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一、引言 舞毒蛾NPV病在东北地区曾多次发生。如1976年辽宁省盖县、庄河、海城等地曾发生过NPV病的流行,1976年黑龙江省镜泊湖地区,由于舞毒蛾NPV病的大流行使幼虫死亡率达90％以上(于德生等1981);1981年斗沟子林场在一株山杨上舞毒蛾幼虫由NPV病死亡达78％,同年迎春林业局、鸡西桦木林子林场和大东沟林场都有NPV病的自然流行;1980年东北林学院帽儿山林场老爷岭舞毒蛾大发生,其危害面积达1100公顷,由
I. Introduction Gypsy moth NPV disease occurred repeatedly in the northeast region. For example, in 1976, the epidemic of NPV had occurred in Gai County, Zhuanghe and Haicheng of Liaoning Province. In 1976, the death rate of larvae in the Jingpo Lake area of Heilongjiang Province was over 90% due to the pandemic of Gypsy NPV Germany 1981, etc.). In 1981, the death rate of Gypsy moth larvae in a dodecandom in Populus davidiana was 78%. In the same year, Yingchun Forestry Bureau, Birchwood Forest Farm and Dadonggou Forest Farm all had the natural epidemic of NPV. 1980 Northeast Forest College hat Hill Hill Laoyeling gypsy moth occurred, the damage area of 1100 hectares, by