatment, the prevention effect of protection, reduce cost accounting,
To crop safety.
Content of the invention
Present invention aims to the deficiencies in the prior art, provide a kind of component rationally, synergistic effect is notable, sterilized
Effect is good, and drug cost is low to be not likely to produce the resistance to the action of a drug, the agricultural bactericidal composition to crop safety；Another object of the present invention exists
It is used for preventing and treating the application of corps diseases in providing above-mentioned composition.
For solving above-mentioned technical problem, the present invention adopts the following technical scheme that：
A kind of composition pesticide it is characterised in that active component comprises amisulbrom and fluopicolide, wherein, described indazole
The weight of flusulfamide and fluopicolide is than for 1:20-20：1, preferably 3:1-1:3, more preferably 5:2、7:4.
Further, in described composition pesticide, amisulbrom and fluopicolide account for the weight of composition than for 1-90%,
It is preferably 10-70%.
Further, the composition pesticide of the present invention can be prepared by a conventional method into the formulations of pesticide processing in any
A kind of preparation, described preparation is selected from suspending agent, suspension emulsion, microemulsion, aqueous emulsion, dispersibles oil-suspending agent, wettable powder, water
In dispersible granule, oil-suspending agent, soluble granule any one.
Further, the composition of the present invention can also add other agricultural active compositions, for example bactericide, insecticide,
The agricultural active composition such as herbicide, fertilizer.
The composition of the present invention can with finished product preparation form offer be in composition each material blended it is also possible to
Unit dose form provides, and is directly mixed in proportion in bucket or tank using front, the concentration required for being then diluted to.
Compared with prior art, beneficial effects of the present invention are：（1）Single dose is compared, bactericidal composition antagonism of the present invention
Fungal disease such as samping off, epidemic disease, downy mildew, white blister have notable synergistic to act on, and overcome and delayed the resistance to the action of a drug, expanding prevention
Spectrum is hence it is evident that improve prevention effect；（2）Reduce preventing and treating recruitment, drug cost；（3）Agriculture that is alternative conventional and being also easy to produce resistance
Medicine；（4）Compared with single dose, produce and use cost reduces.
Specific embodiment
With reference to embodiment, the present invention is further illustrated, and the percentage in embodiment is all weight percentage,
But the present invention is limited to absolutely not these examples.Described below is only the preferable embodiment of the present invention, is used only for explaining the present invention, but
Can not be therefore understands that being the restriction to the scope of the claims of the present invention.It should be pointed out that all within the spirit and principles in the present invention
Any modification, equivalent or improvement of being made etc., should be included within the scope of the present invention, and therefore, the present invention is special
The protection domain of profit should be defined by claims.
First, example of formulations
1st, embodiment 1:21% amisulbrom fluopicolide wettable powder（20：1）
Amisulbrom 20%
Fluopicolide 1%
Lauryl sodium sulfate 2%
Sodium methylene bis-naphthalene sulfonate 6%
Precipitated calcium carbonate polishing is to 100%
The procedure of processing of described wettable powder is：By above-mentioned formula by amisulbrom and fluopicolide and dispersant, profit
Humectant and filler mixing, uniform stirring in stirred tank, mix, you can of the present invention contain is obtained after air-flow crushing
There is the wettable powder of amisulbrom and fluopicolide.
2nd, embodiment 2:22% amisulbrom fluopicolide wettable powder (10:1)
Amisulbrom 20%
Fluopicolide 2%
Neopelex 2%
The formaldehyde condensation products 8% of methyl naphthalene sulfonic acid sodium
Sodium carboxymethyl starch 2%
Soluble starch polishing is to 100%
The concrete procedure of processing of said composition water dispersible granules is：By above-mentioned formula by amisulbrom and fluopicolide and dispersion
Agent, wetting agent, disintegrant and filler mix, and are pulverized with micro jet, through mediating, subsequently into extruder grain
Machine granulates, and is dried in boiling drier, through sample analysis after screening, be obtained of the present invention containing amisulbrom with fluorine pyrrole
The water dispersible granules of bacterium amine.
3rd, embodiment 3:40% amisulbrom fluopicolide dispersibles oil-suspending agent（5:3）
Amisulbrom 25%
Fluopicolide 15%
Calcium dodecyl benzene sulfonate 15%
Castor oil polyoxyethylene ether 8%
Organobentonite 3%
Methyl oleate polishing is to 100%
The concrete procedure of processing that said composition dispersibles oil-suspending agent is：By above-mentioned formula by oil and dispersant, thickener, emulsification
Agent mixes, and mixes through high speed shear, adds amisulbrom and fluopicolide, continues shearing and mixes, subsequently into horizontal
Grind in sand mill, make preparation particle diameter all in below 10um, be obtained of the present invention containing amisulbrom with fluorine pyrrole bacterium
Amine dispersible oil-suspending agent.
