雪毒蛾(Stilpnotia salicis(Linnaeus))是危害人工林、农田防护林和街道杨树的主要害虫之一。近几年来在锡盟南部地区的太仆寺旗、多伦县、正兰旗和正镶白旗等地都大量发生过,被雪毒蛾危害后的树木严重枯黄,甚至有的单株死亡和成片枯死。一九七九年正镶白旗星耀公社前造林湾大队2,700亩人工林杨树(包括480亩防风林)大面积发生了这种害虫,危害严重的达700余亩,其中树叶被吃光的达200余亩,每株树上雪毒蛾幼虫平均在50—150头左 Stilpnotia salicis (Linnaeus) is one of the major pests that endanger plantations, farmland shelterbelts and street poplars. In recent years, the Taipusi Banner, the Duolun County, the Zhenglan Banner and the Zhengbai Banner in the southern part of the Ximeng League have occurred in large numbers. The trees damaged by the snow moths are seriously yellowish, and some even die and die. In 1979, a total area of ​​2,700 mu of plantation poplar (including 480 mu of windbreak forest) was destroyed in a large area by the Yehliuwan Brigade in front of Yehuan commune. 200 acres, each plant on the snow moth larvae average 50-150 left