CN101341873B - Agricultural chemical composition for preventing and controlling wheat powdery mildew and wheat aphid, aqueous emulsion and method of preparing the aqueous emulsion - Google Patents
Agricultural chemical composition for preventing and controlling wheat powdery mildew and wheat aphid, aqueous emulsion and method of preparing the aqueous emulsion Download PDFInfo
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- CN101341873B CN101341873B CN2008101194827A CN200810119482A CN101341873B CN 101341873 B CN101341873 B CN 101341873B CN 2008101194827 A CN2008101194827 A CN 2008101194827A CN 200810119482 A CN200810119482 A CN 200810119482A CN 101341873 B CN101341873 B CN 101341873B
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Abstract
The invention provides an agricultural chemical compound used to prevent wheat powdery mildew and wheat aphid, water emulsion thereof and a preparation method of the water emulsion. The compound comprises diniconazole and high-efficiency cypermethrin, and the weight ratio is 1 to 10:1 to 10. The water emulsion of the compound is prepared with solvent, surface active agent, anti-freeze agent, thickening agent, foam killer and water. Apart from effective components, most of the preparation is water and only a little is organic solvent, which can greatly reduce the pollution to the environment; therefore, the compound is environment protective agricultural chemical novel preparation. The water emulsion can prevent wheat powdery mildew and wheat aphid at the same time with obvious effect; compared with the prior preparation, the compound can reduce the spraying times, improve the prevention effect and reduce labor and cost.
Description
Technical field
The present invention relates to a kind of composition pesticide, particularly relate to a kind of composition pesticide and aqueous emulsion thereof that is used to prevent and treat wheat powdery mildew and wheat aphid, the invention still further relates to the preparation method of this aqueous emulsion simultaneously.
Background technology
Spring, wheat powdery mildew and wheat aphid were easy to take place simultaneously, can cause the heavy losses of wheat yield.For these two kinds of pests, traditional method is to use insecticides such as bactericide such as alkene azoles alcohol, triazolone and beta-cypermethrin, sumicidin to prevent and treat respectively, has so both increased spraying times and recruitment cost, increases the weight of the influence of agricultural chemicals to environment again.By with the pure and mild efficient cypermethrin compounded use of alkene azoles, can prevent and treat wheat powdery mildew and wheat aphid simultaneously, reach the effect of " spray is how anti-", can also reduce the influence of recruitment cost and agricultural chemicals to environment.
Beta-cypermethrin (beta-cypermethrin), chemical name is: 2,2-dimethyl-3-(2, the 2-dichloroethylene) cyclopropane-carboxylic acid-alpha-cyano-(3-phenoxy group)-benzyl ester.It is a kind of pyrethroid insecticides, is the efficient isomer of cypermethrin.Be soluble in aromatic hydrocarbons, ketone and alcohols.To female rat acute per os LD
50Be 166mg/kg, acute through skin LD
505000mg/kg, the rabbit skin there is spread effect, its eyes there is the minimal irritation effect.
The beta-cypermethrin structural formula
Beta-cypermethrin biologically active height has and tags and stomach poison function.Its insecticidal spectrum is wide, the speed of knocking down is fast, is applicable to insect, especially aphid on the various crop such as control wheat, cotton, vegetables, fruit tree.
Alkene azoles alcohol (diniconazole), chemical name: (E)-(RS)-and 1-(2,4 dichloro benzene base)-4,4-dimethyl-2-(1H-1,2,4-triazol-1-yl) penta-1 alkene-3-alcohol.Belong to triazole bactericidal agent, have protection, treatment and interior suction bactericidal action, its mechanism of action is the 14 α-demethylation effect that suppresses in the biosynthesis of fungi ergosterol, causes that ergosterol lacks, and causes fungal cell membrane undesired, finally makes fungi death.
Alkene azoles alcohol structural formula
Alkene azoles alcohol is to people and animals' low toxicity, and to useful insect, Environmental security, and fungicidal spectrum is wide, and preventive effect is remarkable, and the lasting period is permanent.Be applicable to the powdery mildew of preventing and treating on the various crop.
Because the fusing point of alkene azoles alcohol is higher, easily crystallization is separated out in water, does not also have the report about the diniconazole water emulsion product so far.In the present invention, by the screening of suitable solvent and other auxiliary agent, to obtain the qualified diniconazole water emulsion of every index.
