1Department of Agronomy, Faculty of Agriculture, Uttar Banga Krishi Viswavidyalaya, Pundibari, Coochbehar-736 165, West Bengal, India
2Department of Agronomy and Agroforestry, M.S. Swaminathan School of Agriculture, Centurion University of Technology and Management, Paralakhemundi, Gajapati-761 211, Odisha, India
3Regional Research Station, Terai Zone, Uttar Banga Krishi Viswavidyalaya, Pundibari, Coochbehar-736 165, West Bengal, India
4Regional Research Station, Terai Zone, Uttar Banga Krishi Viswavidyalaya, Kharibari, Darjeeling-734 427, West Bengal, India
*Corresponding Author: Triptesh Mondal, Department of Agronomy and Agroforestry, M.S. Swaminathan School of Agriculture, Centurion University of Technology and Management, Paralakhemundi, Gajapati-761 211, Odisha, India, Email: mtriptesh@gmail.com
Online Published on 14 November, 2024.
Now a days chemical control measures alone develop resistance in different weed species. Integrative weed management techniques are more effective and sustainable than chemical management. Based on these facts, a field experiment was conducted during kharif, 2019 and 2020 at Uttar Banga Krishi Viswavidyalaya to investigate the impact of integrative weed management treatments on growth attributes, yield attributes, yield, weed indices and economics of paddy.
The experiment was laid out in randomized block design with four replications. In each replication, five integrated weed management treatments were done namely, pretilachlor followed by paddy weeder (P1), pyrazosulfuron ethyl followed by metsulfuron methyl + chlorimuron ethyl (P2), bispyribac sodium followed by paddy weeder (P3), completely no weed (P4) and weedy check (P5).
Among the chemical and integrative weed control options, bispyribac sodium + paddy weeder i.e., treatment P3 showed significantly better results than others in case of all the growth attributes and yield attributes except 1000-grain weight. Significantly higher grain yield than all other treatments were recorded in treatment P4i.e., complete weed free (6.68 t ha-1) followed by treatment P3i.e., bispyribac sodium + paddy weeder (6.54 t ha-1). Among all the treatments, weed indices like weed control index (80.17, 72.30 and 82.51% at 30, 45 and 60 DAT, respectively) and weed control efficiency (76.48, 79.01 and 80.79% at 30, 45 and 60 DAT, respectively) showed highest results on all the dates whereas weed persistence index at 90 DAT (0.91) and weed index (2.10%) were calculated lowest in treatment P3i.e., bispyribac sodium + paddy weeder after treatment P4i.e., completely no weed treatment. This study also indicated rice treated with P4i.e., weed free showed highest gross return (｀ 116700 ha-1) and rice treated with P3i.e., bispyribac sodium at 15 DAT + paddy weeder at 30 DAT showed highest net return (｀ 59269 ha-1) and benefit:cost (2.07).
Bispyribac sodium, Integrative weed management, Paddy weeder
