高大树木受到美国白蛾危害,防治困难,2015年9月选用了林间释放“敌敌畏”烟剂防治美国白蛾方法,试验表明,林地郁闭度在0.7以上,傍晚微风情况下防治,虫口减退度率可达80%以上,是一种有效的防治方法。 The tall trees were endangered by the American white moth and had difficulty in controlling. In September 2015, the method of forest release “dichlorvos” was used to control American white moth. The test shows that the forest canopy density is above 0.7, Insect population decline rate of up to 80% or more, is an effective control methods.