In vitro efficacy of non systemic, systemic and ready-mix fungicides against Colletotrichum sorghi (Cesati.) Wilson causing anthracnose of sorghum

The efficacy of different non systemic, systemic and ready-mix fungicides were tested under in vitro condition against Colletotrichum sorghi (Cesati.)Wilson causing anthracnose of sorghum using poisoned food technique. All the fungicides tested were capable of inhibiting the mycelial growth of C. sorghi at various concentrations as compared to control. Mancozeb 75% WP among non systemic fungicides exhibited mean mycelial growth inhibition of 80.44 per cent. Wettable sulphur 80% WP was the least effective fungicide with mean mycelial growth inhibition of 48.24 per cent. Carbendazim 50% WP, thiophanate methyl 70% WP and benomyl 50% WP among systemic fungicides found best effective and recorded maximum mean mycelial growth inhibition of 99.98, 99.47 and 99.00 per cent, respectively. Whereas, the least effective fungicide was picoxystrobin 22.52% SC with mean mycelial growth inhibition of 77.32 per cent and was found statistically at par with fosetyl-Al 80% WP with mean mycelial growth inhibition of 79.88 per cent. Among ready-mix fungicides, carbendazim 12% + mancozeb 63% WP and carboxin 37.5% + thiram 37.5% WS found equally effective giving 99.98 per cent mean mycelial growth inhibition. While, cymoxanil 8% + mancozeb 64% WP exhibited 64.19 per cent mycelial growth inhibition and remain less effective under laboratory condition.