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川楝素是从川楝树分离得到的一种四环三萜类化合物。它对菜青虫有较强的拒食及毒杀作用,因此施药后能很快地得到保护叶片的效果,且在田间也有较长的残效期。经试验,川楝素对天敌凤蝶金小蜂及蚜茧蜂安全。
Toosendanin is a tetracyclic triterpenoid isolated from neem tree. It has strong antifeedant and poisonous killing effect on Pieris rapae, so the effect of protecting leaves can be quickly obtained after application, and there is a longer residual period in the field. After testing, toosendanin on the natural enemies Papilionidae and aphid Braconid safety.