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Efficacy of various fungicides on growth of Colletotrichum musae Berk. & Curt. Causing banana anthracnose in vitro

Abstract

Banana is one of the important fruit crops and economically profitable crop of India having high export potential. Cultivated banana is susceptible to many diseases, among them Colletotrichum musae has been the most notorious fungal pathogen. C. musae infects wounded green fruits and also ripe fruit, as well as has been reported causing crown and tip rot of banana. The anthracnose symptoms appeared as peel blemishes, black or brown, sunken spots on banana fruits. The spots bear masses conidia and salmon coloured acervuli sometimes. To know the effect of different 20 fungicides viz., non systemic (chlorothalonil, mancozeb, copper oxychloride, copper hydroxide, captan, wettable sulphur at 500, 1000, 1500 and 2000 ppm), systemic (carbendazim, benomyl, fosetyl-Al, metalaxyl, propiconazole, thiophanate methyl, picoxystrobin at 50, 100, 250 and 500 ppm) and readymix  captan+hexaconazole, azoxystrobin+tebuconazole, zineb+hexaconazole, tebuconazole+trifloxystrobin at 100, 250, 500 and 1000 ppm) fungicides were tested for their effect on mycelium growth of Colletotrichum musae using poisoned food technique at four concentrations. Among them, in case of non systemic fungicides, cent per cent mean growth inhibition of test fungus was observed in mancozeb 75% WP at 2000 ppm and found significantly superior over all other fungicides. Looking to the systemic fungicides, the results revealed that among the all seven fungicides, carbendazim 50% WP at 50, 100, 250 and 500 ppm was found superior and gave cent per cent inhibition of test pathogen. Among the different seven ready mix fungicides the mixture of carbendazim 12%+mancozeb 63% WP at 100, 250, 500 and 1000 ppm were significantly superior among all the fungicides with cent per cent mean growth inhibition.

RR Mevada*, HJ Kapadiya, CM Bhaliya, JR Talaviya

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