马尾松毛虫是玉林市的主要森林害虫，分布广，世代多（一年四代），繁殖快，世代重叠，危害严重，防治困难。七八十年代，玉林市主要使用“六六六”、滴滴涕、敌敌畏、灭虫净等常规杀虫剂防治重灾松毛虫。这类农药使用剂量大，易杀伤天敌昆虫，有残留污染，对入、畜、动植物构 Masson pine caterpillars are the main forest pests in Yulin City. They are widely distributed and have many generations (one year and four generations). They multiply quickly and multiply from generation to generation with serious harm and prevention and treatment difficulties. In the seventies and eighties, Yulin City mainly used “BHC”, DDT, dichlorvos, pest control and other conventional pesticides to prevent and treat caterpillar. Such pesticides use large doses, easy to kill natural enemies of insects, residual contamination, into the livestock, animals and plants