A kind of beta-cyhalothrin emulsion granule, its preparation method and its application

Abstract

The invention discloses a lambda-cyhalothrin emulsifiable granule and a preparation method and an application thereof, and relates to a pesticide containing pyrethroids, a preparation method and an application of the pesticide, and aims at providing the lambda-cyhalothrin emulsifiable granule which is small in environmental-friendly thrill, good in heat-storage stability and high in suspension rate, and a preparation method and an application of the lambda-cyhalothrin emulsifiable granule. The emulsifiable granule disclosed by the invention comprises lambda-cyhalothrin, an emulsifier, a solvent, white carbon black, a wetting agent, a dispersing agent and the like. The preparation method disclosed by the invention comprises the following steps: mixing the lambda-cyhalothrin, the emulsifier and the solvent; adsorbing with the white carbon black; adding the wetting agent, the dispersing agent and inert packing, mixing evenly, and crushing; and adding water with a binder, kneading evenly and pelletizing. The emulsifiable granule disclosed by the invention is immediately disintegrated and emulsified after being fed to water, is small in environmental-friendly thrill, good in ageing stability and heat-storage stability and high in suspension rate. The preparation method disclosed by the invention is simple and suitable for large-scale industrial production. The lambda-cyhalothrin emulsifiable granule is used for preventing and treating insect pests in crop plants.

Description

technical field [0001] The invention relates to an insecticide containing pyrethroids, its preparation method and its application. Background technique [0002] Lambda-cyhalothrin, the common name in English, is an insectoid insecticide and acaricide. The mechanism of action is to inhibit the conduction of insect nerve axons, and it has the functions of avoiding, knocking down and poisoning insects. effect. Rain resistant after spraying. Broad insecticidal spectrum, high activity, rapid efficacy. It has a good effect on various pests such as Lepidoptera, Coleoptera and Hemiptera and other pests, as well as spider mites, rust mites, gall mites, tarsal mites, etc. It can also treat insects and mites concurrently, and can control cotton red Bollworm and cotton bollworm, cabbage caterpillar, cabbage aphid, tea looper, tea caterpillar, tea orange gall mite, leaf gall mite, citrus leaf moth, orange aphid and citrus spider mite, rust mite, peach borer and pear borer, etc. It ca...

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Problems solved by technology

[0003] There are many types of formulations of lambda-cyhalothrin, including emulsifiable concentrate, water-emulsion, microemulsion, wettable powder, water-dispersible granule, microcapsule, etc. Due to the characteristics of lambda-cyhalothrin, it is generally made The content of the preparations is relatively low, and the solvent used to make emulsifiable concentrates is relatively large, which is more serious to environmental pollution; made into water emulsion and microemulsion, because some traditional solvents will also cause volatilization, which is very irritating to the user's skin; made into microcapsules The cost is relatively high; when made into wettable powder, the dust is relatively large; now it is better to make water-dispersible granules, which is both environmentally friendly and less irritating to users, but due to the relatively low melting point of lambda-cyhalothrin, causing After granulation, when heated or stored for a long time, part of the original drug will melt and aggregate, resulting in inability to disintegrate, low suspension rate, and loss of efficacy

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