松毛虫是我国主要的森林害虫,发生历史长,分布范围广,对松林的危害十分严重。过去虽连年作为重点进行防治,因对虫情掌握不准,技术方法不当,始终未能控制灾情的发生和发展。为了摸索大面积控制虫灾的经验和办法,改变“年年治虫、年年有灾”的被动局面,在财政部的支持下,林业部于1981年至 Dendrolimus is a major forest pest in our country. It has a long history and a wide distribution. It is very harmful to pine forest. Although the past years as the focus of prevention and control, because insects do not grasp the control, improper technical methods, has failed to control the occurrence and development of the disaster. In order to explore a large area of ​​experience and methods of pest control and change the “pest control year after year, disaster every year,” the passive situation, with the support of the Ministry of Finance, the Ministry of Forestry in 1981 to