Evaluation of fungicides against Colletotrichum gloeosporioides Penz. inciting blossom blight of mango.
Das S. K., Panda S. N., Pani B. K.
Author Affiliation: Department of Plant Pathology, Orissa University of Agriculture & Technology, Bhubaneswar 751?003, India.
Environment and Ecology 16 : 623-624
Abstract : Eight fungicides were tested to determine their ability to control the causative agent of mango blossom blight Colletotrichum gloeosporioides [Glomerella cingulata] in vitro. The fungicides tested were carbendazim (as Bavistin), propiconazole (as Tilt), epoxiconazole (as Opus), tridemorph (as Calixin), metalaxyl + mancozeb (as Ridomil MZ-72), mancozeb (as Dithane M-45), copper oxychloride (as Blitox-50) and thiram. The fungicides were tested at 10, 50, 100, 250 and 500 µg/ml by incubating the fungus on media containing the fungicides for 7-10 days at 28°C. Of the 8 commercial fungicides evaluated against G. cingulata, propiconazole and epoxiconazole completely inhibited the linear mycelial growth at 50 µg/ml and higher concentrations. Carbendazim and metalaxyl + mancozeb inhibited linear mycelial growth at 250 µg/ml. Tridemorph effectively checked the total growth at 500 µg/ml. Mancozeb, copper oxychloride and thiram were moderately effective even at 500 µg/ml.