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Crop Research

Dynamics of weed suppression and crop response to herbicides under different establishment methods in Kharif rice (Oryza sativa L.)


DOI: 10.31830/2454-1761.2025.CR-1055    | Article Id: CR-1055 | Page : 266-272
Citation :- Dynamics of weed suppression and crop response to herbicides under different establishment methods in Kharif rice (Oryza sativa L.). Crop Res. 60: 266-272
NASRIN BEGUM1, SUNITA MEHER, RAJESH SHRIRAM KALASARE, SUJAY KUMAR PAUL, NIRMALA PATEL AND BIKRAMJEET GHOSE sunitameher60@gmail.com
Address : M.S. Swaminathan School of Agriculture, Centurion University of Technology and Management, Paralakhemundi-761211, Odisha, India
Submitted Date : 9-08-2025
Accepted Date : 28-08-2025
Online Published:

Abstract

Rice is a staple food for much of the world, grown mainly in tropical and subtropical regions. Conventional transplanting, though widely practised, is increasingly challenged by labour and water scarcity. Dry direct seeding has emerged as a promising alternative, offering savings in time, labour, and water, but heavy weed pressure limits its potential. Since, rice is cultivated across diverse ecosystems that differ in weed flora and dynamics; hence, appropriate weed management strategies are essential to tackle this variation. Since herbicides offer the fastest and most efficient control option, an experiment was carried out to evaluate the effectiveness of different pre- and post-emergence herbicides during the Kharif season of 2024 at the Post Graduate Research Farm, M. S. Swaminathan School of Agriculture, Centurion University of Technology and Management, Paralakhemundi, Odisha. The experiment was laid out in a split plot design with three replications, two crop establishment methods - transplanted rice (TPR) and dry seeded rice (DSR) were assigned to the main plots, while five weed management practices were tested in subplots: including pre-emergence (PE) that is pretilachlor and post-emergence (PoE) included: fenoxaprop-p-ethyl, ethoxysulfuron and pyrazosulfuron-ethyl with a test rice variety RNR-15048. Results indicated that transplanted rice outperformed dry-seeded rice in terms of weed suppression, growth, and yield attributes, with a 33% yield advantage. Among weed management strategies, pretilachlor fb pyrazosulfuron-ethyl proved most effective, showing comparable performance to hand weeding in terms of weed control efficiency (82.76%), and yield reduction of only 5% with highest B:C ratio (1.66) among all treatments, surpassing hand weeding as well, which showed a B:C ratio liability of 41% due to engagement of labours. Therefore, the combined use of pretilachlor and pyrazosulfuron-ethyl in either rice establishment method can significantly enhance productivity and contribute to food security.

Keywords

Crop productivity establishment methods growth study herbicidal control rice weed control efficiency

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