青虫菌剂作为微生物农药,在防治农、林业害虫中日渐推广使用。但是,菌种经过多次培养传代后,生势会逐渐衰退,产生芽孢和晶体的能力减弱。为了提高杀虫性能和稳定生产,菌种(株)的选育工作是十分重要的。我们从已用菌种中自然选择优良菌株并以紫外光进行诱变,现把试验的初步情况总结如下: Coriolus as microbial pesticides, in the prevention and control of agricultural and forestry pests in the increasingly widespread use. However, after many times of culture, the vigor will gradually decline and the ability to produce spores and crystals will be weakened. In order to improve insecticidal performance and stable production, breeding of strain (strain) is very important. We have naturally selected from strains that have been used and mutagenic UV mutagenesis, the initial situation is summarized as follows: