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由秦皇岛市林业局、青龙县林业局共同完成的“赤松毛虫预测预报因子研究”项目,于1986年11月26日通过了市级鉴定。 赤松毛虫是河北省成灾最严重的森林害虫,多年来常因没有测报方法不能掌握虫情动态而使防治工作处于被动。为此,秦皇岛市和青龙县林业局于1984—1986年,对赤松毛虫预测预报有关因子进行了观察研究。找出了防治
The project “Research on Prediction Factors of Dendrolimus punctatus” jointly completed by Qinhuangdao Forestry Bureau and Qinglong County Forestry Bureau passed the municipal appraisal on November 26, 1986. Dendrolimus caterpillars is the most devastating forest pest in Hebei Province. For many years, its prevention and control work has been passive due to its inability to grasp the dynamics of insects over the years. To this end, Qinhuangdao City and Qinglong County Bureau of Forestry in 1984-1986, the Predictors of Dendrolimus punctatus predict the relevant factors were observed and studied. Identify the prevention and treatment