Vol. 11, Issue 10 (2022)

Author(s):
Vaishnavi P Kharbadkar, JJ Kadam, NV Dalvi, UR Phondekar, NV Chaure, RS Gaonkar and MS Joshi

Abstract:
In the present investigation, nine botanicals viz., Azadirachta indica, Sapindus mukorossi, Allium sativum, Calotropis procera, Psidium guajava, Vitex negundo, Gliricidia maculate, Solanum torvum and Lantana camara each at 10% concentration and nine fungicides viz., Difenconazole 50% EC, Thiophanate methyl 70%WP, Chlorothalonil 75% WP, Propiconazole 25% EC, Carbendazim 12% + Mancozeb 63% WP, Copper oxychloride 50%WP, Azoxystrobin 25% SC, Mancozeb 75% WP and Tebuconazole 50% + Trifloxystrobin 25% WG at different concentrations were evaluated in vitro for checking their efficacy against the chrysanthemum leaf blight causal fungus Alternaria alternata. Among all the plant extracts evaluated, Soapnut rind extract and neem leaf extract were most significantly effective in inhibiting the mycelial growth of A. alternata by 73.04% and 68.30%, respectively. Wild brinjal and Rui were least effective in controlling the mycelial growth of A. alternata with 31.82 and 20.96% inhibition, respectively. Amongst all the fungicides evaluated in vitro, propiconazole 25% EC @ 0.1% was emerged as the most promising fungicide in inhibiting mycelial growth of A. alternata with 94.07% inhibition over control. Thiophanate methyl 70% WP (0.1%) and chlorothalonil 75% WP (0.1%) were least effective which inhibited the mycelial growth of the test pathogen to the tune of 66.85% and 50.26%, respectively.