舞毒蛾(Lymantria dispar L.)俗称柿毛虫,在柿产区普遍发生为害,严重影响柿树生长和产量.河北省易县杨谷庄公社有4个大队以产柿为主,共有柿树24000株,其中结果树约占三分之二.过去丰年可产柿果90余万斤,常年产量也在55万斤左右.但是自1974年以后,由于舞毒蛾的发生和为害日益严重,导致柿树大量减产,1979年柿果产量 Gypsy moth (Lymantria dispar L.) commonly known as persimmon, persimmon area in the common occurrence of harm, seriously affecting the growth and yield of persimmon .Yebei CountyYang Gu Zhuang commune has four brigades to produce persimmon, a total of 24000 persimmon trees, Which accounted for about two-thirds of the tree.In the past year can produce Persimmon more than 90 kilograms, perennial production is about 550000 pounds.But since 1974, due to the occurrence and damage Gypsy moths increasingly serious, resulting in a large number of persimmon Cut production, persimmon production in 1979