In the medicament for control wheat aphid and powdery mildew, formulation is based on missible oil and wetting powder, and the use of dust pollution and a large amount of organic solvents causes very big harmful effect to environment.Alkene azoles alcohol and beta-cypermethrin are prepared into aqueous emulsion, and water replaces most of organic solvent to use, and can reduce the influence to environment greatly.
Summary of the invention
The object of the invention provides a kind of composition pesticide that is used to prevent and treat wheat powdery mildew and wheat aphid, with the problem of aspects such as solving chemistry security and use, damage by disease and insect is prevented and treated simultaneously.
Another object of the present invention provides a kind of aqueous emulsion that comprises said composition.
Further object of the present invention provides a kind of preparation method of this aqueous emulsion.
The invention provides a kind of composition pesticide that is used to prevent and treat wheat powdery mildew and wheat aphid, it comprises the pure and mild beta-cypermethrin of alkene azoles, and its weight proportion is 1～10:1～10.
The present invention is used to prevent and treat the composition pesticide of wheat powdery mildew and wheat aphid, and preferably, the weight proportion of the pure and mild beta-cypermethrin of described alkene azoles is 3～8:3～8.
The present invention is used to prevent and treat the composition pesticide of wheat powdery mildew and wheat aphid, and more preferably, the weight proportion of the pure and mild beta-cypermethrin of described alkene azoles is 1:1.
Proportioning screening is: measure alkene azoles alcohol, beta-cypermethrin and the two with 10:1 with leaf dipping method and wheat leaf section method respectively, and 5:1,1:1,1:5, the 1:10 equal proportion is mixed to the virulence of wheat powdery mildew and wheat aphid.When screening draws the pure and mild beta-cypermethrin of alkene azoles and is mixed in varing proportions, can prevent and treat wheat powdery mildew and wheat aphid simultaneously, some ratio has obvious synergistic effect to wheat powdery mildew and wheat aphid, when the two ratio is 1:1, the synergistic effect of wheat powdery mildew and wheat aphid is maximum.
The present invention also provides a kind of aqueous emulsion that comprises above-mentioned composition pesticide, and wherein said aqueous emulsion comprises following component by weight percentage: alkene azoles alcohol 1%～10%, beta-cypermethrin 1%～10%, solvent 5%～20%, surfactant 5%～20%, antifreeze 1%～5%, thickener 0.1%～3%, defoamer 0.1%～1%, water surplus.
Described solvent is selected from one or more in water-fast aromatic hydrocarbon, fatty alcohol and the vegetable oil, and preferred solvent is a vegetable oil.
Described surfactant is selected from one or more in castor oil polyoxyethylene ether, styrene phenol polyoxyethylene poly-oxygen propylene aether, alkyl phenol formaldehyde resin polyoxyethylene ether, alkylaryl polyoxyethylene polyoxypropylene ether, alkyl phenol and ethylene oxide condensate and the alkyl benzene calcium sulfonate.
Described antifreeze is selected from one or more in ethylene glycol, propane diols, glycerine and the urea, and preferred antifreeze is a propane diols.
Described thickener is selected from one or more in xanthans, CMC, gum Arabic, gelatin, agar and modified starch and the derivative thereof, and preferred thickening is an xanthans.
Described defoamer is selected from one or more among polyether antifoam agent, organic silicone and the defoamer S.
Water of the present invention is distilled water or running water, preferred running water.
The preparation method of aqueous emulsion of the present invention comprises the following steps: the pure and mild beta-cypermethrin of alkene azoles to form the oil phase of homogeneous with solvent and surfactant fusion; Water, antifreeze, thickener and defoamer are mixed, form the water of homogeneous; 50～100 ℃, stirred 5～60 minutes down at 1000～20000 rev/mins, pour water into oil phase, or pour oil phase into water, form average grain diameter at the aqueous emulsion below 10 microns.
Aqueous emulsion is a pesticides new formulation, is water-fast original liquid body or solid are dissolved in a small amount of organic solvent a kind of pesticidal preparations that the liquid dispersion of gained forms in water.Outward appearance is an opaque and white emulsion.In the present invention, water replaces most organic solvent, and is therefore safe in utilization, also can reduce the pollution to environment.
By a certain percentage to the water mixing, spraying is used, and can be used for preventing and treating wheat powdery mildew and wheat aphid with aqueous emulsion of the present invention.
The present invention proves through effect experiment, can prevent and treat wheat powdery mildew and wheat aphid simultaneously, and effect is remarkable.Compare with wheat aphid with the insecticide control wheat powdery mildew with using bactericide respectively, the present invention can reduce spraying times, improves control efficiency, reduces the recruitment cost, also can alleviate the pollution to environment.
