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EFFICACY OF SOME CHEMICALS TO CONTROL THE MAJOR DISEASES OF BANANA AT THAKURGAON AND DINAJPUR DISTRICTS (Pages : 13 - 19)

R. PARVIN, R. FANCY, M.E.K. CHOWDHURY, S.M.E. HASSAN AND M.M. HASAN

The study was aimed to find out the effective chemicals to control the most devastating diseases of banana including sigatoka, panama and bunchy top in some selected orchard of Thakurgaon and Dinajpur districts. Altogether six banana orchards including three from each district were selected and the experiment was laid out following randomized block design with three replications. Two fungicides Carbendazim and copper oxychloride along with an insecticide imidacloprid were sprayed to evaluate their effect to control the diseases. Among the chemicals, carbendazim was found to show the minimum sigatoka severity (1.00%) after 150 days of plantation at Thakurgaon region where, copper oxychloride gave minimum sigatoka severity (1.00%) followed by carbendazim (10.00%) at Dinajpur region after 150 days of plantation. In both the region, highest sigatoka severity was observed without spraying any chemicals (40.00 and 61.00%). Minimum panama disease severity (5.00% and 1.00%) was recorded with the spraying of copper oxychloride both at Thakurgaon and Dinajpur, respectively. Carbendazim also showed the reduced panama severity (6.00 and 10.00%) after copper oxychloride in Thakurgaon and Dinajpur, respectively where, control gave the higher disease severity in both the regions. Imidacloprid increased the leaf area (4.0%), leaf number (2-folds) and plant height (2 leaves) where, carbendazim increased the leaf number (2-folds) and plant height (1 cm) and copper oxychloride increased the leaf area (4.0%) and plant height (2 cm). Plant without treated with any chemicals also found to increase the leaf number (2-folds) where it did not increase leaf area or plant height. All the chemicals used in this study show their effectiveness to control the major diseases of banana, however; copper oxychloride could be the suggested to treat several banana diseases.Download


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