S. Soundhar Rajan, A.P. Srinivasa Perumal, A. Sundari, M. Thiruppathi, J. Nambi and R. Manivannan
Abstract
The field investigation was conducted at the Experimental Farm, Department of Agronomy, Faculty of Agriculture, Annamalai University, to assess weed management practices aimed at enhancing the yield of transplanted rice during the Kharif season (June- September 2023) utilizing a randomized block design with eight treatments and three replications, employing the rice variety ADT 43. The results indicate that hand weeding twice on 20 and 40 DAT significantly reduced the weed population and their dry weight effectively over other treatments. Among the herbicides, pre-emergence application of Penoxsulam 0.97% + Butachlor 38.7% and Post emergence application of Bispyribac sodium 10% SC was efficiently controlled wide range of weeds and recorded higher values of weed control on efficiency, weed control index, nutrient removal by weeds, straw and grain yield of transplanted rice. It was at are par with hand weeding twice on 20 and 40 DAT. Thus, it can be concluded that application of Penoxsulam 0.97% + Butachlor 38.7% as pre-emergence and application of Bispyribac sodium 10% SC post-emergence has proved superior over rest of the chemical treatments, with respect to efficient weed control, with enhanced yield in transplanted rice under the labor-scarce condition.