Preliminary purification and characterization of antifungal substance produced by Bacillus cereus strain, BC98-I Isolating of antifungal activity substance from endophytic actinomycete Lj20 and the role in disease control The mechanism of biological control of strawberry gray mould using the marine bacterial NH-8 strain and analysis of the antifungal substances from the strain The antimicrobial characters of the fermenting liquor of BC98-Ⅰ(B.cereus) and its antifungal crude extraction on Fusarium oxysporum WTHZ(Schl.) f. sp. cucumerinum Owen Optimazation of Media for Culturing Endophytic Fungus Chaetomium globosum Isolated from a Poplar Detection and Dynamics of Antifungal Substances