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赤松毛虫是松林的主要害虫之一。我县历年发生松毛虫二十万亩左右,占全县松林面积的百分之五十。对松毛虫的防治,历来用广谱性杀虫剂,虽然杀虫效果均在80—90％以上。但由于长期使用,不仅松毛虫的抗药性越来越强,而且严重的污染环境,杀伤了大量的天敌,破坏了森林生态平衡。为了解决这个矛盾,1985年春,我们与北京林学院在岩子口、东新寨、西郁沟三个村6800亩松山上搞了灭幼脲防治松毛虫的试验,现初报如下:
Red pine caterpillar is one of the major pests in the pine forest. My county over the years occurred about 200,000 mu of pine caterpillars, accounting for 50% of the entire area pinewood. The control of pine caterpillars, has always been using broad-spectrum insecticides, although insecticidal effects are more than 80-90%. However, due to long-term use, not only the resistance of pine caterpillars is getting stronger, but also serious environmental pollution, killing a large number of natural enemies, undermining the ecological balance of the forest. In order to solve this contradiction, in the spring of 1985, with the Beijing Forestry College, we conducted experiments on the prevention and control of pine dementia on 6800 mu of Songshan Mountain in the villages of Yanzikou, Dongxinzhai and Xiyuogou,