A composite insecticide, its preparation method and application

By combining imidacloprid and thiamethoxam with chitosan, sodium alginate, disodium EDTA and tea saponin, a compound insecticide was prepared, which solved the problem of multiple applications in the existing technology and achieved efficient pest control and increased yield during the growth cycle of Chinese cabbage.

CN122397750APending Publication Date: 2026-07-17HENAN HANSI CROP PROTECTION
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HENAN HANSI CROP PROTECTION
Filing Date
2026-06-10
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing pesticides require multiple applications in the cultivation of Chinese cabbage and bok choy, which increases the planting burden or causes pesticide residues that affect crop growth, making it impossible to achieve both pest control and yield increase.

Method used

A compound insecticide was prepared by combining imidacloprid and thiamethoxam, and then encapsulating imidacloprid with chitosan to form sustained-release microcapsules. The electrostatic repulsion of sodium alginate and the blocking of the chelation effect of thiamethoxam were combined with the addition of tea saponin to accelerate the metabolism of thiamethoxam.

Benefits of technology

This method allows for only two pesticide applications throughout the entire growth cycle of Chinese cabbage, achieving both excellent pest control and yield increase while avoiding pesticide residues that could negatively impact crop growth.

✦ Generated by Eureka AI based on patent content.

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Abstract

本发明提供了一种复合杀虫剂及其制备方法和应用，属于杀虫剂技术领域，该制备方法：S1、向吡虫啉二氯甲烷油相中，加入壳聚糖醋酸水相，超声乳化，蒸发，得到壳聚糖包覆吡虫啉；S2、将壳聚糖包覆吡虫啉加入海藻酸钠溶液，滴加氯化钙溶液‌，交联反应后，0.1M柠檬酸钠洗涤，冷冻干燥，得到吡虫啉包覆粉末；S3、向吡虫啉包覆粉末中依次加入乙二胺四乙酸二钠、噻虫嗪、茶皂素，混匀，即得复合杀虫剂，按质量百分比计：吡虫啉包覆粉末59.7‑64.5%、乙二胺四乙酸二钠0.2%‑0.3%、噻虫嗪35‑40%和茶皂素0.1‑0.2%。本发明将吡虫啉和噻虫嗪联用，确保大白菜整个生长周期内只需施药2次，即可兼顾达到优异的虫害（蚜虫）防治效果和增产效果。
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