Efficacy of systemic fungicides against Sclerotium rolfsii causing chickpea collar rot

Collar rot of chickpea caused by Sclerotium rolfsii has a major constraint and potential threat to successful chickpea cultivation. Therefore efforts were made to evaluate the different systemic fungicides in vitro condition against Sclerotium rolfsii. Seven systemic fungicides were evaluated (@ 500, 1000 and 1500 ppm) in vitro against S. rolfsii by poison food technique. However, 100% mycelial inhibition was recorded with difenconazole 25% EC, hexaconazole 5% EC, propiconazole 25% EC, tebuconazole 25.9 EC. These were followed by pyraclostrobin 20 WG (76.05%), carbendazim 50% WP (56.13%) and the fungicide thiophanate methyl 70% WP was found comparatively less effective with 18.49 per cent inhibition, of the test pathogen.