Embodiment
Following examples are used to illustrate the present invention, but are not used for limiting the scope of the invention.
Embodiment 1
The aqueous emulsion of the composition pesticide of control wheat powdery mildew of the present invention and wheat aphid comprises following component: alkene azoles alcohol 5.0 grams, beta-cypermethrin 5.0 grams, rapeseed oil 14.0 grams, castor oil polyoxyethylene ether EL-2014.0 gram, xanthans 0.25 gram, propane diols 3.5 grams, organic silicone 0.2 gram, water 58.05 grams.
Its preparation process is as follows: the pure and mild beta-cypermethrin of alkene azoles with rapeseed oil and the fusion of surfactant castor oil polyoxyethylene ether, is formed the oil phase of homogeneous; Water, propane diols, xanthans and defoamer organic silicone are mixed, form the water of homogeneous; 80 ℃, stirred 10 minutes down at 4000 rev/mins, pour water into oil phase, the product average grain diameter is 1.5 μ m.
Embodiment 2
The aqueous emulsion of the composition pesticide of control wheat powdery mildew of the present invention and wheat aphid comprises following component: alkene azoles alcohol 5.0 grams, beta-cypermethrin 5.0 grams, soybean oil 18.0 grams, styrene phenol polyoxyethylene poly-oxygen propylene aether 16.0 grams, xanthans 0.25 gram, glycerine 1.5 grams, organic silicone 0.2 gram, water 54.05 grams.
Its preparation process is as follows: the pure and mild beta-cypermethrin of alkene azoles with soybean oil and the fusion of styrene phenol polyoxyethylene poly-oxygen propylene aether, is formed the oil phase of homogeneous; Water, glycerine, xanthans and defoamer organic silicone are mixed, form the water of homogeneous; 90 ℃, stirred 15 minutes down at 5000 rev/mins, pour water into oil phase, the product average grain diameter is 1.5 μ m.
Embodiment 3
The aqueous emulsion of the composition pesticide of control wheat powdery mildew of the present invention and wheat aphid comprises following component: alkene azoles alcohol 5.0 grams, beta-cypermethrin 5.0 grams, dimethylbenzene 20.0 grams, alkylaryl polyoxyethylene polyoxypropylene ether 14.0 grams, gum Arabic 0.25 gram, ethylene glycol 3.5 grams, polyether antifoam agent 0.2 gram, water 52.05 grams.
Its preparation process is as follows: with the alkylaryl polyoxyethylene polyoxypropylene ether fusion of the pure and mild beta-cypermethrin of alkene azoles, form the oil phase of homogeneous; Water, ethylene glycol, gum Arabic and polyether antifoam agent are mixed, form the water of homogeneous; 70 ℃, stirred 8 minutes down at 3000 rev/mins, pour oil phase into water, the product average grain diameter is 5.0 μ m.
Embodiment 4
The aqueous emulsion of the composition pesticide of control wheat powdery mildew of the present invention and wheat aphid comprises following component: alkene azoles alcohol 9.0 grams, beta-cypermethrin 1.0 grams, kerosene 16.0 grams, oxirane propylene oxide block copolymer 12.5 grams, CMC 0.25 gram, propane diols 5 grams, organic silicone 0.2 gram, water 56.05 grams.
Its preparation process is as follows: the pure and mild beta-cypermethrin of alkene azoles with kerosene and the fusion of oxirane propylene oxide block copolymer, is formed the oil phase of homogeneous; Water, propane diols, CMC and defoamer organic silicone are mixed, form the water of homogeneous; 80 ℃, stirred 15 minutes down at 4000 rev/mins, pour water into oil phase, the product average grain diameter is 3.0 μ m.
Embodiment 5
The aqueous emulsion of the composition pesticide of control wheat powdery mildew of the present invention and wheat aphid comprises following component: alkene azoles alcohol 5.0 grams, beta-cypermethrin 10.0 grams, rapeseed oil 14.0 grams, emulsifier castor oil polyoxyethylene ether 15.0 grams, xanthans 0.3 gram, ethylene glycol 4.0 grams, defoamer S0.3 gram, water 51.4 grams.
Its preparation process is as follows: the pure and mild beta-cypermethrin of alkene azoles with rapeseed oil and the fusion of surfactant castor oil polyoxyethylene ether, is formed the oil phase of homogeneous; Water, ethylene glycol, xanthans and defoamer S are mixed, form the water of homogeneous; 80 ℃, stirred 10 minutes down at 3000 rev/mins, pour water into oil phase, the product average grain diameter is 6.5 μ m.