4th, embodiment 4:45% amisulbrom fluopicolide microemulsion（2：1）
Amisulbrom 30%
Fluopicolide 15%
Dimethyl carbonate 10%
Tetrahydrofurfuryl alcohol 10%
AEO 20%
Water polishing is to 100%
The concrete procedure of processing of said composition microemulsion is：Mix by above-mentioned formula dimethyl carbonate and tetrahydrofurfuryl alcohol, add Yin
Azoles flusulfamide and fluopicolide, after being completely dissolved, add mulser to mix, are eventually adding deionized water, stir, system
Obtain the microemulsion containing amisulbrom and fluopicolide of the present invention.
5th, embodiment 5:40% amisulbrom fluopicolide suspending agent（1:1）
Amisulbrom 20%
Fluopicolide 20%
AEO 1%
Sodium methylene bis-naphthalene sulfonate 4%
Xanthans 0.1%
Propane diols 4%
Defoamer 0.1%
Water polishing is to 100%
The concrete procedure of processing of said composition suspending agent is：By in above-mentioned formula by water and wetting agent, dispersant, thickener, anti-
Freeze agent and defoamer mixing, mix through high speed shear, add amisulbrom and fluopicolide, continue shearing and mix,
Subsequently in horizontal sand mill grind, make preparation particle diameter all in 5 below um, be obtained of the present invention containing indazole sulphur
Bacterium amine and the suspending agent of fluopicolide.
6th, embodiment 6:30% amisulbrom fluopicolide microemulsion（1：2）
Amisulbrom 10%
Fluopicolide 20%
Dimethyl carbonate 10%
Tetrahydrofurfuryl alcohol 10%
AEO 20%
Water polishing is to 100%
The concrete procedure of processing of described microemulsion is：Mix by above-mentioned formula dimethyl carbonate and tetrahydrofurfuryl alcohol, add indazole sulphur
Bacterium amine and fluopicolide, after being completely dissolved, add mulser to mix, are eventually adding deionized water, stir, this is obtained
The described microemulsion containing amisulbrom and fluopicolide of invention.
7th, embodiment 7:36% amisulbrom fluopicolide aqueous emulsion（1:3）
Amisulbrom 9%
Fluopicolide 27%
Solvent naphtha 10%
Tetrahydrofurfuryl alcohol 10%
Terminal hydroxy group polyoxyethylene poly-oxygen propylene aether 10%
AEO 5%
Water polishing is to 100%
The concrete procedure of processing of described aqueous emulsion is：Mix by above-mentioned formula dimethyl carbonate and tetrahydrofurfuryl alcohol, add indazole sulphur
Bacterium amine and fluopicolide, after being completely dissolved, add emulsifying agent to mix formation oil phase, add water to oil phase under shear action
In, continue shearing about 30 minutes, of the present invention aqueous emulsion containing amisulbrom and fluopicolide is obtained.
8th, embodiment 8:18% amisulbrom fluopicolide dispersibles oil-suspending agent（1:5）
Amisulbrom 3%
Fluopicolide 15%
Calcium dodecyl benzene sulfonate 10%
Castor oil polyoxyethylene ether 8%
Organobentonite 3%
Methyl oleate polishing is to 100%
The concrete procedure of processing that said composition dispersibles oil-suspending agent is：By above-mentioned formula by oil and dispersant, thickener, emulsification
Agent mixes, and mixes through high speed shear, adds amisulbrom and fluopicolide, continues shearing and mixes, subsequently into horizontal
Grind in sand mill, make preparation particle diameter all in 10 below um, be obtained of the present invention containing amisulbrom with fluorine pyrrole bacterium
Amine dispersible oil-suspending agent.
9th, embodiment 9:11% amisulbrom fluopicolide wettable powder（1：10）
Amisulbrom 1%
Fluopicolide 10%
Lauryl sodium sulfate 2%
Sodium methylene bis-naphthalene sulfonate 6%
Precipitated calcium carbonate polishing is to 100%
The concrete procedure of processing of described wettable powder is：By above-mentioned formula by amisulbrom and fluopicolide and dispersion
Agent, wetting agent and filler mixing, uniform stirring in stirred tank, mix, you can prepared institute of the present invention after air-flow crushing
The wettable powder containing amisulbrom and fluopicolide stated.
