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我县发生油松毛虫已十几年了,有些年份灾情还相当严重。为了落实毛主席“保护森林,并有计划地发展林业”的伟大指示,尽快地控制住松毛虫灾害,近几年来,我们大力开展了松毛虫的生物防治工作。自1973年起,我们连续四年用自己(两间房林场)土法生产的白僵菌除治松毛虫,结果说明,以喷粉方式用白僵菌除治老龄油松毛虫是一种很好的措施。每年6月底至7月中旬,雨量集中,气温高,日平均温度在20℃左右,
Pine caterpillars have occurred in my county more than 10 years, some years the disaster is still quite serious. In order to implement Chairman Mao’s great guideline of “Protecting the forest and developing forestry in a planned way”, and controlling the pine caterpillar disasters as soon as possible, in recent years, we have vigorously carried out the biological control of pine caterpillars. Since 1973, we have been using Beauveria bassiana produced by our own (two houses) for removal of pine caterpillars for four consecutive years. The results show that the application of Beauveria bassiana by dusting is a very effective method Good measure From the end of June to the middle of July each year, the rainfall is concentrated, the temperature is high, the average daily temperature is about 20 ℃,