CN105284832A - Bactericidal composition - Google Patents
Bactericidal composition Download PDFInfo
- Publication number
- CN105284832A CN105284832A CN201410232182.5A CN201410232182A CN105284832A CN 105284832 A CN105284832 A CN 105284832A CN 201410232182 A CN201410232182 A CN 201410232182A CN 105284832 A CN105284832 A CN 105284832A
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- CN
- China
- Prior art keywords
- isopyrazam
- fluoxastrobin
- powdery mildew
- bactericidal composition
- composition
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Landscapes
- Agricultural Chemicals And Associated Chemicals (AREA)
Abstract
The invention discloses a bactericidal composition. The composition comprises effective components of isopyrazam and fluoxastrobin, wherein a mass ratio of the isopyrazam to the fluoxastrobin is 1: 50 to 50: 1; preferably, the mass ratio is 1: 20 to 20: 1; and more preferably, the mass ratio is 1: 10 to 10: 1. The composition can be prepared with the dosage forms of a suspension, a water dispersible granule or a wettable powder which are allowable in agriculture. The composition provided by the invention has significant synergistic effect and good safety, and is suitable for prevention and treatment of powdery mildew of crops, specifically for prevention and treatment of the powdery mildew of vegetables, fruits and cereal crops.
Description
Technical field
The present invention relates to a kind of bactericidal composition, the application of especially a kind of bactericidal composition containing isopyrazam and control corps diseases thereof, belongs to technical field of pesticide.
Background technology
Powdery mildew is a kind of worldwide disease of extensive generation, causes plant disease by the Erysiphaceae (Erysiphacesae) in fungi.Such as: the Cereal powdery mildew caused by standing grain powdery mildew (Erysiphegraminis); The powdery mildew of the various plants such as melon, the beans caused by Siberian cocklebur monofilament shell (Sphaerothecafuliginea), crudefiber crop; The grape powdery mildew caused by grape snag shell (Uncinulanecator); The powdery mildew of more than the 80 kind of trees such as mulberry, pears, persimmon, walnut, chestnut, lichee, papaya papaw caused by hazel ball pin shell (Phyllactiniacorylea); The powdery mildew etc. of the Flowers of Rosa caused by rose monofilament shell (Sphaerothecapannosa).
In production, main employing chemical pesticide control powdery mildew, mainly relies on benzimidazole, hydroxy pyrimidine class, phenoxyquinolines class, triazole type and methoxy acrylic bactericide at present.This type of medicament has created pesticide resistance in various degree because of Long-Time Service, and control efficiency reduces.In addition, triazole type medicament has inhibitory action when using dosage is large to the growth of crop, easily causes poisoning.Therefore effective pesticide control that research and development are new is needed badly.
Isopyrazam, english common name: lsopyrazam, molecular formula: C
20h
23f
2n
3o is the pyrazole amide series bactericidal agent developed by Syngenta Co., Ltd, by suppressing the succinate dehydrogenase on mitochondrial inner membrane in electron transport chain, makes disease fungus via breathing produce power, and then cannot disintegrate the growth of germ.This compound be used alone cost high and easily cause pathogen produce resistance risk.
Different pesticide active ingredients is combined, synergistic effect is significantly filled a prescription and greatly can be improved preventive effect, reduce dosage, reduce use cost, residue of pesticide and minimizing to the pollution of environment, can also delay pathogen simultaneously and produce resistance, be solve the quick and effective approach of one that current single use agricultural chemicals produces resistance and drug cost high problem.
Summary of the invention
The object of the invention is to: a kind of bactericidal composition being applicable to agriculturally production and application is provided, and contribute to reducing dosage, delay pathogen and produce resistance and reduce use cost.
For overcoming the deficiencies in the prior art, inventor by a large amount of indoor bioassay test and field control effectiveness test, unexpected find isopyrazam and fluoxastrobin composite with certain proportion after, Powdery Mildew is had significant synergies.
Fluoxastrobin, english common name: fluoxastrobin, molecular formula: C
21h
16clFN
4o
5, be the methoxy acrylic bactericide developed by Bayer Cropscience Co., Ltd.By at cytochrome b and C
1between electro transfer suppress mitochondrial breathing.The mechanism of action is different from isopyrazam.
Technical scheme of the present invention is: a kind of bactericidal composition, it is characterized in that containing active ingredient isopyrazam and fluoxastrobin, and the mass ratio of two active ingredients is 1:50 ~ 50:1, and preferred mass is than being 1:20 ~ 20:1, and more preferably mass ratio is 1:10 ~ 10:1.
In bactericidal composition of the present invention, the mass accumulation percentage composition of active ingredient is 3% ~ 80%, all the other are auxiliary agent, filler and other be of value to active ingredient at storage and known substance that in using, stable and drug effect plays.
Bactericidal composition of the present invention can be processed into any formulation agriculturally allowed, and good formulation has suspending agent, water dispersible granules or wetting powder.
Other composition in suspending agent comprises dispersant, wetting agent, defoamer, antifreezing agent, thickener, preservative and water; Other composition in water dispersible granules comprises dispersant, wetting agent, disintegrant and filler; Other composition in wetting powder comprises dispersant, wetting agent and filler.Below be all auxiliary element that is conventional in pesticidal preparations or permission use, be not particularly limited, concrete composition and consumption are determined by simple experiment according to recipe requirements.Such as:
Organic solvent can select in isopropyl alcohol, dimethylbenzene, DMF, ring ethyl ketone, toluene, dimethyl sulfoxide (DMSO), methyl alcohol, ethanol, trimethyl cyclic ethylene ketone, NOP, 1-METHYLPYRROLIDONE, propyl alcohol, butanols, ethylene glycol, diethylene glycol, ethylene glycol monomethyl ether, butyl ether, ethyl acetate, vegetable oil one or more.
Cosolvent can select in 1-METHYLPYRROLIDONE, dimethyl formamide, ethanol, the third ethanol, acetone one or more.
Dispersant can be selected sodium lignin sulfonate, calcium lignosulfonate, pulls open powder, one or more in calcium dodecyl benzene sulfonate, polycarboxylate, alkyl benzene sulfonate calcium salt, alkylphenol polyoxyethylene, aliphatic amine polyoxyethylene ether, polyoxyethylene carboxylate, fatty acid glyceride APEO.
Emulsifier can select agriculture breast 600
#(phenyl phenol polyoxyethyl ether), agriculture breast 1601
#(phenethyl phenol polyoxyethanyl polypropylene-base ether), agriculture breast 500
#(alkyl benzene calcium sulfonate), OP series phosphate (thermally coupled distillation columns), 600
#phosphate (phenyl phenol polyoxyethanyl ether phosphate), styrene polyoxyethylene rice ammonium sulfate, alkyl biphenyl ether disulfonic acid magnesium salts, triethanolamine salt, agriculture breast 400
#(benzyl xylenol polyoxyethyl ether), Nongru-700 number (alkyl phenolic resin polyoxyethyl ether), peaceful breast 36
#(phenethyl fluosite polyoxyethyl ether), agriculture breast 1600
#(phenethyl phenol polyoxyethanyl polypropylene-base ether), ethylene oxide-propylene oxide block copolymer, OP series (polyoxyethylene nonylphenol ether), agriculture breast 33
#(alkylaryl polyoxyethylene polyoxypropylene ether), agriculture breast 34
#one or more in (alkylaryl polyoxyethylene poly-oxygen propylene aether), Span series (sorbitan monostearate), TWEEN Series (sorbitan fatty acid ester APEO), AEO series (fat alcohol alcohol APEO).
Wetting agent can select that methyl naphthalene sulfonate formaldehyde condensate, lauryl sodium sulfate, Negel, alkyl benzene calcium sulfonate, tea are withered, spaonin powder, silkworm excrement, soapberry powder, bay alcohol radical sodium sulphate, washing powder, pull open in powder one or more.
Antifreezing agent can select in glycerine, urea, ethylene glycol, propane diols one or more.
Defoamer can select in metallic soap of stearic acid, polyureas, 20% aqueous emulsion of dimethyl polysiloxane fluid one or more.
Preservative can select one or more of Sodium Benzoate, sodium propionate, butyl p-hydroxybenzoate, dimethyl fumarate, potassium sorbate, sodium Diacetate.
Disintegrant can select in ammonium sulfate, urea, bentonite, aluminium chloride, citric acid, succinic acid, sodium bicarbonate one or more.
Thickener can to select in xanthans, CMC, methylcellulose, Magnesiumaluminumsilicate, polyvinyl alcohol one or more.
Filler can select in White Carbon black, kaolin, precipitated calcium carbonate, talcum, imvite or convex-concave rod stone, float stone, brickbat, sepiolite or bentonite and non-adsorbent calcium soil or sand one or more.
