Hygienic insecticidal suspoemulsion and preparation method thereof

Abstract

The invention relates to hygienic insecticidal suspoemulsion. The suspoemulsion comprises the following components calculated in percentage by weight: 0.1 to 10% of an active component A, 0.5 to 40% of a solvent, 1.0 to 10% of an emulsifying dispersant, 1 to 30% of an active component B, 1.0 to 10% of a wetting dispersant, 0.2 to 5% of an emulsifying stabilizer, 0.05 to 10% of a thickener, 1.0 to 10% of an antifreeze agent, 0.1 to 1.0% of a defoamer, 0.1 to 1.0% of a preservative, 0.1 to 5.0% of an acid-base regulator, and the balance of water; the active component A is knockout pyrethroid; the active component B is fatal pyrethroid; the emulsifying stabilizer is a ultra-high molecular weight copolymer of which the relative molecular weight is 1 to 20 million; in the suspoemulsion, the emulsifying dispersant and the wetting dispersant are optimized, especially the special emulsifying stabilizer is supplemented to solve the stability problem existing in a suspoemulsion system.

Description

technical field [0001] The invention relates to the field of hygienic insecticides, in particular to a hygienic insecticide composition containing pyrethroids and its application. Background technique [0002] Pyrethroid pesticides are a class of insecticides artificially synthesized by simulating natural pyrethrins. Due to their advantages such as broad insecticidal spectrum, good effect, low residue, and no accumulation effect, their application has become more and more common in the past 30 years. In addition to preventing and controlling agricultural pests, it has achieved quite satisfactory killing effects in controlling pests such as vegetable and fruit tree pests, public health mosquitoes, flies, cockroaches, and head lice. [0003] For a long time, the formulations for preparing pyrethroid active ingredients into hygienic insecticides are relatively simple, mainly including emulsifiable concentrates, emulsions in water, microemulsions, etc. Agents, etc.; the former ...

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Problems solved by technology

[0003] For a long time, the formulations for preparing pyrethroid active ingredients into hygienic insecticides are relatively simple, mainly including emulsifiable concentrates, emulsions in water, microemulsions, etc. Agents, etc.; the former is an emulsion, although the quick-killing effect is better, but the retention activity is poor because it is easily absorbed by the contact surface. Good retention activity, but because it does not contain organic solvents, the contact killing effect on pests is slow, and the quick killing effect is not ideal

[0004] It is well known in the industry that pyrethroids are divided into knockdown agents and lethal agents. The knockdown agents can exert excellent rapid knockdown effects at low concentrations, but the lethal effect is poor, and the lethal agents have high lethal activity. , but at the same content, it has a poorer rapid knock-down effect than the knock-down agent; but generally speaking, the compatibility of the liquid preparation in the form of emulsion and suspension is not good. During the research, we found that by adding A small amount of specific knock-down agent is formulated into a specific compound of a large amount of specific suspension form lethal agent in the form of emulsion, on the one hand, the rapid knock-down effect of the knock-down agent can be fully exerted in the emulsion, and the suspension form can be used again on the other hand. Give full play to the long-term retention lethal effect

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