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河北省青龙县地处塞北,长城边陲,森林资源比较丰富。近年来,由于松毛虫发生面积大,蔓延迅速,危害猖獗,防治松毛虫成为林业生产上迫切需要解决的重要问题。 1977年农林部林业局组织华北农大、北京农药一厂、怀柔农机厂、青龙县林业局及森林病虫害防治站共同组成林业地面超低容量喷雾技术试验组,于5月9—15日在青龙县大丈子
Qinglong County, Hebei Province is located in Saibei, the Great Wall margin of the border, rich forest resources. In recent years, due to large area of pine caterpillars, spread rapidly, rampant harm, prevention and control of pine caterpillars become an urgent need to solve the important issue of forestry production. In 1977, the Forestry Bureau of the Ministry of Agriculture and Forestry organized the North China Agricultural University, Peking First Pesticide Factory, Huairou Agricultural Machinery Factory, Qinglong County Forestry Bureau and Forest Disease and Pest Control Station to jointly form the experimental group of super-low capacity spray technology forestry ground test. On May 9-15, Big man