苦楝种核乙醇抽提物是一种植物质杀虫剂,它含有对害虫有拒食作用的拒食剂。经测定拒食剂基本上是蛋白质,糖,有机酸三萜类物质及其衍生物,根据其抗虫机理可分为抗生型、抑制型及嗅觉型三类。实验室已证明楝树的提取物对人和动物是完全无害的,对害虫不易产生抗药性,对益虫一般安全且有选择性,不同种的昆虫对楝科植物有效成份反应有很大的差异。 Neem ethanol extract is a phytochemical insecticide that contains antifeedants that are resistant to pests. Antifeedant was determined to be basically protein, sugar, organic acid triterpenoids and their derivatives, according to its insect resistance mechanism can be divided into antibiotic, inhibitory and olfactory type three. The laboratory has proved that the extract of Neem is completely harmless to humans and animals, insects are not easy to produce resistance, beneficial insects are generally safe and selective, different species of insects of Meliaceae plant active ingredients have a great reaction difference.