CN105794815A - Bactericidal composition containing isopyrazam and thiophanate-methyl and application of bactericidal composition - Google Patents
Bactericidal composition containing isopyrazam and thiophanate-methyl and application of bactericidal composition Download PDFInfo
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- CN105794815A CN105794815A CN201610266939.1A CN201610266939A CN105794815A CN 105794815 A CN105794815 A CN 105794815A CN 201610266939 A CN201610266939 A CN 201610266939A CN 105794815 A CN105794815 A CN 105794815A
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- methyl
- thiophanate
- isopyrazam
- bactericidal composition
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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
- A01N47/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid
- A01N47/08—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid the carbon atom having one or more single bonds to nitrogen atoms
- A01N47/28—Ureas or thioureas containing the groups >N—CO—N< or >N—CS—N<
- A01N47/34—Ureas or thioureas containing the groups >N—CO—N< or >N—CS—N< containing the groups, e.g. biuret; Thio analogues thereof; Urea-aldehyde condensation products
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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
- A01N43/48—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with two nitrogen atoms as the only ring hetero atoms
- A01N43/56—1,2-Diazoles; Hydrogenated 1,2-diazoles
Abstract
The invention discloses a bactericidal composition containing isopyrazam and thiophanate-methyl and application of the bactericidal composition. The bactericidal composition takes the isopyrazam and the thiophanate-methyl as main effective components, wherein the mass ratio of the isopyrazam to the thiophanate-methyl is (1 to 70):(1 to 50). The bactericidal composition can be applied to control on cereal, fruit tree and vegetable diseases, has higher synergetic effect, and is high in sterilizing speed and long in lasting period; the insecticide resistance of germs is overcome and delayed; the application cost is reduced; the control effect of the bactericidal composition is remarkably superior to that of a single agent of the isopyrazam or the thiophanate-methyl. The bactericidal composition disclosed by the invention can be used for controlling fungi diseases on crops, and particularly can be used for controlling fungi diseases such as wheat rust and wheat scab; the effect of the bactericidal composition is remarkably superior to that of the single agent.
Description
Technical field:
The present invention relates to a kind of bactericidal composition and application thereof, especially a kind of with isopyrazam and thiophanate-methyl be main active bactericidal composition and application.
Background technology
Isopyrazam (Isopyrazam), molecular formula: C20H23F2N3O, chemical name: 3-difluoromethyl-1-methyl-N-[1,2,3 ,-tetrahydrochysene=9-(1-Methylethyl)-Isosorbide-5-Nitrae-methanonaphthalen-5-base]-1H-pyrazole-4-carboxamide.
Isopyrazam is pyrazoles antibacterial, is the systemic fungicide that has concurrently of a kind of novel spectrum, protection and therapeutic activity.
Thiophanate-methyl (Thiophanate-methyl), molecular formula: C12H14N4O4S2, chemical name: 1,2-bis--(3-methoxycarbonyl group-2-ghiourea group) benzene.Structural formula:
Thiophanate-methyl is wide spectrum systemic fungicide, can prevent and treat the various diseases of Cereal, Cotton Gossypii, water fruits and vegetables turf and other crops, such as wheat, barley and highland barley head blight, disease in cotton seedling stage, wheat rust, fruit diseases etc..
The industrial crops cultivated areas such as the difficulty of prevention and cure of current phytopathogen is increasing, on the one hand, along with the change of pattern of farming, melon fruits and vegetables progressively expand, and disease occurrence degree, occur quantity all to increase, and in preventing and treating, difficulty strengthens；On the other hand, the resistance of pathogen rises year by year under lasting medicament selection pressure, and the prevention effect of single dose is had a greatly reduced quality, and control of plant disease is faced with significant challenge.
Summary of the invention:
It is an object of the invention to provide a kind of applied widely, plant bactericidal composition containing isopyrazam Yu thiophanate-methyl that cost is low, effective for above-mentioned technical problem.
