Study on Antagonism of Trichoderma spp.Obtained from Soil to Pathogenic Fungi

Three Trichoderma spp strains.: Trichoderma harzianum,Trichoderma viride,and Trichoderma virens were obtained from soil.The antagonism of three Trichoderma spp.against Rhizoctonia solania in wheat and Botrytis cinerea in tomato was tested.The results suggested that Trichoderma spp.showed different antagonistic effect to tested plant pathogenic fungi and the Trichoderma virens showed the stronger antagonistic effect to tested plant pathogenic fungi.The phenomena that hypha of plant pathogenic fungi were coiled,penetrated and their cytoplasm became thinning were observed under microscope.