Some dead insects invaded by Beauveria had been collected from different areas and 15 isolates were separated and extracted.

• 对不同地方采集到的被白僵菌侵染死亡的昆虫分离、纯化,以桃蚜、麦长管蚜和禾谷缢管蚜为供试昆虫进行毒力测定。