近一、二年来,有关单位用青虫菌六号液剂防治松毛虫,其面积已有几十万亩,防治效果是令人鼓舞的。但是,从有关材料和现场观察,青虫菌六号液剂对松毛虫击倒率之高,违背了到目前为止已研究的苏云金杆菌致病机理,引起了同行及森保工作者的广泛注意。为此,我们用该液剂进行了室内毒力试验,现就初步试验结果与有关同行商榷。 In the past year and two years, the relevant units used the liquid of Helicoverpa liquid on the prevention and control of pine caterpillars, and the area has been several hundred thousand mu. The control effect is encouraging. However, judging from the relevant materials and on-site observations, the high rate of caterpillar fungus attack on Dendrolimus punctatus violates the pathogenic mechanism of Bacillus thuringiensis that has been studied so far, attracting the attention of colleagues and forest health workers. To this end, we used the liquid agent for indoor toxicity test, the preliminary test results are now open to discussion with the relevant counterparts.