A kind of pesticide for preventing and controlling agricultural aphids and its preparation method

Abstract

The present invention provides an agricultural aphid control agent and a preparation method thereof, which comprises 5-15 parts of pyrethroid insecticide components, 10-20 parts of nicotinamide insecticide components, 10-20 parts of emulsifiers, and a non-protonic polar solvent to make up 100 parts by weight. The present invention uses the pyrethroid insecticide components and the nicotinamide insecticide components in a specific ratio, so that the prepared agent has excellent effect on preventing and controlling cotton aphids, and the insecticidal effect is significantly improved compared with the single-ingredient agent on the market, and the drug effect is relatively long-lasting. At the same time, the present invention adopts a specific solvent system to promote the dissolution of the active ingredient, greatly improves the production efficiency, and ensures a higher productivity.

Description

Technical Field

[0001] The invention relates to the technical field of pesticides, and in particular to a pesticide for preventing and controlling agricultural aphids and a preparation method thereof. Background Art

[0002] Cotton is harmed by various pests and diseases during the planting period. The annual loss due to pests and diseases is 15% to 20%, and in severe cases it can reach more than 50%, or even a total crop failure. Through the prevention and control of pests and diseases, the annual loss that can be saved can reach more than 900,000 tons. Cotton aphids belong to the Aphididae family of the Hemiptera order. They are a worldwide pest. They mainly insert their piercing and sucking mouthparts into the back or tender part of cotton leaves to suck juice. The affected leaves curl back to the back, and there is honeydew excreted by aphids on the leaf surface, which often breeds mold. After cotton is damaged, the plants are short, the leaves become smaller, the number of leaves decreases, the buds appear late, and the number of buds and bolls decreases. Since the promotion of genetically modified cotton, although the main cotton pest, the bollworm, has been effectively controlled, the piercing and sucking pests such as cotton aphids and blind bugs have increased year by year. At present, the prevention and control of cotton aphids is mainly carried out by chemical control. However, due to the irrational and abuse of chemical pesticides during the chemical control process, while killing the pests, it also increases the resistance of cotton aphids to pesticides, resulting in poor control effects and increased control costs.

[0003] In order to effectively reduce the harm caused by aphids to crops and avoid serious losses, it is necessary to develop a pesticide with better control effect, which has great use value. Summary of the invention

[0004] In order to solve the above-mentioned problems, the present invention provides an agent for controlling agricultural aphids, which comprises 5-15 parts by weight of pyrethroid insecticide, 10-20 parts of nicotinimide insecticide, 10-20 parts of emulsifier, and 100 parts of aprotic polar solvent.

[0005] As a preferred technical solution, the pyrethroid insecticide ingredient is selected from one or more of ether-cypermethrin, pyrethrin, cypermethrin, deltamethrin, cis-cypermethrin, beta-cypermethrin, cyfluthrin, cypermethrin, cyfluthrin, cypermethrin, cypermethrin ether valerate, furanthrin, resmethrin, flucythrin, bifenthrin, fluthrin, cypermethrin fluvalerate, cypermethrin, valerate, cypermethrin, and d-allylthrin.

[0006] As a preferred technical solution, the aprotic polar solvent is a nitrogen-containing aprotic polar solvent.

[0007] As a preferred technical solution, the refractive index of the nitrogen-containing aprotic polar solvent at 20° C. is 1.2-1.6.

[0008] As a preferred technical solution, the emulsifier is an adduct of vegetable oleic acid ester and ethylene oxide.

[0009] As a preferred technical solution, the adduct of vegetable oleic acid ester and ethylene oxide is an adduct of EL series vegetable oleic acid ester and ethylene oxide and / or an adduct of BY series vegetable oleic acid ester and ethylene oxide.

[0010] As a preferred technical solution, the HLB value of the adduct of BY series vegetable oleic acid ester and ethylene oxide is 9-13.

[0011] Another aspect of the present invention provides a method for preparing an agent for controlling agricultural aphids, comprising: mixing a pyrethroid insecticide component, a nicotinimide insecticide component, an emulsifier and a non-protonic polar solvent to obtain the agent.

[0012] As a preferred technical solution, the preparation method of the agricultural aphid control agent comprises: adding an emulsifier and a non-protonic polar solvent into a stirring tank, then adding a pyrethroid insecticide component and a nicotinimide insecticide component, and stirring for 80-120 minutes to obtain the agent.

[0013] As a preferred technical solution, the preparation method of the agricultural aphid control agent comprises: adding an emulsifier and a non-protonic polar solvent into a stirred tank, then adding a pyrethroid insecticide component and a nicotinimide insecticide component, and stirring for 80-100 minutes to obtain the product.

