杨毒蛾属鳞翅目毒蛾科,是为害杨树叶部主要害虫之一。我区坝上四县普遍发生,危害十分严重,致使树势衰弱,生长量受到影响,有的竟处于枯黄濒死状态。1978年6月和1979年7月初,在坝上康保、沽源,先后发现杨尺蠖、杨毒蛾幼虫大量自然死亡现象。幼虫标本经中国科学院动物研究所鉴定,为杨毒蛾核型多角体病毒,属杆状病毒科、杆状病毒属。此病毒国内未见记载,属首次发现。 Yang poison moth is Lepidoptera moths, is one of the main pests damage poplar leaves. The four counties on the dam in our district are common and the damage is very serious. As a result, the shrubs are weak and their growth is affected. Some of them are in a dying condition. In June 1978 and early July 1979, we found a large number of natural deaths of the larvae of Populus trichocarpa on the Bashang Kangbao and Guyuan. Larva specimens identified by the Institute of Zoology, Chinese Academy of Sciences, for the genus pyrethroid nuclear polyhedrosis virus, a baculovirus family, baculovirus. This virus is not recorded in the country, is the first time found.