The antagonism of Trichoderma viride Per.ex Fr.(T 02 ) against some soilborne fungal pathogens were tested in vitro.Trichoderma viride inhibited the hyphal growth of Sclerotium rolfsii Sacc.(S 01 ) and Fusarium semitectum Berk.& Rav.(F 04 ) on dual culture with inhibition index 2~3 and 2,respectively.The phenomena that hyphae of Fusarium semitectum were coiled,penetrated,lysed,broken and their cytoplasm became thinning on dual culture,were observed under microscope.A range of antibiotics was pro...