In vitro efficacy of non-systemic and combi fungicides against wilt of tomato caused by Fusarium oxysporum f. sp. lycopersici

Abstract

Tomato (Lycopersicon esculentum Miller) crop suffers from several diseases, among which wilting caused by Fusarium oxysporum f. sp. lycopersici is one of the serious diseases observed regularly in tomato growing areas. Therefore, efforts were made to evaluate the efficacy of different non-systemic and combi fungicides in vitro against Fusarium oxysporum f. sp. lycopersici by poisoned food technique. Among the Five non-systemic and four combi fungicides tested in vitro, against Fusarium oxysporum f. sp. lycopersici, carbendazim 25% + mancozeb 50% at all three different concentrations (@ 1500, 2000 and 2500 ppm) showed complete (100%) mycelial inhibition, followed by tebuconazole 50% + trifloxystrobin 25% (90.55%), carboxin 37.5% + thiram 37.5% (89.32%), copper hydroxide (50.93%), propineb (33.71%), copper oxychloride (31.61%), metalaxyl 4% + mancozeb 64% (31.36%) and mancozeb (25.68%). The fungicide chlorothalonil was found comparatively less effective with 18.90 per cent inhibition of the test pathogen over untreated control.