10th, embodiment 10:21% amisulbrom fluopicolide microemulsion（1：20）
Amisulbrom 1%
Fluopicolide 20%
Solvent naphtha 10%
Tetrahydrofurfuryl alcohol 10%
Terminal hydroxy group polyoxyethylene poly-oxygen propylene aether 10%
AEO 5%
Water complements to 100%
The concrete procedure of processing of said composition microemulsion is：Mix by above-mentioned formula dimethyl carbonate and tetrahydrofurfuryl alcohol, add Yin
Azoles flusulfamide and fluopicolide, after being completely dissolved, add emulsifying agent to mix formation oil phase, add water under shear action
In oil phase, continue shearing about 30 minutes, of the present invention microemulsion containing amisulbrom and fluopicolide is obtained.
11st, embodiment 2:35% amisulbrom fluopicolide suspending agent（5：2）
Amisulbrom 25%
Fluopicolide 10%
Neopelex 1%
Sodium methylene bis-naphthalene sulfonate 4%
Xanthans 0.1%
Propane diols 4%
Defoamer 0.1%
Water polishing is to 100%
The concrete procedure of processing of said composition suspending agent is：By in above-mentioned formula by water and wetting agent, dispersant, thickener, anti-
Freeze agent and defoamer mixing, mix through high speed shear, add amisulbrom and fluopicolide, continue shearing and mix,
Subsequently in horizontal sand mill grind, make preparation particle diameter all in below 5um, be obtained of the present invention containing indazole sulphur bacterium
Amine and the suspending agent of fluopicolide.
12nd, embodiment 12：44% amisulbrom fluopicolide water dispersible granules（7:4）
Amisulbrom 28%
Fluopicolide 16%
Neopelex 2%
The formaldehyde condensation products 8% of methyl naphthalene sulfonic acid sodium
Sodium carboxymethyl starch 2%
Soluble starch polishing is to 100%
The concrete procedure of processing of said composition water dispersible granules is：By above-mentioned formula by amisulbrom and fluopicolide and dispersion
Agent, wetting agent, disintegrant and filler mix, and are pulverized with micro jet, through mediating, subsequently into extruder grain
Machine granulates, and is dried in boiling drier, through sample analysis after screening, be obtained of the present invention containing amisulbrom with fluorine pyrrole
The water dispersible granules of bacterium amine.
2nd, Toxicity Determination
1st, cucumber downy mildew interior synergy is measured
The synergy research that inventor is mutually compounded with amisulbrom and fluopicolide, concrete grammar is as follows.Test is adopted
With bacterium of downy mildew of cucumber (Pseudoperonospora cubensis) it is test object.Active compound is configured to the investigational agent needing
Agent, test method reference《People's Republic of China (PRC) agricultural industry criteria NY/T1156. 3-2006)》.First by single dose and each mixed
Dose out powders 5 variable concentrations gradients of setting (on the basis of pilot study result, combined different with proportioning according to different agents,
Concentration gradient setting is also different, and bacteriostasis rate is pressed geometric progression in the range of 5%-90% and set).Test target bacterium is to pick up from
The bacterium of downy mildew of cucumber blade of field from up to down 4 leaf -6 leaf position, uses 40oThe Pseudoperonospora cubensis spore at the C distillation washing lower blade back side
Ascus, (concentration controls at every milliliter 1 × 10 to be made into suspension5Individual -1 × 107Individual sporangium), deposit standby at 4 DEG C;By liquid
Uniformly spray in the healthy leaves back side, after liquid natural air drying, each process blade and blade is dorsad gone up, discharges after mark by processing
In moisture preservation box.Test the process setting without medicament and make blank.Micro- with ready Fresh spores capsule suspension drop 10
Rise and be inoculated in vacuum side of blade.Every blade inoculation 4, often processes and is no less than 5 leaves.24h inoculation before treatment.Ware is covered after inoculation
Lid, is placed in growth cabinet or the humidistat having illumination, replaces in daily continuous illumination/dark 12h, and temperature is 17 DEG C -22 DEG C,
Cultivate under conditions of relative humidity more than 90%.Measure and record lesion diameter depending on process and blank incidence, unit is
Millimeter (mm), calculates prevention effect, and result of the test is as shown in table 1.By the probit value of prevention effect and the logarithm of series concentration
Linear regression analysis between value, obtains the EC of each medicament50Value, calculates the co-toxicity coefficient (CTC) of mixture, with this with the abundant method of Sun Yun
To evaluate the activity to germ for the reagent agent.
The co-toxicity coefficient (CTC) >=120 of complex preparation shows as synergistic effect;CTC≤80 show as antagonism; 80
<CTC<120 show as summation action.
