白僵菌防治松毛虫研究以及二十二年来在省内66个县撒放900t白僵菌粉,防治142万余亩松林松毛虫,实践证明应用白僵菌防治马尾松毛虫不会影响养蚕业,不会增加家蚕的僵病数量,这主要是由于防治松毛虫用的是松毛虫白僵菌,它对家蚕致病力低,对松毛虫致病力高,菌株不同;放菌治虫后,白僵菌数量很快消退到原来自然界的水平;松毛虫白僵菌在自然界的数量达不到使家蚕致病的数量。白僵菌的生产解决了三大技术难点:产品干燥技术,机械分离白僵菌孢子技术和高孢粉生产技术。解决了白僵菌的生产问题。明确了使用方法:纱布袋撒粉、机械喷粉和飞机喷洒;确定了放菌量,常规菌粉0.5～1.0kg/亩,高孢粉1.0～10.0g/亩;明确了放菌时间,每年10～11月份,3～4月份防治越冬代松毛虫;浙南、浙东南、沿海县市是我省最适合应用白僵菌防治松毛虫的地区,白僵菌的防治效果在70%以上。解决了白僵菌的使用问题。全省已广泛应用白僵菌防治松毛虫,有些地区白僵菌防治面积占总防治面积的1/3,已成为我省防治松毛虫的主要手段。应用白僵菌防治松毛虫挽回损失折合人民币3184.09方元,有显著的经济效益。 Beauveria bassiana prevention and control of pine caterpillars and twenty-two years in 66 counties in the province placed 900t Beauveria bassiana powder, prevention and control of more than 1.42 million mu of pine forest caterpillar, practice proved Beauveria bassiana control of dendrolimus will not affect sericulture Industry, will not increase the number of stiff silkworm, which is mainly due to the prevention and treatment of pine caterpillar Beauveria bassiana, which has low pathogenicity to silkworm, high virulence of Dendrolimus, strains different; , Beauveria bassiana quickly subsided to the original level of the natural world; Beauveria bassiana Beauveria bassiana in the number of less than the number of pathogenic Bombyx mori. Beauveria bassiana production to solve the three major technical difficulties: product drying technology, mechanical separation Beauveria bassiana spore technology and high spore production technology. Solve the production of Beauveria bassiana. Clear the use of methods: gauze bag dusting, mechanical dusting and aircraft spraying; to determine the amount of bacteria, the conventional bacteria powder 0.5 ~ 1.0kg / mu, high spore powder 1.0 ~ 10.0g / mu; From October to November, from March to April, we control the overwintering generation of pine caterpillars. In southern Zhejiang, southeast of Zhejiang and coastal counties, the most suitable area for application of Beauveria bassiana in our province is prevention and control of Beauveria bassiana. The control effect of Beauveria bassiana is more than 70%. Beauveria solve the use of the problem. Beauveria bassiana has been widely used in the province of prevention and control of pine caterpillars, Beauveria control area in some areas accounted for 1/3 of the total control area, has become the main means of prevention and control of pine caterpillars in our province. Beauveria bassiana control of pine caterpillars loss recovery equivalent to 3184.09 yuan, significant economic benefits.