It is a still further object of the present invention to provide this bactericidal composition and cause the application on fungal disease at preventing and treating plant epiphyte, particularly in the purposes prevented and treated on the fungal disease such as wheat rust, wheat scab.
It is an object of the invention to be achieved through the following technical solutions:
A kind of bactericidal composition containing isopyrazam and thiophanate-methyl, this bactericidal composition is with isopyrazam and thiophanate-methyl for principle active component, wherein isopyrazam is 1～70:1～50 with the mass ratio of thiophanate-methyl, and wherein in bactericidal composition, active ingredient is present in compositions with enhancing effective amount.
Described bactericidal composition, wherein isopyrazam is preferably 1～20:1～30 with the mass ratio of thiophanate-methyl, more preferably 1～10:1～20, is further preferably 1～5:1～6.
The preferred mass proportioning of isopyrazam and thiophanate-methyl can also be: 70:1,50:1,30:1,20:1,10:1,5:1,2.5:1,1:1,1:2,1:4,1:6,1:10,1:20,1:30,1:50.
In the compositions of the present invention, the weight/mass percentage composition accounting for compositions both isopyrazam and thiophanate-methyl is 2～80%.Preferably 5～70%.
Described bactericidal composition, any one dosage form being wherein re-dubbed on pesticide with isopyrazam and thiophanate-methyl for principle active component and known auxiliary agent and excipient to allow.These known auxiliary agents, excipient has dispersant, diffusant, defoamer, wetting agent, disintegrating agent etc., calcium dodecyl benzene sulfonate can be adopted, alkylphenol polyoxyethylene, Ben-zylphenol Polyoxyethyl Ether, phenethyl phenol polyethenoxy ether, fatty alcohol-polyoxyethylene ether and similar products thereof, aliphatic amine polyoxyethylene ether, fatty acid ethylene oxide addition product, polyoxyethylene polyoxy propylene block compound, castor oil polyoxyethylene ether, NPE, TWEEN Series, fatty alcohol-polyoxyethylene ether, Polyethylene Glycol series, Sulfonates, carboxylate, sulfate, phosphate, phosphite, lignosulfonates, xanthan gum, phenol formaldehyde condensate, ammonium salt, one or more combinations in quaternary etc., excipient includes Ketohexamethylene, dimethylbenzene, various solvent naphthas, water, antifreezing agent (such as propylene glycol), deionized water etc..Above auxiliary agent, excipient and other adjuvant can be alone or and use.
Described bactericidal composition, its dosage form is cream, wettable powder, suspending agent, aqueous emulsion or water dispersion granule.
The application on preparation preventing and treating fungal diseases of plants medicine of the above-mentioned bactericidal composition.Particularly in preventing and treating Cereal, fruit tree, vegetable crop disease aspect application there is remarkable result.
Above-mentioned application, described fungal diseases of plants is at least one in wheat rust, wheat scab.
The feature of bactericidal composition of the present invention:
1, isopyrazam used by the present invention and thiophanate-methyl, the mechanism of action is different, and mutual mixture will not produce low touching, can Synergistic, reduce dosage, reduce cost.
2, the present composition scope of application increases, it is adaptable to preventing and treating the refractory fungal disease of Cereal, fruit tree, vegetable, particularly preventing and treating wheat rust, wheat scab etc. all has significant effect.Ascomycetes, basidiomycetes, Fungi Imperfecti and Oomycete fungal disease are had good prevention effect by bactericidal composition of the present invention；And suppress the drug-fast generation to unitary agent (isopyrazam and thiophanate-methyl are arbitrary) of insect or fungus.Bactericidal composition of the present invention can produce higher synergistic function, and the consumption of the independent reactive compound of amount ratio of this mixture is substantially reduced, and namely the activity of mixture is more than the activity of independent component.
Compared with prior art beneficial effects of the present invention: (1) is compared with single dose, the said composition antagonism fungal disease such as fungal disease such as powdery mildew of cucumber, wheat rust, wheat scab has obvious synergistic function, overcome and delayed Drug resistance, expanding prevention is composed, hence it is evident that improve prevention effect；(2) preventing and treating recruitment, drug cost are reduced；(3) alternative routine and the pesticide being easily generated resistance；(4) compared with single dose, produce and use cost reduces；(5) suppressing the drug-fast generation of fungus, its effect uses apparently higher than its single dose.
