本文报道不含有活菌的苏云金杆菌可湿性粉剂在田间应用的药效试验。结果表明:经过辐射处理杀灭活孢子后的苏云金杆菌对稻纵卷叶螟和小菜蛾有良好的防治效果,与未经过处理的Bt可湿性粉剂的效果相比不存在明显的差异。由于该种制剂不含有活菌,对生态环境无不良影响,在田间应用将更加安全。 This article reports the efficacy test of Bacillus thuringiensis wettable powder not containing live bacteria in the field. The results showed that the Bacillus thuringiensis bacilli treated with live spores after radiation treatment had a good control effect on C. medinalis and Plutella xylostella and there was no significant difference compared with the untreated Bt WP. As the preparation does not contain live bacteria, no adverse effects on the ecological environment, the application will be safer in the field.