Rice is a vital food crop, extensively cultivated in India and forming a key part of diets worldwide. It plays a crucial role in global food security, especially in the Asia-Pacific region, where 56% of the population resides, producing and consuming over 90% of the world’s rice. Several factors reduce rice productivity, with weed infestation being the primary biotic threat in transplanted rice. Weeds grow faster, dominate the crop environment, and significantly diminish rice yield potential. To address this challenge, a field experiment was conducted during the Samba season (Rabi) to assess various weed management practices in transplanted rice grown in sodic soil and to examine any residual effects on a succeeding green gram crop. The experiment was designed as a randomized block design with three replications, testing the effectiveness of pre-emergence herbicides, early post-emergence herbicides, and post-emergence herbicides combined with hand weeding, alongside an unweeded control. The results revealed that the pre-emergence application of bensulfuron-methyl + pretilachlor at 60 + 600 g a.i. ha–1 on 3 DAT, followed by hand weeding at 40 DAT (T4), produced the highest grain yield and significantly reduced weed dry weight. Importantly, no residual herbicide effects were observed on the succeeding green gram crop

Transplanted rice, Herbicides, weed dry weight, WCE, Residual effects

This investigation concluded that for transplanted rice grown in sodic soils, the pre-emergence application of bensulfuron methyl + pretilachlor at 60 + 600 g a.i. ha⁻¹ on 3 DAT, followed by hand weeding on 40 DAT, significantly improved growth, straw yield, and yield attributes. This treatment provided broad-spectrum weed control and resulted in higher net returns and a favourable B : C ratio, with performance closely followed by the two hand weeding treatment. Therefore, this herbicide application strategy can be recommended for effective weed control, promoting growth and yield in transplanted rice, with no residual effects on the succeeding green gram

C. Nivetha, G. Srinivasan, P.M. Shanmugam and R. Mohan (2024). Effect of Low Dose High Efficacy Herbicides on Growth and Yield of Transplanted Rice under Sodic Soil and their Residual Effects on Succeeding Greengram. Biological Forum – An International Journal, 16(9): 160-164