Efficacy of Trichoderma isolates against Sclerotium rolfsii causing collar rot of lentil

Lentil collar rot disease caused by Sclerotium rolfsii Sacc. is an important causing significant yield loss in Nepal. Seven Trichoderma spp. isolates collected from different regions of Nepal were tested for their capacity to inhibit mycelial growth in-vitro condition. Experiment was conducted Completely Randomized Design with four replications the plant pathology laboratory Grain Legumes Research Program, Khajura, Banke during 2020. Dual culture method performed assess efficacy isolates. inhibited S. various degrees ranging 48.33-72.47% after 120 hours inoculation. Maximum colony inhibition (72.47%) obtained Kapilvastu isolate followed Nepalgunj (67.72%). Minimum (48.33%) Mangalpur, Chitwan Rampur, (49.33%). Among seven isolates, two (Kapilbastu and Nepalgunj) showed good antagonistic activity against also highly competitive These would therefore be useful biological management.