[0014] Beneficial effects: The present invention uses pyrethroid insecticide components and nicotinimide insecticide components in a specific ratio, so that the prepared agent has excellent effect on preventing and controlling cotton aphids. Compared with single-ingredient agents on the market, the insecticidal effect is significantly improved and the efficacy is more lasting. At the same time, the present invention adopts a specific solvent system to promote the dissolution of active ingredients, greatly improves production efficiency, and ensures higher productivity. DETAILED DESCRIPTION

[0015] In order to achieve the above-mentioned object, the present invention provides an agent for controlling agricultural aphids, which comprises, by weight, 5-15 parts of pyrethroid insecticide components, 10-20 parts of nicotinimide insecticide components, 10-20 parts of emulsifiers, and a non-protonic polar solvent to make up 100 parts.

[0016] Preferably, the composition comprises 10 parts by weight of pyrethroid insecticide, 15 parts by weight of nicotinimide insecticide, 15 parts by weight of emulsifier, and the aprotic polar solvent makes up to 100 parts.

[0017] In some preferred embodiments, the pyrethroid insecticide ingredient is selected from one or more of ether-cypermethrin, pyrethrin, cypermethrin, deltamethrin, cis-cypermethrin, beta-cypermethrin, cyfluthrin, cypermethrin, cyfluthrin, cypermethrin, cypermethrin ether valerate, furanthrin, resmethrin, flucythrin, bifenthrin, fluthrin, cypermethrin acetyl cyanamide, thiamethoxam, cypermethrin, cypermethrin, cypermethrin, cypermethrin, cypermethrin, and d-allyl cypermethrin.

[0018] Preferably, the pyrethroid insecticide component is selected from one or more of bifenthrin, fluvalerate cyanamide, and allethrin.

[0019] More preferably, the pyrethroid insecticide ingredient is bifenthrin.

[0020] In some preferred embodiments, the aprotic polar solvent is a nitrogen-containing aprotic polar solvent.

[0021] In some preferred embodiments, the nitrogen-containing aprotic polar solvent has a refractive index of 1.2-1.6 at 20°C.

[0022] Preferably, the refractive index of the nitrogen-containing aprotic polar solvent at 20° C. is 1.4-1.5.

[0023] More preferably, the nitrogen-containing aprotic polar solvent is dimethylacetamide.

[0024] In some preferred embodiments, the emulsifier is an adduct of vegetable oleic acid ester and ethylene oxide.

[0025] In some preferred embodiments, the adduct of vegetable oleic acid ester and ethylene oxide is an adduct of EL series vegetable oleic acid ester and ethylene oxide and / or an adduct of BY series vegetable oleic acid ester and ethylene oxide.

[0026] In some preferred embodiments, the HLB value of the adduct of BY series vegetable oleic acid ester and ethylene oxide is 9-13.

[0027] Preferably, the HLB value of the adduct of the BY series vegetable oleic acid ester and ethylene oxide is 9-10.

[0028] More preferably, the HLB value of the adduct of the BY series vegetable oleic acid ester and ethylene oxide is 9.8.

[0029] Preferably, the adduct of the BY series vegetable oleic acid ester and ethylene oxide is castor oil polyoxyethylene ether, purchased from Xingtai Lantian Fine Chemical Co., Ltd., model number BY110.

[0030] Another aspect of the present invention provides a method for preparing an agent for controlling agricultural aphids, comprising: mixing a pyrethroid insecticide component, a nicotinimide insecticide component, an emulsifier and a non-protonic polar solvent to obtain the agent.

[0031] In some preferred embodiments, the method for preparing the agricultural aphid control agent comprises: adding an emulsifier and a non-protonic polar solvent into a stirred tank, then adding a pyrethroid insecticide component and a nicotinimide insecticide component, and stirring for 80-120 minutes to obtain the agent.

[0032] In some preferred embodiments, the preparation method of the agricultural aphid control agent comprises: adding an emulsifier and a non-protonic polar solvent into a stirred tank, then adding a pyrethroid insecticide component and a nicotinimide insecticide component, and stirring for 80-100 minutes.

