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林业部林政保护司为摸索大面积综合防治松毛虫的途径和方法,1981年与浙江、安徽、辽宁签定了《综合防治松毛虫协议》。辽宁试·点设在松毛虫危害较重的建平县。据1981年调查,受灾面积达50多万亩,虫口密度一般100—300头/株,多者达1,000多头/株,大片松林被食光,少数松树枯黄致死。试点以综合防治理论和综合治理的指导思
In order to explore the ways and methods of large-scale and comprehensive prevention and control of pine caterpillars, the Forestry Protection Department of the Ministry of Forestry signed an agreement on comprehensive prevention and control of pine caterpillars with Zhejiang, Anhui and Liaoning in 1981. Liaoning trial point set in the detritus more seriously Jianping County. According to the survey in 1981, the affected area was over 500,000 mu, the population density was 100-300 heads per plant, more than 1,000 heads per plant, and the large pine forests were eaten and a few pine trees were yellowish. Pilot to comprehensive prevention theory and comprehensive management of the guiding ideology