Detailed description of the invention
Below in conjunction with embodiment, the invention will be further described, and in embodiment, the preparation method of dosage form is conventional method, and " % " of the present invention is mass percent.
Indoor biometrics is tested:
In indoor employing mycelial growth rate method, measure the different agents EC to bacterial strain50Value, adopts co-toxicity coefficient computational methods, calculates the co-toxicity coefficient (CTC) of mixture, it is determined that mixture building performance, and circular is as follows:
In mixture, a certain single dose (is generally selected EC for standard agent50Junior), it is calculated:
Single dose toxicity index=standard agent EC50/ certain single dose EC50×100
Toxicity index × A single dose the toxicity index of proportion+B single dose × B single dose proportion in mixture in mixture of theoretical toxicity index=A single dose
The EC of actual measurement toxicity index=standard single dose50The EC of value/mixture50Value × 100
Co-toxicity coefficient=actual measurement toxicity index/theory toxicity index × 100
When co-toxicity coefficient classification: CTC is more than 120, mixture has synergetic, is antagonism when CTC is less than 80, and CTC is summation action between 80-120.
According to effective ingredient isopyrazam (A): thiophanate-methyl (B) quality proportioning is: 80:1,70:1,50:1,30:1,20:1,10:1,5:1,2.5:1,1:1,1:2,1:4,1:6,1:10,1:20,1:30,1:50,1:60 test, and measures its co-toxicity coefficient to fusarium graminearum (FusaHumgraminearumSehw.).
Table 1: the isopyrazam+thiophanate-methyl different ratio indoor biometrics result to wheat scab
| Medicament | Virulence regression equation | EC50(mg/L) | Co-toxicity coefficient |
| 13.16% isopyrazam EC | Y=2.939+2.598X | 6.215 | - |
| 70% thiophanate-methyl WP | Y=2.743+3.620X | 4.201 | - |
| A:B=80:1 | Y=2.887+2.358X | 7.873 | 78.48 |
| A:B=70:1 | Y=4.126+1.526X | 3.741 | 165.02 |
| A:B=50:1 | Y=4.316+0.987X | 4.934 | 124.78 |
| A:B=30:1 | Y=3.640+2.056X | 4.584 | 133.52 |
| A:B=20:1 | Y=3.280+3.112X | 3.571 | 170.18 |
| A:B=10:1 | Y=3.557+2.598X | 3.592 | 165.82 |
| A:B=5:1 | Y=3.372+3.201X | 3.225 | 178.45 |
| A:B=2.5:1 | Y=3.875+2.563X | 2.747 | 199.01 |
| A:B=1:1 | Y=3.844+2.635X | 2.747 | 182.45 |
| A:B=1:2 | Y=3.779+3.052X | 2.512 | 187.49 |
| A:B=1:4 | Y=4.320+1.547X | 2.752 | 163.25 |
| A:B=1:6 | Y=4.483+1.252X | 2.588 | 170.18 |
| A:B=1:10 | Y=3.223+3.625X | 3.091 | 140.05 |
| A:B=1:20 | Y=3.263+4.001X | 2.717 | 157.04 |
| A:B=1:30 | Y=3.523+3.687X | 2.516 | 168.72 |
| A:B=1:50 | Y=4.025+2.034X | 3.015 | 140.21 |
| A:B=1:60 | Y=3.655+2.023X | 4.623 | 91.36 |
Field control effectiveness test:
The pesticidal preparations prepared with above-described embodiment prevents and treats the test of wheat scab disease.
1, test processes: this test medicine consumption sets three concentration for the treatment of respectively according to the difference of each composition, and comparison medicament is pesticide single dose 13.16% isopyrazam EC and 70% thiophanate-methyl WP and blank clean water experiment respectively.
