我们遵照伟大领袖毛主席“同病虫害作斗争”的教导,为了进一步摸索利用自僵菌防治松毛虫的规律,从1973年春季起,采用培养基加链霉素及扩大接种量的办法,从松毛虫僵尸上一次分离成功的纯壮菌种达83％,菌种好,生产的菌粉质量高,在浏阳、茶陵、湘潭等县用于防治越冬代松毛虫8千多亩,杀虫率均在80％左右。1975年春季在浏阳县、沙市公社搞的放菌样板,放到那里,那里的松毛虫就死一片。实践证明,应用白僵菌防治松毛虫, In accordance with the teachings of Chairman Mao, the Great Leader, “Combating Pests and Diseases”, in order to further explore the use of autotrophic bacteria to prevent and control pine caterpillars, starting from the spring of 1973, using medium supplemented with streptomycin and expanding inoculation, Caterpillar zhuang successful separation of pure strains of 83%, good bacteria, the production of high quality powder, in Liuyang, Chaling, Xiangtan and other counties for the protection of overwintering Dendrolimus 8 acres, insecticidal rate Are about 80%. The spring of 1975 in Liuyang County, Sha communes engage in the model of the bacteria, put there, where the pine caterpillars died. Practice has proved that application Beauveria bassiana control pine caterpillars,