Evaluation of Weed Management Approaches on Weed Dynamics, Yield and Economics of Puddled Rice Under Different Plant Techniques

Abstract

The development of high-yield crop varieties has been hindered in recent years due to poor weed management, resulting in decreased potential. Maximum crop yields cannot be achieved without effective weed management, particularly in rice. This study delves into various weed management practices and planting techniques tailored for rice cultivation. A field experiment was conducted from January to May 2022 (Navarai) to find out the effective weed management practices in puddled rice. The experiment was carried out in a split-plot design, which included two planting techniques, viz., drum-seeded rice and system of rice intensification (SRI) in the main plot, as well as eight weed management practices, viz., hand weeding, cono weeding, pretilachlor, bispyribac sodium and fenoxaprop – p – ethyl as pre and post emergence application in subplot. The results of the experiment demonstrated that among the planting techniques and weed management practices tested, the system of rice intensification and sequential application of pretilachlor @ 0.5 kg a.i ha-1 fb bispyribac sodium @ 20 g a.i ha-1 has revealed the lowest weed density and highest weed control efficiency, yield and gross and net income. However, drum-seeded rice resulted in a higher return-1 rupee invested due to the lower cost of cultivation.

Keywords: drum seeded rice, bisyribac sodium, puddled rice, pretilachlor, SRI