2, each plot area of test method is 66.7m2, repeat 3 times；Investigation drug effect method after investigating before dispenser and preventing and treating is: randomization 5 point in test treatment region, carries out severity Scaling according to country's field test relevant criterion, calculates preventive effect.Result of the test is in Table 2:
Table 2 field test effect
By indoor biometrics and field efficacy it is shown that isopyrazam and thiophanate-methyl compositions have obvious synergistic function, the prevention effect of compositions is excellent, and prevention effect is all better than single dose kind, has using value in agricultural is applied.
Two kinds of reactive compounds can be processed into any one dosage form of permission, with specific embodiment, the preparation that two kinds of effective ingredient are processed into is described below, but the preparation that these two kinds of active component can be processed is not limited only to set forth below.
Embodiment 1:15% isopyrazam thiophanate-methyl wettable powder (1:2)
By isopyrazam 5g, thiophanate-methyl 10g, detergent LS (to methoxyl group fatty acid amido benzene sulfonic acid sodium salt) 2g, dispersing agent NNO (sodium methylene bis-naphthalene sulfonate) 4g, white carbon 5g, Kaolin adds to 100g mixture and carries out comminution by gas stream, and preparing effective ingredient mass percent is 15% isopyrazam thiophanate-methyl wettable powder.
Embodiment 2:15% isopyrazam thiophanate-methyl wettable powder (1:4)
By isopyrazam 3g, thiophanate-methyl 12g, sodium lauryl sulphate 3g, dispersing agent NNO 4g, white carbon 5g, Kaolin adds to 100g mixture and carries out comminution by gas stream, and preparing effective ingredient mass percent is 15% isopyrazam thiophanate-methyl wettable powder.
Embodiment 3:14% isopyrazam thiophanate-methyl wettable powder (1:6)
By isopyrazam 2g, thiophanate-methyl 12g, sodium lauryl sulphate 3g, dispersing agent NNO 4g, white carbon 5g, Kaolin adds to 100g mixture and carries out comminution by gas stream, and preparing effective ingredient mass percent is 14% isopyrazam thiophanate-methyl wettable powder.
Embodiment 4:20% isopyrazam thiophanate-methyl suspending agent (1:1)
Weigh 10g isopyrazam, 10g thiophanate-methyl, lignin 2g, polyoxyethylene poly-oxygen propylene aether and sulfate 4g thereof, xanthan gum 0.15g, ethylene glycol 5g, silica ethane 0.10g, aluminium-magnesium silicate 0.5g, complementing to 100g with water, making effective Ingredient percent under the effect of sand mill is 20% isopyrazam thiophanate-methyl suspending agent.
Embodiment 5:55% isopyrazam thiophanate-methyl aqueous emulsion (1:10)
Weigh 5g isopyrazam, 50g thiophanate-methyl, phenethyl phenol polyethenoxy ether phosphate 3g, agriculture breast 33#2g, alkylphenol polyoxyethylene 1g, solvent naphtha 13g, add water to 100g.The method that above raw material is prepared aqueous emulsion routinely puts into the mixing of mixing kettle high speed, and making effective Ingredient percent is 55% isopyrazam thiophanate-methyl aqueous emulsion.
Embodiment 6:42% isopyrazam methyl sulfur bacterium missible oil (1:20)
Weighing 2g isopyrazam, 40g thiophanate-methyl, calcium dodecyl benzene sulfonate 8g, phenethyl phenol polyethenoxy ether 5g, solvent naphtha are to 100g.The method that above raw material is prepared cream routinely puts into mixing in mixing kettle, and making effective Ingredient percent is 42% isopyrazam methyl sulfur bacterium missible oil.
Embodiment 7:70% isopyrazam methyl sulfur bacterium missible oil (2.5:1)
Weighing 50g isopyrazam, 20g thiophanate-methyl, calcium dodecyl benzene sulfonate 5g, phenethyl phenol polyethenoxy ether 2g, castor oil polyoxyethylene ether 2g, solvent naphtha are to 100g.The method that above raw material is prepared cream routinely puts into mixing in mixing kettle, and making effective Ingredient percent is 70% isopyrazam methyl sulfur bacterium missible oil.