Embodiment 6
The aqueous emulsion of the composition pesticide of control wheat powdery mildew of the present invention and wheat aphid comprises following component: alkene azoles alcohol 8.0 grams, beta-cypermethrin 2.0 grams, soybean oil 18.0 grams, styrene phenol polyoxyethylene poly-oxygen propylene aether 14.0 grams, xanthans 0.2 gram, propane diols 4.0 grams, organic silicone S0.2 gram, water 53.6 grams.
Its preparation process is as follows: the pure and mild beta-cypermethrin of alkene azoles with soybean oil and the fusion of styrene phenol polyoxyethylene poly-oxygen propylene aether, is formed the oil phase of homogeneous; Water, propane diols, xanthans and defoamer organic silicone are mixed, form the water of homogeneous; 85 ℃, stirred 20 minutes down at 4000 rev/mins, pour water into oil phase, the product average grain diameter is 1.5 μ m.
Embodiment 7
The aqueous emulsion of the composition pesticide of control wheat powdery mildew of the present invention and wheat aphid comprises following component: alkene azoles alcohol 2.0 grams, beta-cypermethrin 8.0 grams, kerosene 16 grams, oxirane propylene oxide block copolymer 14.0 grams, xanthans 0.5 gram, urea 3.5 grams, defoamer S0.2 gram, water 55.8 grams.
Its preparation process is as follows: the pure and mild beta-cypermethrin of alkene azoles with kerosene and the fusion of oxirane propylene oxide block copolymer, is formed the oil phase of homogeneous; Water, urea, xanthans and defoamer S are mixed, form the water of homogeneous; 70 ℃, stirred 10 minutes down at 3000 rev/mins, pour oil phase into water, the product average grain diameter is 3.0 μ m.
Embodiment 8
The aqueous emulsion of the composition pesticide of control wheat powdery mildew of the present invention and wheat aphid comprises following component: alkene azoles alcohol 1.0 grams, beta-cypermethrin 9.0 grams, kerosene 16.0 grams, oxirane propylene oxide block copolymer 14.0 grams, xanthans 0.25 gram, propane diols 3.5 grams, defoamer S0.2 gram, water 56.05 grams.
Its preparation process is as follows: the pure and mild beta-cypermethrin of alkene azoles with kerosene and the fusion of oxirane propylene oxide block copolymer, is formed the oil phase of homogeneous; Water, propane diols, xanthans and defoamer S are mixed, form the water of homogeneous; 60 ℃, stirred 15 minutes down at 3000 rev/mins, pour oil phase into water, the product average grain diameter is 3.0 μ m.
Experimental example 1 carries out potted plant effect experiment with the aqueous emulsion that the embodiment of the invention 2 obtains
Test method: on potted plant wheat seedling, insert wheat aphid and wheat powdery mildew, when treating that wheat morbidity, aphid are about 60 of every basin, with miniaturised nebuliser after with a certain amount of dilute with water 10% alkene azoles alcohol high performance aqueous emulsion of cypermethrin and two kinds of single agent (12.5% alkene azoles alcohol wetting powder, 4.5% r) to the wheat processing of spraying respectively, with the clear water is contrast, 3 repetitions of every processing.Check aphid extant number and powdery mildew disease index behind the certain hour, calculate control efficiency (%).
Table 1 medicament is to the control efficiency of wheat aphid
As shown in Table 1, application concentration is the aqueous emulsion of 15 and 20 μ g/mL, control efficiency to 1d behind the wheat aphid medicine is respectively 88.89% and 93.75%, and the control efficiency of 3d is 92.65% and 95.59% after the dispenser, and the control efficiency of 7d reaches 88.16% and 90.79% after the dispenser.Therefrom as can be seen, the effect of the aqueous emulsion of 20 μ g/mL control wheat aphid is all obviously than the height of 20 μ g/mL beta-cypermethrin list agent, and 15 μ g/mL aqueous emulsions behind 5 days, medicine behind the medicine 7 days to the effect of wheat aphid also obviously than the height of 20 μ g/mL beta-cypermethrin list agent.