Composition described in the invention can provide with finished product preparation form, and namely in composition, each material mixes; The composition of composition also can provide with unit dose form, directly mixes in proportion in bucket or tank, be then diluted to required concentration before using.
Bactericidal composition of the present invention can be used for preventing and treating various fungus-caused plant disease, is specially adapted to prevent and treat veterinary antibiotics, cereal crop powdery mildew, as powdery mildew of cucumber, grape white powder, powdery mildew of strawberry, wheat powdery mildew.
Bactericidal composition of the present invention can be used by common method, and as leaching fruit, pour into a mould, smear, spray, spray, dusting, scatter or be fuming, its amount of application changes with weather condition, Crop growing stage and disease occurrence degree.
Compared with prior art, the beneficial effect that the present invention produces is: (1) composition synergistic effect is obvious, and preventive effect significantly improves compared with single dose; (2), after drug effect improves, reduce field dosage and use cost, decrease residue of pesticide and environmental pollution; (3) composition is made up of the active ingredient of different mechanism of action, and action site increases, and is conducive to overcoming and delay germ and produces resistance.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, the following specific embodiment of the present invention is described, but the present invention is limited to absolutely not these examples.
Being undertaken composite by the pesticide active ingredient of different types of structure, is a kind of effective means solving the problem such as cost and resistance in agricultural chemicals single dose application process at present.After the pesticide active ingredient mixing of different types of structure, usually show three kinds of type of action, i.e. summation action, synergistic effect and antagonism, but be specially which kind of effect, unpredictable, only have and just can be known by lot of experiments.Compound synergic is well filled a prescription, and can improve actual control efficiency, and reduce the usage amount of agricultural chemicals, contributing to the generation of delaying drug resistance, is one of important means of resistance management.
The present composition has obvious synergistic function to cucumber powdery mildew's pathogen, wheat powdery mildew etc., and is not only the simple addition of two kinds of pharmacy effects, is clear that very much this result can tested from following Toxicity Determination.
Assays Example 1: isopyrazam and the composite Toxicity Determination to cucumber powdery mildew's pathogen of fluoxastrobin
Subjects: cucumber powdery mildew's pathogen (Sphaerothecafuliginea (Sch.) Poll) (pick up from the wild powdery mildew of cucumber bacterial classification in field, and through separating-purifying)
Test method: test, with reference to People's Republic of China (PRC) agricultural industry criteria NY/T1156.11-2008 " farm-chemical indoor determination test rule bactericide the 11st part: method cut out by control cucurbits powdery mildew test basin ", adopts basin method of cutting out to measure.
Sow susceptible cucumber variety, potted plant to grow to 2-4 leaf periods for subsequent use.The former medicine of isopyrazam and the former medicine of the phonetic bacterium of fluorine use dimethyl formamide and acetone solution respectively, then dilute with 0.1% Tween-80 aqueous surfactant solution.Often process 3 basins, repeat for 4 times, 10ml liquid is evenly sprayed on blade face to all wetting, treats that liquid dries naturally for subsequent use.And establish the process only containing solvent and surfactant not containing active ingredient to make blank.24h before chemicals treatment, spray inoculation cucumber powdery mildew's pathogen spore suspension.The process for preparation of spore suspension is as follows: get and cover with Powdery Mildew cucumber leaves, is washed down by spore with the sterile water being added with a small amount of Tween-80 surfactant, and double gauze filters, and is modulated into 1x10 after microscopy
5the suspension of individual spore/milliliter.Inoculation is placed in thermostatic chamber, cultivates 7 days under temperature 20-24 DEG C of condition.When the sick leaf rate of blank reaches more than 80%, classification investigation manages incidence everywhere, calculates disease index and the control efficiency of each process, and often process investigation 30 leaves, grade scale is:
0 grade: without scab;
1 grade: lesion area accounts for less than 5% of one-piece blade area;
3 grades: lesion area accounts for the 5-15% of one-piece blade area;
5 grades: lesion area accounts for the 15-25% of one-piece blade area;
7 grades: lesion area accounts for the 25-50% of one-piece blade area;
9 grades: lesion area accounts for the 50%-75% of one-piece blade area;
11 grades: lesion area accounts for more than 75% of one-piece blade area.
