随着全国生物防治工作的广泛而深入地开展,白僵菌在农林业生产实践中已用于防治多种害虫,但在防治杨干象等杨树枝干害虫方面,还缺乏经验。而在自然情况下,发现杨干象虫和蝙蝠蛾幼虫,都有白僵菌寄生,只是寄生率不高。为探讨利用自僵菌防治这两种害虫的途径,我们自1976年以来,在过去工作的基 Beauveria bassiana has been used to prevent and control many kinds of pests in the practice of agriculture and forestry production with the extensive and in-depth national biological control. However, Beauveria bassiana still lacks experience in the prevention and cure of dry trunk pests of poplar such as Yang Gan. In natural conditions, it was found that B. elegans and bat moth larvae had parasitism of Beauveria bassiana, but the parasitism rate was not high. To explore the ways to harness these two pests for the use of autotrophic bacteria, we have been working in the past since 1976