Vol. 20 No. 1
Efficacy assessment of Bispyribac Sodium 9.5% + Penoxsulam 7.8% SC for weed management in winter rice
Author(s): MD. A. HOSSAIN, S. MOI, B. MANDAL, S. SARDAR, D. SEAL AND B. C. PATRA
Abstract: A field experiment was conducted in the New Alluvial Zone of West Bengal (22°93? N, 88°53? E and 9.75m MSL) during the kharif seasons of 2018 and 2019 to manage weeds in transplanted winter rice at the Instructional Farm, Jaguli, Bidhan Chandra Krishi Viswavidyalaya, Nadia, West Bengal, using Randomized Block Design with eight treatment combinations replicated thrice. The results demonstrated that bispyribac sodium 9.5% + penoxsulam 7.8% SC @ 25.65 + 21.06 g a.i. ha-1 and bispyribac sodium 9.5% + penoxsulam 7.8% SC @ 23.75 + 19.5 g a.i. ha-1 achieved significantly higher grain and straw yield among chemical treatments which were statistically similar with twice hand weeding treatment. Bispyribac sodium 9.5% + penoxsulam 7.8% SC @ 25.65 + 21.06 g a.i. ha-1 generated higher net return and benefit-cost ratio. Although both Bispyribac sodium 9.5% + Penoxsulam 7.8% SC @ 23.75 + 19.5 g a.i. ha-1 and Bispyribac sodium 9.5% + Penoxsulam 7.8% SC @ 25.65 + 21.06 g a.i. ha-1 exhibited improved weed control efficiency, net return, and benefit-cost ratio as compared to twice hand weeding treatment, Bispyribac sodium 9.5% + Penoxsulam 7.8% SC @ 23.75 + 19.5 g a.i. ha-1 might be adopted ensuring better environmental safety.
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