German cockroach, Blattella germanica, a globally distributed sanitary pest, has become a big threat to human health. The commonly used pesticides against B. germanica are chemicals pesticides. However, the fact that B. germanica has developed resistance to such chemical pesticides turns our eyes to biopesticides. Entomogenous fungi are just an important type of such biopesticides. The anti- B. germanica activity of entomogenous fungi has already been studied.However, due to the existence of antibacterial p...