[0033] The applicant found in the experiment that in the preparation method of the agricultural aphid control agent of the present application, at room temperature, the dissolution rate of the solid nitenpyram is very low, and a long period of stirring is required to dissolve the solvent. The stirring time exceeds 2 hours, which greatly affects the efficiency. If the temperature is increased during stirring, more foam will be generated at this time, which is not conducive to subsequent production. In addition, the applicant unexpectedly found that when a nitrogen-containing non-protonic polar solvent with a refractive index of 1.2-1.6 at 20°C, especially dimethylacetamide, is used, at this time, under the condition of the presence of a specific proportion of bifenthrin, nitenpyram and castor oil polyoxyethylene ether in the present application, the dissolution of nitenpyram and bifenthrin can be completed in a relatively short time. It is speculated that it may be under a non-protonic polar solvent with a specific refractive index condition. At this time, in the presence of the specific castor oil polyoxyethylene ether in the present application, bifenthrin and nitenpyram are easily wetted and penetrated by the solvent, eliminating the internal stress between the molecules, so that the surface molecules of bifenthrin and nitenpyram fully interact with the castor oil polyoxyethylene ether, promoting particle collapse and separation.

[0034] Example

[0035] Example 1

[0036] On the one hand, the present embodiment provides an agent for controlling agricultural aphids, which comprises, by weight, 10 parts of bifenthrin, 15 parts of nitenpyram, 15 parts of castor oil polyoxyethylene ether, and 60 parts of dimethylacetamide.

[0037] On the other hand, the present embodiment provides a method for preparing an agent for controlling agricultural aphids, comprising: adding castor oil polyoxyethylene ether and dimethylacetamide into a stirring tank, and then adding bifenthrin and nitenpyram, and stirring for 90 minutes to obtain the agent.

[0038] The castor oil polyoxyethylene ether was purchased from Xingtai Lantian Fine Chemical Co., Ltd., model number BY110.

[0039] Example 2

[0040] This embodiment provides an agent for controlling agricultural aphids and a preparation method thereof. The specific implementation method is the same as that of Example 1, except that the nitrogen-containing aprotic polar solvent is N,N-dimethylformamide.

[0041] Comparative Example 1

[0042] This comparative example is a 10% bifenthrin soluble liquid commonly available on the market.

[0043] The 10% bifenthrin soluble liquid was purchased from Jiangsu Yangnong Chemical Co., Ltd.

[0044] Comparative Example 2

[0045] This comparative example is a 15% nitenpyram soluble liquid commonly available on the market.

[0046] The 15% nitenpyram soluble liquid was purchased from Shandong Zhongnong United Biotechnology Co., Ltd.

[0047] Performance Testing

[0048] 1. The preparations prepared in Example 1 and Comparative Examples 1-2 were tested for their control effects on cotton aphids. The dosage per mu was 30 ml. The preparations were diluted in water (the concentration in water was 0.3%) and then sprayed on cotton plants. The test results after spraying were recorded. The results are shown in Table 1.

[0049] Table 1

[0050]

[0051] 2. Dissolution rate

[0052] The time for the solid of Example 1-2 to be completely dissolved was recorded during the preparation process. The results are shown in Table 2.

[0053] Table 2

[0054] serial number Solid complete dissolution time Example 1 82min Example 2 88min

[0055] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is possible for those skilled in the art to make improvements and changes based on the above description, and all such improvements and changes should fall within the scope of protection of the claims attached to the present invention.

Claims

1. A pesticide for controlling agricultural aphids, characterized in that: By weight, it includes 5-15 parts of pyrethroid insecticide, 10-20 parts of nicotinimide insecticide, 10-20 parts of emulsifier, and aprotic polar solvent to make up 100 parts; The aprotic polar solvent is a nitrogen-containing aprotic polar solvent; The nitrogen-containing aprotic polar solvent has a refractive index of 1.2-1.6 at 20° C.; The nitrogen-containing aprotic polar solvent is dimethylacetamide; The pyrethroid insecticide component is bifenthrin; The emulsifier is an adduct of vegetable oleic acid ester and ethylene oxide; The adduct of vegetable oleic acid ester and ethylene oxide is an adduct of EL series vegetable oleic acid ester and ethylene oxide and / or an adduct of BY series vegetable oleic acid ester and ethylene oxide; The HLB value of the BY series vegetable oleate and ethylene oxide adduct is 9-13; The nicotinimide insecticide ingredient is nitenpyram.

2. A method for preparing the agent for controlling agricultural aphids according to claim 1, characterized in that: include: The pyrethroid insecticide component, the nicotinimide insecticide component, the emulsifier and the non-protonic polar solvent are mixed to obtain the insecticide.

3. The method for preparing the agricultural aphid control agent according to claim 2, characterized in that: include: Add an emulsifier and a non-protonic polar solvent into a stirring kettle, then add the pyrethroid insecticide component and the nicotinimide insecticide component, and stir for 80-120 minutes to obtain the product.

4. The method for preparing the agricultural aphid control agent according to claim 3, characterized in that: include: Add an emulsifier and a non-protonic polar solvent into a stirring kettle, then add the pyrethroid insecticide component and the nicotinimide insecticide component, and stir for 80-100 minutes to obtain the product.

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