几年来我场多次发生松毛虫害,严重影响松树的生长,1965～1967年曾三次用飞机进行防治,但仍不能解决问题。最近使用白僵菌防治取得很好的效果。今年三月初,我们对虫情进行了调查和分析研究,认为必须要抓紧对越冬代松 In recent years, many pine tree pests occurred in my field, seriously affecting the growth of pine trees. From 1965 to 1967, the plane was used for three times to prevent and cure the disease, but it still can not solve the problem. Beauveria recently used to achieve good results. In early March this year, we carried out a survey and analysis of insects that we must pay close attention to the overwintering pine