Embodiment 8:18% isopyrazam thiophanate-methyl water dispersion granule (5:1)
Weigh 15g isopyrazam, 3g thiophanate-methyl, wooden sodium sulfonate 8g, sodium lauryl sulphate 2g, ammonium sulfate 5g, polyvinyl alcohol 5g, Borax 2g, kieselguhr 28g complements to 100g, and by water dispersible granular agent method, above raw material is formed with effect Ingredient percent is 17% isopyrazam thiophanate-methyl water dispersion granule.
Embodiment 9:11% isopyrazam methyl sulfur bacterium missible oil (10:1)
Weighing 10g isopyrazam, 1g thiophanate-methyl, calcium dodecyl benzene sulfonate 6g, phenethyl phenol polyethenoxy ether 7g, solvent naphtha are to 100g.The method that above raw material is prepared cream routinely puts into mixing in mixing kettle, and making effective Ingredient percent is 11% isopyrazam methyl sulfur bacterium missible oil.
Embodiment 10:31.5% isopyrazam thiophanate-methyl microemulsion (20:1)
Weigh 30g isopyrazam, 1.5g thiophanate-methyl, calcium dodecyl benzene sulfonate 6g, phenethyl phenol polyethenoxy ether phosphate 3g, agriculture breast 33#2g, alkylphenol polyoxyethylene 1g, isopropanol 10g, add water to 100g.The method that above raw material is prepared microemulsion routinely puts into mixing in mixing kettle, and making effective Ingredient percent is 31.5% isopyrazam thiophanate-methyl microemulsion.
Embodiment 11:31% isopyrazam methyl sulfur bacterium missible oil (30:1)
Weighing 30g isopyrazam, 1g thiophanate-methyl, calcium dodecyl benzene sulfonate 4g, phenethyl phenol polyethenoxy ether 4g, solvent naphtha are to 100g.The method that above raw material is prepared cream routinely puts into mixing in mixing kettle, and making effective Ingredient percent is 31% isopyrazam methyl sulfur bacterium missible oil.
Embodiment 12:51% isopyrazam thiophanate-methyl suspending agent (50:1)
Weigh 50g isopyrazam, 1g thiophanate-methyl, lignin 2g, polyoxyethylene poly-oxygen propylene aether and sulfate 4g thereof, xanthan gum 0.15g, ethylene glycol 5g, silica ethane 0.10g, aluminium-magnesium silicate 0.5g, complementing to 100g with water, making effective Ingredient percent under the effect of sand mill is 51% isopyrazam thiophanate-methyl suspending agent.
Embodiment 13:32% isopyrazam thiophanate-methyl microemulsion (1:15)
Weigh 2g isopyrazam, 30g thiophanate-methyl, calcium dodecyl benzene sulfonate 6g, phenethyl phenol polyethenoxy ether phosphate 3g, agriculture breast 33#2g, alkylphenol polyoxyethylene 1g, isopropanol 10g, add water to 100g.The method that above raw material is prepared microemulsion routinely puts into mixing in mixing kettle, and making effective Ingredient percent is 32% isopyrazam thiophanate-methyl microemulsion.
Embodiment 14:6% isopyrazam thiophanate-methyl aqueous emulsion (1:5)
Weigh 1g isopyrazam, 5g thiophanate-methyl, phenethyl phenol polyethenoxy ether phosphate 3g, agriculture breast 33#2g, alkylphenol polyoxyethylene 1g, solvent naphtha 13g, add water to 100g.The method that above raw material is prepared aqueous emulsion routinely puts into the mixing of mixing kettle high speed, and making effective Ingredient percent is 6% isopyrazam thiophanate-methyl aqueous emulsion.
