Efficacy of fungicides against Fusarium oxysporum f. sp. udum associated with wilt of pigeonpea

In vitro efficacy of fungicides was tested against Fusarium oxysporum f. sp. udum causing wilt of pigeonpea using Poision Food Technique. All seven systemic fungicides tested at 500 and 1000 ppm were significant in recording minimum mycelial growth and maximum inhibition of Fusarium oxysporum f. sp. udum over the control. Among systemic fungicides, Carbendazim 50% WP achieved the highest inhibition of mycelial growth of Fusarium. followed by Tebuconazole 25.9% EC, Propiconazole 25% EC, Thiophanate Methyl 70% WP, Difenoconazole 25% EC, Hexaconazole 5% EC and Azoxystrobin 23% SC. Seven contact and combi fungicides were also found effective over control in recording least mycelial growth and maximum inhibition. Among combi fungicides, Carbendazim 12% + Mancozeb 63% WP provided the highest inhibition followed by Tebuconazole 50% + Tryfloxystrobin 25% WDG, Captan 70% + Hexaconazole 5% WP, Captan 50% WP, Chlorothalonil 75% WP, Mancozeb 75% WP and Copper oxychloride 50% WP.