Abstract: In order to study the relationship between the crude protein extract of fermentation of Acremonium persicinum and powdery mildew on mungbean,the disease index was calculated,and the activity of superoxide dismutase (SOD),peroxidase (POD) and catalase (CAT),the content of malondialdehyde (MDA) were all determined.The results showed that the disease index of leaves spraying by crude protein extract was the lightest and new leaves were no longer infected by powdery mildew.Compared with the treatment of spraying sterile water,CAT activity increased by 71.70% (P<0.05) in the treatment of spraying crude protein,but POD activity decreased by 8.45% (P<0.05),MDA content decreased by 29.81% (P<0.05).The result confirmed a certain control effect of crude protein extracted from fermentation of A.persicinum on mungbean powdery mildew and on relative anti-resistance enzyme activities of mungbean.

Key words: Acremonium persicinum, crude protein of fermentation, mungbean, powdery mildew, disease index, anti-resistance enzyme activity