Biocontrol efficacy of Trichoderma viride isolates against fungal plant pathogens causing disease in Vigna radiata L.

B.K. Mishra, Rohit Kumar Mishr

Abstract

Several isolates of Trichoderma viride, isolated from different region of Allahabad district were selected for antagonistic screening against fungal pathogens such as Rhizoctonia solani, Sclerotium rolfsii, Macrophomina phaseolina, Alternaria alternata, Fusarium solani and Colletotrichum capsici of Moong bean (Vigna radiata). The isolate Tr 8 showed 70%, 68.2%, 70%, 73.3%, 69.3% and 70.1% growth inhibition against R. solani, S. rolfsii, M. phaseolina, A. alternata, F. solani and C. capsici respectively. The cell free culture filtrate of T. viride Tr 8 showed 61.5, 58.32, 63.45, 62.62% radial growth at 10% concentration against R. solani, S. rolfsii, M. phaseolina, C. capsici respectively. While, 20% concentration observed 100% mycelial growth inhibition. Thus, the Trichoderma viride isolate Tr 8 could be further exploited for commercial scale up under localized climatic conditions.