Drug effect computational methods:
Control efficiency is converted into probability value (y), and liquor strength (μ g/ml) converts logarithm value (x) to, calculates virulence equation and concentration EC in suppressing with method of least squares
50, toxicity index and the co-toxicity coefficient (CTC) of medicament is calculated according to the abundant method of Sun Yun.
Actual measurement toxicity index (ATI)=(standard agent EC
50/ reagent agent EC
50) × 100
In theoretical toxicity index (TTI)=A medicament toxicity index × mixture A percentage composition+B medicament toxicity index × mixture in the percentage composition of B
Co-toxicity coefficient (CTC)=[the theoretical toxicity index (TTI) of mixture actual measurement toxicity index (ATI)/mixture] × 100
When CTC≤80, then composition shows as antagonism, and as 80 < CTC < 120, then composition shows as summation action, and when CTC >=120, then composition shows as synergistic effect.
Table 1 isopyrazam and the composite Toxicity Determination result to cucumber powdery mildew's pathogen of fluoxastrobin
In table 1, result shows, isopyrazam and fluoxastrobin, when proportioning 1:50 ~ 50:1, show as synergistic effect to cucumber powdery mildew's pathogen, and especially when 1:10 ~ 10:1, synergistic effect is the most obvious, and co-toxicity coefficient is all more than 183.
Assays Example 2: isopyrazam and the composite Toxicity Determination to wheat powdery mildew of fluoxastrobin
Subjects: wheat powdery mildew (Erysiphegraminis) (pick up from field Wild Wheats powdery mildew bacterial classification, and through separation and purification)
Test method: test, with reference to People's Republic of China (PRC) agricultural industry criteria NY/T1156.4-2006 " farm-chemical indoor determination test rule bactericide the 4th part: method cut out by control wheat powdery mildew test basin ", adopts basin method of cutting out to measure.
Select susceptible wheat breed potted plant, treat that seedling grew to for 2 leaf-3 leaf phases for subsequent use.The former medicine of isopyrazam and the former medicine of the phonetic bacterium of fluorine use dimethyl formamide and acetone solution respectively, then dilute with 0.1% Tween-80 aqueous surfactant solution.Often process 3 basins, the strain of every basin 10, repeat for 4 times, 10ml liquid is evenly sprayed on wheat seedling and soaks to whole, treat that liquid dries naturally for subsequent use, and establish the process only containing solvent and surfactant not containing active ingredient to make blank.24h before chemicals treatment, evenly shakes off to be inoculated on the 2-3 leaf phase potted plant wheat seedling of process by the Powdery Mildew Fresh spores produced in 24h on morbidity wheat leaf blade, cultivates under inoculation is placed on suitable condition.Wait to contrast wheat fully to fall ill all blades of " Invest, Then Investigate " every basin wheat seedling, and calculate disease index and the control efficiency of each process.
Stage division is as follows:
0 grade: anosis;
1 grade: lesion area accounts for less than 5% of one-piece blade area;
3 grades: lesion area accounts for the 6-15% of one-piece blade area;
5 grades: lesion area accounts for the 16-25% of one-piece blade area;
7 grades: lesion area accounts for the 26-50% of one-piece blade area;
9 grades: lesion area accounts for more than 50% of one-piece blade area.
Drug effect together malicious coefficient calculation method with above-described embodiment 1.
Table 2 isopyrazam and the composite Toxicity Determination result to wheat powdery mildew of fluoxastrobin
In table 2, result shows, isopyrazam and fluoxastrobin, when proportioning 1:50 ~ 50:1, show as synergistic effect to wheat powdery mildew, and time especially between 1:10 ~ 10:1, listed proportioning co-toxicity coefficient is all higher than 187, and synergistic effect is more obvious.
Bactericidal composition of the present invention can be prepared into the suspending agent of applicable agricultural use, water dispersible granules or wetting powder by known method.The following stated is only the good embodiment of the present invention, only in order to explain the present invention, therefore can not be interpreted as the restriction to the scope of the claims of the present invention.
Suspending agent embodiment
The ratio of each components such as active component, dispersant, wetting agent, defoamer, antifreezing agent, thickener, preservative and water in formula is mixed, after sand milling or high speed shear, obtains semi-finished product, add water after analysis and mix filtration and namely obtain suspending agent.
