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Bio-efficacy and phytotoxicity of ethoxysulfuron on the weed control and yield performance of transplanted kharif rice in gangetic alluvial soil of West Bengal


Bio-efficacy and phytotoxicity of ethoxysulfuron on the weed control and yield performance of transplanted kharif rice in gangetic alluvial soil of West Bengal



Journal Of Crop And Weed: 1, 38-40



Field experiment was conducted on gangetic alluvial soil of West Bengal with nine treatments viz., T1: Ethoxysulfuron 60 WG @ 15 g ha-1, T2: Ethoxysulfuron 60 WG @ 17.5 g ha-1, T3: Ethoxysulfuron 60 WG @ 20 g ha-1, T4: Ethoxysulfuron 60 WG @ 40 g ha-1, T5: Ethoxysulfuron 15 WP @ 18.5 g ha-1, T6: Almix 20 WP @ 4 g ha-1 all applied at 15 DAT, T7: 2,4-DEE 38 EC @ 400 g ha-1 at 20 DAT, T8: Hand weeding twice at 20 and 40 DAT and T9: Unweeded control replicated thrice in kharif 2005-2006 to study the bio-efficacy and phytotoxicity of Ethoxysulfuron. Among the herbicidal treatments, Almix 20 WP @ 4 g ha-1 applied at 15 DAT as post-emergence effectively control all categories of weeds resulted minimum biomass production of weeds (4.45 g m-2), minimum weed index (1.37) and higher weed control efficiency (90.44%) which ultimately produced higher grain yield (5.01 t ha-1) and gave maximum monetary return (21801.98) and benefit:cost ratio (1.41). Although Hand weeding twice at 20 and 40 DAT recorded maximum grain yield (5.08 t ha-1), however, it was statistically at par with the previous treatment. The herbicide Ethoxysulfuron at different doses did not show any phytotoxic effect on crop except the highest dose which caused injury at initial stage of the crop but recovered within a short period.

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