柿毛虫Lymantria dispar L.又名午毒蛾,是北京地区主要林果害虫之一,危害柿、杏、山楂以及杨树等,其中以柿树受害最重.据调查,1979—1980年房山县周口店公社柿毛虫大发生造成连年减产.该公社最高年产柿子657吨(1970年),而1981年只有194.5吨,1982年降为135.6吨.另据房山县矿区班各庄公社的调查,近几年来由于柿毛虫的为害柿子产量减少三分之一以上.1983年延庆县大庄科公社此虫 Persimmon Lymantria dispar L., also known as hyphorn moth, is one of the major fruit pests in Beijing, endangering persimmon, apricot, hawthorn and poplar, among which persimmons suffer the most.According to the survey, 1979-1980 Zhoukoudian Commune persimmon caterpillar caused a series of annual output reduction of the commune with the highest annual output of persimmon 657 tons (1970), while only 194.5 tons in 1981, dropped to 135.6 tons in 1982. According to Fangshan County Mining Village commune survey, recently Years due to persimmon damage persimmons production reduced by more than one third. 1983 Yanqing Dazhuang Branch commune this pest