Table 2 medicament is to the control efficiency of wheat powdery mildew
As shown in Table 2, application concentration is the aqueous emulsion of 15 and 20 μ g/mL, and the control efficiency of 7d after the dispenser of wheat powdery mildew is respectively 79.7% and 85.2%, and the control efficiency of 7d reaches 82.6% and 87.1% respectively after the secondary dispenser.20 μ g/mL aqueous emulsions are higher than single agent alkene azoles alcohol wetting powder to the control efficiency of wheat powdery mildew.
Result of the test shows: 10% alkene azoles alcohol high performance aqueous emulsion of cypermethrin has outstanding control efficiency to wheat aphid and wheat powdery mildew.
Experimental example 2 carries out potted plant effect experiment with the aqueous emulsion that the embodiment of the invention 6 obtains
Test method: with experimental example 1.
Table 3 medicament is to the control efficiency of wheat aphid
Table 3 shows, although application concentration be the aqueous emulsion of 15 μ g/mL to the control efficiency of wheat aphid a little less than 20 μ g/mL beta-cypermethrin list agent, the control efficiency of 20 μ g/mL aqueous emulsions is all obviously than the height of 20 μ g/mL beta-cypermethrin list agent.
Table 4 medicament is to the control efficiency of wheat powdery mildew
As shown in Table 4, application concentration is the aqueous emulsion of 15 and 20 μ g/mL, and the control efficiency of 7d after the dispenser of wheat powdery mildew is respectively 81.6% and 84.9%, and the control efficiency of 7d reaches 86.5% and 88.9% respectively after the secondary dispenser.20 μ g/mL aqueous emulsions are higher than single agent to the control efficiency of wheat powdery mildew.
Result of the test shows: 10% alkene azoles alcohol high performance aqueous emulsion of cypermethrin has good control efficiency to wheat aphid and wheat powdery mildew.
Claims (3)
1. aqueous emulsion that is used to prevent and treat the composition pesticide of wheat powdery mildew and wheat aphid, it is characterized in that described aqueous emulsion comprises following component by weight percentage: alkene azoles alcohol 1%～10%, beta-cypermethrin 1%～10%, solvent 5%～20%, surfactant 5%～20%, antifreeze 1%～5%, thickener 0.1%～3%, defoamer 0.1%～1%, water surplus; Wherein, described solvent is selected from one or more in water-fast aromatic hydrocarbon, fatty alcohol and the vegetable oil; Described surfactant is selected from one or more in castor oil polyoxyethylene ether, styrene phenol polyoxyethylene poly-oxygen propylene aether, alkyl phenol formaldehyde resin polyoxyethylene ether, alkylaryl polyoxyethylene polyoxypropylene ether, alkyl phenol and ethylene oxide condensate and the alkyl benzene calcium sulfonate; Described antifreeze is selected from one or more in ethylene glycol, propane diols, glycerine and the urea; Described thickener is selected from one or more in xanthans, CMC, gum Arabic, gelatin, agar and modified starch and the derivative thereof; Described defoamer is selected from one or more among polyether antifoam agent, organic silicone and the defoamer S.
2. the composition pesticide of control wheat powdery mildew according to claim 1 and wheat aphid is characterized in that, the weight proportion of the pure and mild beta-cypermethrin of described alkene azoles is 3～8: 3～8.
3. a method for preparing claim 1 or 2 described aqueous emulsions is characterized in that, the pure and mild beta-cypermethrin of alkene azoles with solvent and surfactant fusion, is formed the oil phase of homogeneous; Water, antifreeze, thickener and defoamer are mixed, form the water of homogeneous; At 50～100 ℃, stirred 5～60 minutes down at 1000-20000 rev/min, pour water into oil phase, perhaps oil phase is poured into water, form average grain diameter at the aqueous emulsion below 10 microns.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2008101194827A CN101341873B (en) | 2008-09-01 | 2008-09-01 | Agricultural chemical composition for preventing and controlling wheat powdery mildew and wheat aphid, aqueous emulsion and method of preparing the aqueous emulsion |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2008101194827A CN101341873B (en) | 2008-09-01 | 2008-09-01 | Agricultural chemical composition for preventing and controlling wheat powdery mildew and wheat aphid, aqueous emulsion and method of preparing the aqueous emulsion |
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| CN101341873B true CN101341873B (en) | 2011-11-30 |
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| CN102057911B (en) * | 2010-01-20 | 2014-06-25 | 中国农业科学院植物保护研究所 | Bactericidal and pesticidal compound agent for wheat |
| CN102067802A (en) * | 2010-06-11 | 2011-05-25 | 中国农业科学院植物保护研究所 | Green energy-saving wheat aphid prevention and control technology |
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