Example of formulations 1,25.5% isopyrazam fluoxastrobin suspending agent
Isopyrazam 0.5%, fluoxastrobin 25%, alkylphenol polyoxyethylene (dispersant) 3%, pull open powder (wetting agent) 1%, xanthans (thickener) 0.2%, ethylene glycol (antifreezing agent) 4%, 20% aqueous emulsion of dimethyl polysiloxane fluid (defoamer) 0.4%, Sodium Benzoate (preservative) 0.2%, water is supplemented to 100%.
Example of formulations 2,10% isopyrazam fluoxastrobin suspending agent
Isopyrazam 5%, fluoxastrobin 5%, polycarboxylate (dispersant) 3%, lauryl sodium sulfate (wetting agent) 1%, xanthans (thickener) 0.15%, ethylene glycol (antifreezing agent) 4%, 20% aqueous emulsion of dimethyl polysiloxane fluid (defoamer) 0.4%, Sodium Benzoate (preservative) 0.2%, water are supplemented to 100%.
Example of formulations 3,30% isopyrazam fluoxastrobin suspending agent
Isopyrazam 25%, fluoxastrobin 5%, polyoxyethylene carboxylate (dispersant) 4%, bay alcohol radical sodium sulphate (wetting agent) 2%, xanthans (thickener) 0.2%, ethylene glycol (antifreezing agent) 4%, 20% aqueous emulsion of dimethyl polysiloxane fluid (defoamer) 0.4%, Sodium Benzoate (preservative) 0.2%, water are supplemented to 100%.
Example of formulations 4,5% isopyrazam fluoxastrobin suspending agent
Isopyrazam 2%, fluoxastrobin 3%, calcium lignosulfonate (dispersant) 3%, soapberry powder (wetting agent) 1%, xanthans (thickener) 0.15%, ethylene glycol (antifreezing agent) 4%, 20% aqueous emulsion of dimethyl polysiloxane fluid (defoamer) 0.4%, Sodium Benzoate (preservative) 0.15%, water are supplemented to 100%.
Water dispersible granules embodiment
By pesticide activity component, dispersant, wetting agent, disintegrant and filler mixing mixing, through coarse crushing and air-flow crushing, then carry out mediating and extruder grain, through sieving obtained water dispersible granules product after drying.
Example of formulations 5,80% isopyrazam fluoxastrobin water dispersible granules
Isopyrazam 72%, fluoxastrobin 8%, lauryl sodium sulfate (wetting agent) 3%, calcium lignosulfonate (dispersant) 8%, ammonium sulfate (disintegrant) 3%, kaolin (filler) complement to 100%.
Example of formulations 6,50% isopyrazam fluoxastrobin water dispersible granules
Isopyrazam 2.5%, fluoxastrobin 47.5%, bay alcohol radical sodium sulphate (wetting agent) 2.5%, calcium lignosulfonate (dispersant) 6%, urea (disintegrant) 3%, kaolin (filler) complement to 100%.
Example of formulations 7,42% isopyrazam fluoxastrobin water dispersible granules
Isopyrazam 40%, fluoxastrobin 2%, soapberry powder (wetting agent) 3%, calcium lignosulfonate (dispersant) 7%, bentonite (disintegrant) 3%, kaolin (filler) complement to 100%.
Wetting powder embodiment
Pesticide activity component, wetting agent, dispersant, diffusant and filler etc. are mixed in proportion successively, after air-flow crushing, mixing obtains wetting powder product again.
Example of formulations 8,30% isopyrazam fluoxastrobin wetting powder
Isopyrazam 5%, fluoxastrobin 25%, lauryl sodium sulfate (wetting agent) 2.5%, calcium lignosulfonate (dispersant) 6%, naphthalene sulfonate (diffusant) 3%, kaolin (filler) complement to 100%.
Example of formulations 9,22% isopyrazam fluoxastrobin wetting powder
Isopyrazam 2%, fluoxastrobin 20%, bay alcohol radical sodium sulphate (wetting agent) 3%, calcium lignosulfonate (dispersant) 6%, naphthalene sulfonate (diffusant) 3%, white carbon (filler) 8%, bentonite (filler) complement to 100%.
Example of formulations 10,15% isopyrazam fluoxastrobin wetting powder
Isopyrazam 10%, fluoxastrobin 5%, lauryl sodium sulfate (wetting agent) 2.5%, calcium lignosulfonate (dispersant) 5%, naphthalene sulfonate (diffusant) 3%, white carbon (filler) 6%, convex-concave rod stone (filler) complement to 100%.
