Effect of Weed Management Practices on Weed Dynamics, Growth, Yield and Yield Attributes of Rice (Oryza sativa L.)

Abstract

A field experiment was conducted on sandy loam soil at Crop Research Centre of Sardar Vallabhbhai Patel University of Agriculture & Technology, Meerut, U.P. during kharif (July –October), 2019 in randomised block design with three replications. The study comprised of ten different statistical treatments for weed management practices in transplanted rice and various observations were recorded during the crop growth period. The results indicated that the application of Pretilachlor (750 g a.i/ha) at 3 DAT + Penoxsulam (22 g a.i/ha) at 20 DAT significantly reduced the weed population and dry weight over weedy check. The highest plant height, number of tillers (m-2), dry matter accumulation, leaf area index, panicle length, filled grains, unfilled grains, higher protein content, 1000-grain weight and grain yield (38.80 q ha-1), were recorded with the application of Pretilachlor (750 g a.i/ha) at 3 DAT + Penoxsulam (22 g a.i/ha) at 20 DAT, which established itssuperiority over rest of the herbicidal treatments. Among weed management treatments, Pretilachlor (750 g a.i/ha) at 3 DAT + Penoxsulam (22 g a.i/ha) at 20 DAT (T8) found excellent to control weed population and increase growth parameter, yield attributes and crop productivity.