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油松毛虫是北京西山油松林的主要害虫,1980年局部林区松针曾被吃光,采用地面防治效果不佳。为寻求经济有效的防治方法,1980-1982年我们采用塑料薄膜树干围环法,防止越冬幼虫上树取食,将其困死于树下,试验和应用面积共9,082亩,取得了95％以上的防治效果。试验与大面积应用表明,采用此法防治,方法简便易行、成本低、效果好,不杀伤天敌、不污染环境、对人畜安全、围环一次可保持防效2-3年。现将试验与应用情况简介如下:
Dendrolimus tabulaeformis is the main pest of Pinus tabulaeformis in Beijing Xishan Mountain. In 1980, some pine needles in local forest were eaten, and the ground control effect was not good. In order to find a cost-effective method of prevention and treatment, from 1980 to 1982, we adopted a plastic film trunk truncation method to prevent overwintering larvae from feeding on the trees and stranded under trees. The total area of 9,082 mu of land for testing and application was over 95% The prevention and treatment effect. Experiments and large area applications show that using this method to prevent and control, the method is simple and easy, low cost, good effect, does not kill natural enemies, does not pollute the environment, human and animal safety, the ring can maintain a control effect 2-3 years. Now test and application of the situation are as follows: