Antagonism of Trichoderma harzianum NF9 and Trichoderma virens TY against Three Plant Fungous Pathogens

The fungous Trichoderma is an important microorganism in the biological control of plant diseases.The antagonism of Trichoderma harzianum NF9 and Trichoderma virens TY against three soil-borne plant fungous pathogens,Fusarium oxysporum Schl.f.sp.cucumerin Owen,Sclerotium rolfsii and Fusarium oxysporum Schl.f.sp.niveum,were tested in vitro by dual-culture.The result showed that two Trichoderma isolates had antagonism effect on the tested pathogens,and Trichoderma harzianum NF9 was better than Trichoderma virens TY in antagonism effect.