Example of formulations 11,25% isopyrazam fluoxastrobin wetting powder
Isopyrazam 24.5%, fluoxastrobin 0.5%, lauryl sodium sulfate (wetting agent) 3%, calcium lignosulfonate (dispersant) 6%, naphthalene sulfonate (diffusant) 3%, white carbon (filler) 8%, kaolin (filler) complement to 100%.
Field information example 1: isopyrazam and the composite field control effectiveness test to powdery mildew of strawberry of fluoxastrobin
Test and carry out in Fanyu District, Guangzhou, Guangdong in April, 2014, experimental field powdery mildew of strawberry over the years occurs serious.Test medicine and dosage refer to table 3, often process 4 times and repeat, plot area 20m
2, Gong44Ge community, random district group arranges.Adopt conventional spray-on process, liquid consumption is 750L/hm
2, evenly spray complete stool, do not drip for degree to squirt blade.Carry out first time dispenser at powdery mildew of strawberry their early stage, after 7 days, carry out second time dispenser, separately establish clear water to be treated to blank.Before dispenser, investigate state of an illness radix, second time medicine before and second time dispenser after 10 days investigation prevention effects.Every community adopts diagonal 5 sampling, and often some investigation 3 strains, whole blade is investigated in every strain, records total number of sheets, the sick number of sheets, records the sick number of sheets at different levels, calculates disease index and preventive effect.
Stage division:
0 grade: without scab;
1 grade: lesion area accounts for less than 5% of whole leaf area;
3 grades: lesion area accounts for the 6-15% of whole leaf area;
5 grades: lesion area accounts for the 16-25% of whole leaf area;
7 grades: lesion area accounts for the 26-50% of whole leaf area;
9 grades: lesion area accounts for more than 51% of whole leaf area.
Drug effect computational methods:
Table 3 isopyrazam and the composite field test results to powdery mildew of strawberry of fluoxastrobin
Field test results shows, 25.5% isopyrazam fluoxastrobin suspending agent, 10% isopyrazam fluoxastrobin suspending agent, 30% isopyrazam fluoxastrobin suspending agent, 5% isopyrazam fluoxastrobin suspending agent, 80% isopyrazam fluoxastrobin water dispersible granules, 30% isopyrazam fluoxastrobin wetting powder, 22% isopyrazam fluoxastrobin wetting powder and 25% isopyrazam fluoxastrobin wetting powder have good control efficiency to powdery mildew of strawberry, and effective ingredient consumption presses 25g.a.i./hm respectively
2, 24g.a.i./hm
2, 20g.a.i./hm
2, 22g.a.i./hm
2, 20g.a.i./hm
2, 25g.a.i./hm
2, 25g.a.i./hm
2and 20g.a.i./hm
2control efficiency before second time dispenser is respectively: 79.58%, 87.71%, 83.54%, 89.52%, 81.49%, 90.34%, 82.16% and 80.64%, after second time dispenser, the control efficiency of 10 days is respectively 88.48%, 95.36%, 92.02%, 97.30%, 90.25%, 98.42%, 91.01% and 89.75%, is obviously better than contrast medicament 30% isopyrazam suspending agent effective ingredient consumption 20g.a.i./hm
2preventive effect 68.78% and 76.05% and 10% fluoxastrobin missible oil effective ingredient consumption 30g.a.i./hm
2preventive effect 61.03% and 69.00%, under corresponding test dose, reagent agent effectively can control the occurrence injury of powdery mildew of strawberry.Duration of test, reagent agent, to trial crops safety, occurs, to non-target organism safety without poisoning.
Field information example 2: isopyrazam and the composite field control effectiveness test to grape powdery mildew of fluoxastrobin
Test and carry out in Yangling District Li Tai township of Xianyang, Shanxi province city in June, 2013, grape powdery mildew over the years occurs serious.Test medicine and dosage refer to table 4, often process 4 times and repeat, plot area 20m
2, Gong44Ge community, random district group arranges.Adopt conventional spray-on process, liquid consumption is 1500L/hm
2, evenly spray complete stool, do not drip for degree to squirt blade.Carry out first time dispenser at grape powdery mildew their early stage, after 20 days, carry out second time dispenser, separately establish clear water to be treated to blank.Before dispenser, investigate state of an illness radix, second time medicine before and second time dispenser after 12 days investigation prevention effects.10 young sprouts are investigated in every community, and every tip is instituted an inquiry from the 5th leaf from top to bottom, and investigate 5-10 leaves, every sheet leaf accounts for the percentage classification of one-piece blade area by lesion area, and record investigation total leaf number, the sick number of sheets at different levels, calculate disease index and control efficiency.
