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松毛虫在保山、施旬两县发生已有十几年的历史。1964年及1967年两次大发生给当地森林资源造成损失。为了有效地控制松毛虫灾害,保护现有森林资源,1974年10—12月我们分别在保山县汉庄公社,施甸县仁和公社、城郊公社、银川公社、保场公社等地作了调查。根据虫口密度的调查情况,用白僵菌作了大面积防治,随此开展了一些小型防治试验。据调查,保山县汉庄公社受害面积在3000亩以上,单株虫口密度为4—60条。
Dendrolimus in Baoshan, Shi Xun two counties have occurred more than 10 years of history. Two major incidents in 1964 and 1967 caused losses to local forest resources. In order to effectively control the pine caterpillar disaster and protect the existing forest resources, we conducted a survey in Hanzhong commune, Shidian County Renhe commune, suburban commune, Yinchuan commune, Bao commune commune and other places in Baoshan from October to December, 1974 respectively. According to the survey of population density, Beauveria bassiana was used for large-scale prevention and treatment, with which some small-scale prevention and control tests were carried out. According to the survey, Baoshan Hanzhong commune affected area of 3,000 mu or more, single insect population density of 4-60.