Toxicity Determination result shows, amisulbrom and fluopicolide are 1:20-20:To cucumber cream in the range of 1
The preventing and treating of mildew all shows as synergistic function.
3rd, field control effectiveness test
1. test process：The difference of each composition of this experimental evidence sets two dosings respectively, and dosing is active ingredient
The quality of amisulbrom (A) and fluopicolide (B) and.Comparison medicament is 20% amisulbrom suspending agent and 20% fluorine pyrrole respectively
Bacterium amine suspending agent and blank clean water experiment.
2. test method：Each plot area is 66.7m2, it is repeated 3 times；Investigation drug effect after investigating before dispenser and preventing and treating
Method is：5 points of grab sample in test process area, carry out severity Scaling according to national field test relevant criterion, calculate anti-
Effect.Result of the test see table：
Shown by field efficacy result, as shown in Table 2, the present composition has obvious synergistic function, composition
Prevention effect excellent, prevention effect is all better than single dose kind, agricultural application in there is using value.
Claims (6)
1. a kind of composition pesticide is it is characterised in that active component comprises amisulbrom and fluopicolide.
2. composition pesticide according to claim 1 is it is characterised in that the weight of described amisulbrom and fluopicolide
Than for 1:20-20：1.
3. the composition pesticide according to any one of claim 1-2 claim it is characterised in that：Described pesticide combination
Thing is aided with Pesticide formulation auxiliary element and is processed into any one formulation being suitable for agriculturally using.
4. composition pesticide according to claim 3 it is characterised in that described composition pesticide formulation be missible oil, can
WP, suspending agent, aqueous emulsion, microemulsion, water dispersible granules, dispersible oil-suspending agent, dispersible finish, dispersible
Agent, solvable pulvis, soluble granule, microcapsule suspending agent, suspension emulsion, liquor, arbitrary in finish in.
5. composition pesticide according to any one of claim 1-4 claim is used for preventing and kill off the purposes of corps diseases.
6. purposes according to claim 5 is it is characterised in that described corps diseases are to prevent and treat samping off, epidemic disease, downy mildew
Disease, in white blister any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610833451.2A CN106417313A (en) | 2016-09-20 | 2016-09-20 | Bactericidal composition containing amisulbrom and fluopicolide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610833451.2A CN106417313A (en) | 2016-09-20 | 2016-09-20 | Bactericidal composition containing amisulbrom and fluopicolide |
Publications (1)
| Publication Number | Publication Date |
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| CN106417313A true CN106417313A (en) | 2017-02-22 |
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| CN201610833451.2A Pending CN106417313A (en) | 2016-09-20 | 2016-09-20 | Bactericidal composition containing amisulbrom and fluopicolide |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106417315A (en) * | 2016-09-27 | 2017-02-22 | 西安北农华农作物保护有限公司 | High-efficiency bactericidal composition containing amisulbrom |
| CN115039783A (en) * | 2021-03-08 | 2022-09-13 | 东莞市东阳光农药研发有限公司 | Bactericidal composition, preparation method and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010150230A (en) * | 2008-05-09 | 2010-07-08 | Nissan Chem Ind Ltd | Germicidal composition |
| CN103461399A (en) * | 2013-09-26 | 2013-12-25 | 卞佳林 | Natural bactericide for preventing and treating ginkgo nursery stock damping-off and preparation method thereof |
| CN105340921A (en) * | 2015-11-19 | 2016-02-24 | 广东中迅农科股份有限公司 | Sterilization composition containing amisulbrom and ametoctradin |
-
2016
- 2016-09-20 CN CN201610833451.2A patent/CN106417313A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010150230A (en) * | 2008-05-09 | 2010-07-08 | Nissan Chem Ind Ltd | Germicidal composition |
| CN103461399A (en) * | 2013-09-26 | 2013-12-25 | 卞佳林 | Natural bactericide for preventing and treating ginkgo nursery stock damping-off and preparation method thereof |
| CN105340921A (en) * | 2015-11-19 | 2016-02-24 | 广东中迅农科股份有限公司 | Sterilization composition containing amisulbrom and ametoctradin |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106417315A (en) * | 2016-09-27 | 2017-02-22 | 西安北农华农作物保护有限公司 | High-efficiency bactericidal composition containing amisulbrom |
| CN115039783A (en) * | 2021-03-08 | 2022-09-13 | 东莞市东阳光农药研发有限公司 | Bactericidal composition, preparation method and application thereof |
| CN115039783B (en) * | 2021-03-08 | 2024-01-16 | 东莞市东阳光农药研发有限公司 | Sterilization composition, preparation method and application thereof |
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