Embodiment 15:62% isopyrazam thiophanate-methyl microemulsion (1:30)
Weigh 2g isopyrazam, 60g thiophanate-methyl, calcium dodecyl benzene sulfonate 6g, phenethyl phenol polyethenoxy ether phosphate 3g, agriculture breast 33#2g, alkylphenol polyoxyethylene 1g, isopropanol 10g, add water to 100g.The method that above raw material is prepared microemulsion routinely puts into mixing in mixing kettle, and making effective Ingredient percent is 62% isopyrazam thiophanate-methyl microemulsion.
Embodiment 16:51% isopyrazam thiophanate-methyl suspending agent (1:50)
Weigh 1g isopyrazam, 50g thiophanate-methyl, lignin 2g, polyoxyethylene poly-oxygen propylene aether and sulfate 4g thereof, xanthan gum 0.15g, ethylene glycol 5g, silica ethane 0.10g, aluminium-magnesium silicate 0.5g, complementing to 100g with water, making effective Ingredient percent under the effect of sand mill is 51% isopyrazam thiophanate-methyl suspending agent.
Embodiment 17:7% isopyrazam thiophanate-methyl water dispersion granule (1:2.5)
Weigh 2g isopyrazam, 5g thiophanate-methyl, wooden sodium sulfonate 8g, sodium lauryl sulphate 2g, ammonium sulfate 5g, polyvinyl alcohol 5g, Borax 2g, white carbon 3g, kieselguhr complement to 100g, and by water dispersible granular agent method, above raw material is formed with effect Ingredient percent is 7% isopyrazam thiophanate-methyl water dispersion granule.
Claims (10)
1. the bactericidal composition containing isopyrazam and thiophanate-methyl, it is characterised in that this bactericidal composition is with isopyrazam and thiophanate-methyl for principle active component, and wherein isopyrazam is 1～70:1～50 with the mass ratio of thiophanate-methyl.
2. bactericidal composition according to claim 1, it is characterised in that the mass ratio of described isopyrazam and thiophanate-methyl is 1～20:1～30.
3. bactericidal composition according to claim 2, it is characterised in that the mass ratio of described isopyrazam and thiophanate-methyl is 1～10:1～20.
4. bactericidal composition according to claim 3, it is characterised in that the mass ratio of described isopyrazam and thiophanate-methyl is 1～5:1～6.
5. bactericidal composition according to claim 1, it is characterised in that it is 2-80% that both described isopyrazam and thiophanate-methyl account for the weight/mass percentage composition of compositions.
6. bactericidal composition according to claim 5, it is characterised in that it is 5-70% that both described isopyrazam and thiophanate-methyl account for the weight/mass percentage composition of compositions.
7. bactericidal composition according to claim 1, it is characterised in that any one dosage form being configured on pesticide with isopyrazam and thiophanate-methyl for principle active component and insecticides adjuvant, excipient to allow.
8. bactericidal composition according to claim 7, it is characterised in that described dosage form is cream, suspending agent, aqueous emulsion, wettable powder or water dispersion granule.
9. the application on preparation preventing and treating fungal diseases of plants medicine of the bactericidal composition described in claim 1.
10. application according to claim 9, it is characterised in that described fungal diseases of plants is at least one in wheat rust, wheat scab.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101677558A (en) * | 2007-04-25 | 2010-03-24 | 先正达参股股份有限公司 | fungicidal compositions |
| EP2366289A1 (en) * | 2010-03-18 | 2011-09-21 | Basf Se | Synergistic fungicidal mixtures |
| CN105230642A (en) * | 2014-07-11 | 2016-01-13 | 深圳诺普信农化股份有限公司 | Bactericidal composition containing isopyrazam and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101677558A (en) * | 2007-04-25 | 2010-03-24 | 先正达参股股份有限公司 | fungicidal compositions |
| EP2366289A1 (en) * | 2010-03-18 | 2011-09-21 | Basf Se | Synergistic fungicidal mixtures |
| CN105230642A (en) * | 2014-07-11 | 2016-01-13 | 深圳诺普信农化股份有限公司 | Bactericidal composition containing isopyrazam and application thereof |
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