植物性农药具有广泛的杀虫、拒食、忌避阻止产卵、不育、杀线虫和螨类以及生物调节等多种功效，既可以用于精制提栋有较强生物活性物质以合成商品农药，又可以就地取材，土法上马，不但操作简便，而且可大大降低病虫害防治成本，可缓解农村经济上的紧张和农药的供求矛盾。因此 Botanical pesticides have a wide range of insecticidal, antifeedant, avoid repellent to prevent spawning, infertility, nematodes and mites and biological regulation and other effects, both can be used for refining tiger strong bioactive substances to synthetic commercial pesticides, It can be drawn on the spot and launched by indigenous methods. It is not only easy to operate, but also can greatly reduce the cost of pest and disease control and alleviate the contradiction between the rural economic tension and the supply and demand of pesticides. therefore