Laboratory evaluation of fungicides and botanicals against Alternaria alternata causing post harvest disease in mango.
Kumar M. K. P., Nargund V. B., Khan A. N. A.
Author Affiliation: Department of Plant Pathology, College of Agriculture, UAS, GKVK, Bangalore - 560 065, India.
Mysore Journal of Agricultural Sciences 40 : 21-26
Abstract : A study was conducted to evaluate the efficacy of nine fungicides and three botanicals against Alternaria alternata infecting harvested mangoes. Treatments comprised: carbendazim, benomyl, tricyclazole and thiophanate-methyl (all at 0.025, 0.050 and 0.100% concentrations); copper oxychloride, chlorothalonil, iprodione, mancozeb, and sulfur (all at 0.10, 0.20 and 0.30% concentrations); and Ocimum leaf extract, onion bulb extract and neem leaf extract (all at 1.25, 2.50 and 5.00% concentrations). Among the systemic fungicides, tricyclazole was the most effective (57.49%), followed by thiophanate-methyl (56.85%), benomyl (16.90%) and carbendazim (13.78%) in inhibiting the growth of A. alternata. Among the five non-systemic fungicides, iprodione recorded the highest mycelial growth inhibition (84.14%), followed by copper oxychloride (77.97%), mancozeb (68.93%) and chlorothalonil (64.30%). The least mycelial growth was observed in sulfur (15.79%). Among the botanicals, Ocimum leaf extract was the best in inhibiting the mycelial growth of A. alternata (77.62%), followed by neem leaf extract (45.30%). The least mycelial inhibition of A. alternata was observed in onion bulb extract (22.50%).