十三、以“毒”攻“毒”用能够抑制病害和害虫的生物因子制成药剂防治病虫害的方法为以“毒”攻“毒”法穴植保工作者称其为生物防治雪。此法不仅能抑制病虫对蔬菜的危害,而且不污染环境因此是生产绿色食品蔬菜的好方法。当前经工厂生产制成的生物制剂除前节“信息杀虫”讲过的 Thirteen, to “poison” attack “poison” with biological factors that can inhibit diseases and pests made of pesticides to control pests and diseases as a “poisonous” attack “poisonous” method point plant protection workers call it biological control of snow. This method can not only inhibit pests and diseases of vegetables, but also does not pollute the environment so it is a good way to produce green food and vegetables. Currently produced by the factory biological preparations in addition to the previous section “information insecticide” talked about