舞毒蛾主要危害杨树、苹果、梨、杏、李、山楂、柿等500余种植物。幼虫食叶,亦啃食果皮,大发生时常将叶片吃光。1997年在三河市燕郊镇、李旗庄镇、齐心庄镇、杨庄镇等10个镇舞毒蛾大面积发生,主要危害村庄内的四旁树、农田防护林,树种为杨树。严重者杨树叶全被吃光。1998年在三河市只有一小部分村庄发生,并很快得到控制。通过这两年对舞毒蛾的观察、防治,总结出一套防治方法。舞毒蛾一年发生一代,以卵块在树体上、石块、屋檐、房后等处越冬。杨树发芽时开始孵化,初龄幼虫白天多群栖,夜间取食叶片。2龄后分散取食,白天栖息在树叉、皮缝、房前屋后或树下土石缝中,傍晚成群上树取食至天亮时又爬回树下隐藏。幼虫期50-60天,6月下旬(麦收以后)开始陆续老熟,爬到白天隐蔽场所结薄茧化蛹(多在树干或屋檐处化蛹)。7月成虫大量羽化,成虫有趋光性,常在化蛹处附近产卵,在树上多产于枝干的 Gypsy moths mainly endanger the poplar, apple, pear, apricot, plum, hawthorn, persimmon and other 500 kinds of plants. Larvae eat leaves, but also eating grapes, often occur when the leaves eaten. In 1997, Yanhejiao Town, Liqizhuang Town, Qixinzhuang Town and Yangzhuang Town, Sanhe City, occurred in a large area of ​​10 gypsy moths, which mainly endangered the four-way tree and farmland shelterbelts in the village and poplar trees. In severe cases, all the leaves are eaten. In 1998 only a small number of villages in Sanhe City took place and were quickly brought under control. Through the past two years of gypsy moth observation, prevention and treatment, summed up a set of prevention and treatment methods. Gypsy moth occurs a generation a year, with egg blocks in the trees, stones, eaves, room and other places overwintering. Poplar began to hatch when germinated, the first instar larvae during the day more than habitat, feeding leaves at night. 2 years after dispersal feeding, daytime habitat in the tree fork, leather stitching, in front of the house or under the tree soil cracks, the evening group feeding on trees until dawn and climbed back to hide under the tree. Larvae of 50-60 days, late June (after the wheat harvest) began to gradually mature, climbing to the hidden place during the day cocoon pupation (mostly in the trunk or eclipse pupation). In July a large number of adult emergence, adult phototaxis, often in the vicinity of pupation spawning, prolific in the tree branches