松毛虫是河北省的主要森林害虫。据1971年统计,全省发生面积达130多万亩,仅青龙、抚宁两县因受害而死亡的松林就达37000余亩。为此,我们遵照毛主席关于“备战、备荒、为人民”和“不但要造林,而且要护林” 的教导,把防治松毛虫作为我省防治林木病虫害的重点课题,组成了五人小组,到松林资源大、松毛虫危害严重的青龙县进行防治松毛虫的科学研究工作。 Dendrolimus is a major forest pest in Hebei Province. According to statistics in 1971, the province had an area of ​​more than 1.3 million mu, with only 37,000 acres of pine forests dead in Qinglong and Funing counties. To this end, in accordance with Chairman Mao’s teachings on “preparing for war, preparing for famine, for the people,” and “not only afforesting but also protecting the forests,” we have organized the prevention and control of pine caterpillars as a key issue for preventing and controlling forest pests and diseases in our province. Pine forest resources, the serious damage of pine caterpillars Qinglong County for the prevention and control of pine caterpillars scientific research.