Stage division:
0 grade: without scab;
1 grade: lesion area accounts for less than 5% of whole leaf area;
3 grades: lesion area accounts for the 6%-10% of whole leaf area;
5 grades: lesion area accounts for the 11%-20% of whole leaf area;
7 grades: lesion area accounts for the 21%-40% of whole leaf area;
9 grades: lesion area accounts for more than 40% of whole leaf area.
Drug effect computational methods:
Table 4 isopyrazam and the composite field test results to grape powdery mildew of fluoxastrobin
Field test results shows, 25.5% isopyrazam fluoxastrobin suspending agent, 10% isopyrazam fluoxastrobin suspending agent, 30% isopyrazam fluoxastrobin suspending agent, 5% isopyrazam fluoxastrobin suspending agent, 80% isopyrazam fluoxastrobin water dispersible granules, 30% isopyrazam fluoxastrobin wetting powder, 22% isopyrazam fluoxastrobin wetting powder and 25% isopyrazam fluoxastrobin wetting powder have good control efficiency to grape powdery mildew, and effective ingredient consumption presses 25mg/kg respectively, 20mg/kg, 15mg/kg, 20mg/kg, 15mg/kg, 20mg/kg, 20mg/kg and 15mg/kg, the control efficiency before second time dispenser is respectively: 79.66%, 86.19%, 82.15%, 89.64%, 83.25%, 89.40%, 84.08% and 81.01%, after second time dispenser, the control efficiency of 12 days is respectively 86.91%, 93.98%, 91.01%, 96.85%, 88.94%, 97.85%, 90.87% and 89.58%, obviously be better than the preventive effect 60.61% and 67.11% of preventive effect 71.48% and the 76.90% and 10% fluoxastrobin missible oil effective ingredient consumption 25mg/kg contrasting medicament 30% isopyrazam suspending agent effective ingredient consumption 15mg/kg, reagent agent effectively can control the occurrence injury of grape powdery mildew under corresponding test dose, has doublely control effect to homochronous downy mildew of garpe.Duration of test, reagent agent, to trial crops safety, occurs, to beneficial organism safety such as honeybee and natural enemy oophagous trichogrammaes without poisoning.
Claims (6)
1. a bactericidal composition, is characterized in that: the active ingredient of described bactericidal composition is isopyrazam and fluoxastrobin, and both mass ratioes are 1:50 ~ 50:1.
2. bactericidal composition according to claim 1, is characterized in that: the mass ratio of isopyrazam and fluoxastrobin is 1:20 ~ 20:1.
3. bactericidal composition according to claim 2, is characterized in that: the mass ratio of isopyrazam and fluoxastrobin is 1:10 ~ 10:1.
4. the bactericidal composition according to any one of claims 1 to 3, is characterized in that: the gross mass percentage composition of active ingredient is 3% ~ 80%.
5. bactericidal composition according to claim 4, is characterized in that: the formulation of described bactericidal composition is suspending agent, water dispersible granules or wetting powder.
6. the application of bactericidal composition described in claims 1 to 3 in control crop powdery mildew.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1072223C (en) * | 1996-01-22 | 2001-10-03 | 拜尔公司 | Halogenated pyrimidines, their preparation process and pesticides containing them |
| CN101035432A (en) * | 2004-10-08 | 2007-09-12 | 辛根塔参与股份公司 | Synergistic fungicidal composition |
| WO2010086103A2 (en) * | 2009-01-30 | 2010-08-05 | Bayer Cropscience Aktiengesellschaft | Use of succinate dehydrogenase inhibitors for controlling powdery mildew primary infections |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1072223C (en) * | 1996-01-22 | 2001-10-03 | 拜尔公司 | Halogenated pyrimidines, their preparation process and pesticides containing them |
| CN101035432A (en) * | 2004-10-08 | 2007-09-12 | 辛根塔参与股份公司 | Synergistic fungicidal composition |
| WO2010086103A2 (en) * | 2009-01-30 | 2010-08-05 | Bayer Cropscience Aktiengesellschaft | Use of succinate dehydrogenase inhibitors for controlling powdery mildew primary infections |
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