关键词: 德国小蠊, 绿僵菌, 僵虫病, 组织病理

Abstract: Objective The histopathology of Blattella germanica after infection with Metarhizium anisopliae was studied. Methods The CP embedding tissue section technique was used. Results The results showed that the insects were clumsy after we put the conidia of M.anisopliae on the terga for 2-3 day ,and the appresoria and infection peg were formed approximately 4 day later. The cockroaches died of muscardine after 4-5 day and hyphae were full of the bodies,and the vacuole were found in their muscular tissues at the same time. The hyphae grown out of their internodal membrane 10 day later,and the muscardine cadaver with sori of conidia were formed 12 day later. Conclusion SH is an effective pathogenic Strain to control Blattella germanica.