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根据生产绿色食品的要求 ,对危害银杏的黄刺蛾必须用综合防治方法防治 ,并尽可能用农业和生物防治 ,在必要时应用高效、低毒、低残留的农药防治。具体方法 :在 11月至翌年 4月铲除越冬茧 ,在幼虫分散前摘除虫叶 ;化学防治用 90 %晶体敌百虫、80 %敌敌畏、50 %马拉硫磷或 50 %杀螟松 150 0倍液喷雾 ;生物防治用每克含孢子 10 0亿青虫菌粉稀释 10 0 0倍液喷雾
According to the requirements of the production of green food, the yellow thorn moth that endangers ginkgo must be prevented and controlled by comprehensive prevention and cure methods. Where possible, agriculture and biological control should be used. Where necessary, high-efficiency, low-toxicity and low-residue pesticide should be used for prevention and control. Specific methods: Eradication of overwintering cocoon from November to April of the following year, removal of insect leaf before dispersal of larvae; chemical control with 90% crystalline trichlorfon, 80% dichlorvos, 50% malathion or 50% fenitrothion 150 Times liquid spray; biological control with 10 g per spore 10 g wormwort powder diluted 10 0 times spray