Antimycotic activities of some rhizosphere fungi against Myrothecium roridum causing leaf spot of cotton

A study was undertaken to investigate the antimycotic activities of some rhizosphere fungi of cotton against Myrothecium roridum. A total of five species viz. Aspergillus flavus, A.niger, Trichoderma viride, T.harzianum and P.oxalicum were tested for antimycotic activity against Myrothecium roridum by dual culture method in in vitro. There was little difference among the rhizosphere fungi in causing inhibition of the pathogen after three days of inoculation in dual culture, but significant difference was observed on 5^th days of incubation. Fast growing antagonist was found to be most promising than slow growing antagonist. Among the five antagonists tested in vitro against Myrothecium roridum, T.harzianum was found to be most effective as compared to others.