Two speices kinds of important entomopathogenic fungi Metarhizium anisopliae and Beauveria bassiana are widely applied to control pest in domestic and abroad. Generally they differentiate and develop a fine infection structure (appressorium) before penetrating the cuticle of host during infection procession. Appresspria as infectious structure of entomopathogenic fungi play key roles in pathogenicity by (a) secreting extracellular mucilaginous material; (b) producing several enzymes capable of a...