角斑古毒蛾[Orgyia gonostigma(Linnaeus)]为杂食性食叶害虫.据报道,幼虫除为害柳、杨、桦、栎、榛、蔷薇等林木外,对梨、苹果、李、梅、樱桃、山楂果树均能为害.据记载,国内分布于黑龙江、吉林、辽宁、河北、河南,国外分布于朝鲜、日本、苏联、欧洲.此虫在东北一年发生一代,据我们初步观察,在南京一年发生三代.10月中下旬以幼虫下树,在隐蔽场所越冬,翌年4月中旬开始取食为害.1983年4月中旬在本所的泡桐、悬铃木、柳树上及室内饲养的幼虫,同时都发现患病死虫,自然患病率达83.3%以上.病虫尸体经分离后电镜观察,引起角斑古毒蛾幼虫大量死亡的主要病原体是核多角体病毒,这种病毒国内未见有报道,是首次发现.现将初步观察结果报道于下: Orgyia gonostigma (Linnaeus)] is a omnivorous leaf-eating pest, and it has been reported that the larvae are not only harmful to pear, apple, plum, plum, cherry, According to records, the domestic distribution in Heilongjiang, Jilin, Liaoning, Hebei, Henan, abroad distributed in North Korea, Japan, the Soviet Union, Europe this worm occurred in the northeast a year, according to our preliminary observation, in Nanjing one In three generations in late October to larvae under the tree, in the winter over the shelter, the beginning of the mid-April the next year feeding damage.In mid-April 1983 in the firm Paulownia, Platanus, willow and indoor feeding larvae, both Found that the prevalence of dead insects, the natural prevalence rate of 83.3% or more.Electron microscope observation of isolated and post-mortem body, causing a large number of deaths Kok poison moth larvae major nuclear polyhedrosis virus, the virus has not been reported in the country, Is the first discovery. Now the preliminary observations reported below: