天幕毛虫(Malacosoma neustria testacea Motsch)是我国北方的重要林业及果树害虫,以华北和东北地区发生严重。可为害苹果、梨、桃、李、杏和海棠等多种果树,以及杨、柳、榆、桑等阔叶林木。幼虫于早春食害嫩芽、叶片,严重时全树每个枝条的叶片全部吃光。 1985年6月初,在进行昆虫病原调查时,在内蒙古园艺科学研究所试验场采集到大 Malacosoma neustria testacea Motsch is an important forestry and fruit tree pest in the north of our country, with serious occurrence in North China and Northeast China. May damage apple, pear, peach, plum, apricot and Begonia and other fruit trees, as well as poplar, willow, elm, mulberry and other broad-leaved trees. Larva eaten in early spring buds, leaves, all the branches of the tree full of leaves all eat. Early June 1985, during the investigation of insect pathogens, horticultural research institute in Inner Mongolia Institute collected large