Vol. 11, Issue 11 (2022)

Rice (Oryza sativa L.) crop is the backbone of livelihood for millions of rural households and plays vital role in the country’s food security, so the term “rice is life” is most appropriate in Indian context. Due to intensive cultivation of rice–wheat sequence, the weed flora simplified with grasses. For future productivity gain in rice in India, high-yielding varieties that might have resistance to multiple stresses (abiotic and biotic stress) particularly in the wake of climate change need to be explored. The present study was conducted during the kharif season of 2020-21 & 2021-22 at the crop research center of G. B. Pant University of Agriculture & Technology, Pantnagar, U. S. Nagar (Uttarakhand). The Purpose of the study was to examine the effect of weed control treatments on growth and productivity of rice under different mode of establishment. The experiment was laid out in split plot design taking 3 establishment methods i.e. Mechanical Transplanting (TP),Wet direct seeded rice (WDSR) & Dry direct seeded rice (DSR) as main plot and 4 weed management practices i.e. Weedy check (T1), Mechanical Weeding (T2), Chemical weeding (T3) & Weed free (T4)as sub plot treatment. Rice crop, in general, faces the problem of both grassy and non-grassy weeds. Therefore, it is, necessary to control weeds so as to reduce the competition for nutrients, moisture, radiant energy, and to obtain higher fertilizer and water use efficiency. Important weeds which are commonly associated with rice are composed of Caesulia axillaris, and Ludwigia spp. among the broad leaved weeds, and Cyperus rotundus, Leptochloa chinensis, Elusine indica and Echinochloa colona among the grassy weeds. Results showed that the diversity of grassy & non grassy weeds are more in case of DSR followed by WDSR method of establishment. T4 produced significantly better control over the T2 and T3 management practices. However the T2 & T3 also gave the significant control of weeds over the weedy check. So, this approach can minimize the crop weed competition a step forward in sustainable agriculture.