In-vitro efficacy of fungicides against Rhizoctonia solani by poisoned food technique

An in-vitro experiment was carried out for testing the efficacy of both systemic and contact fungicides by using poisoned food technique against Rhizoctonia solani. The present experiment was conducted in College of Post Graduate Studies in Agricultural Sciences, Central Agricultural University, Umiam, Meghalaya for the evaluation of different fungicides against the pathogen R. solani. The fungicides namely Carbendazim, Mancozeb, Saaf (Carbendazim 12% + Mancozeb 63% WP), Myclobutanil, Azoxystrobin, Tricyclazole, Pyraclostrobin, Metalaxyl, Propiconazole, Tebuconazole, Captan and Chlorothalonil were tested against R. solani with three different concentrations. Among twelve fungicides, Carbendazim was found most effective at all concentrations (0.05, 0.1 and 0.15%) with 95.77% growth inhibition. Metalaxyl at sub- lethal concentration of 0.14% was found least effective with growth inhibition of 34.11%. The results showed significant differences between different fungicides to inhibit the growth of R. solani.