Efficacy of different fungicides for management of powdery mildew of mango in West Bengal.
Ray S. K.
Author Affiliation: AICRP on Sub-Tropical Fruits, Directorate of Research, Bidhan Chandra Krishi Viswavidyalaya, Kalyani 741 235, West Bengal, India.
Journal of Mycopathological Research 41 : 153-155
Abstract : Seven fungicides at different concentrations were tested for their efficacy in reducing the powdery mildew of mango (caused by Oidium mangiferae) under field conditions (West Bengal, India). The fungicides were: carbendazim (Bavistin 50 WP) at 0.1%, dinocap (Karnathane 48 EC) at 0.05, 0.075 and 0.1%, wettable sulfur (Sulfex 80 WP) at 0.25%, triademefon (Bayletan 25 WP) at 0.05 and 0.1%, carbendazim (12%) + mancozeb (Companion 63%) at 0.2%, carbendazim + mancozeb at 0.25%, thiophanate-methyl (Roko 70 WP) at 0.1%, pentaconazole (Topas 10% EC) at 0.05% and the control. Two years experimentation (2000-02) on susceptible cultivar Himsagar at bearing showed that all the fungicides reduced the disease significantly when applied at pre-bloom, 10 days after 1st spray and at fruit setting stage compared to the untreated control. Results revealed that triadimefon showed minimum disease severity (2.87%) followed by dinocap (4.10 and 5.76%) and penconazole (7.29%) applied at a concentration of 0.1, 0.1, 0.05 and 0.05% respectively and their differences in reduction in disease severity were not statistically significant. Reduction in disease severity also increased the average number of fruits per branch from 448.75 to 1142.08% over the untreated control by application of different fungicides.