Antagonistic Potential of Different Isolates of Trichoderma against Rhizoctonia solani

Trichoderma spp. is the most promising and effective bioagents against several soil borne plant pathogenic fungi. In present study, 26 isolates of Trichoderma were isolated from soil of Jharkhand and screened for their antagonistic and antibiosis efficacy against Rhizoctonia solani by dual culture. Result indicated that the antagonistic potential of 26 isolates of Trichoderma spp. against R. solani were varied which inhibited R. solani ranges 33-54%. Among isolates of Trichoderma, seven isolates showed strong antagonistic potential which inhibited >50% mycelial growth of R. solani, viz., RCT1 (53.71%) followed by RCT22 (52.6%), RCT3 (51.85%), RCT7 (51.11%), RCT10 (50.37%), RCT 8 (50%) and RCT14 (50%). Moreover, seventeen (17) isolates were also showed inhibitory but their antagonistic potential <50% of the mycelial growth while two isolates (RCT12 and RCT17) showed <40% mycelial growth. These potential isolates of Trichoderma may be further exploited as biocontrol agent against R. solani as well as other Soilborne phytopathogenic fungi