The Influence of Different Post-emergence Herbicide Mixtures on the Physiological Traits and Yield of Irrigated Wheat (Triticum aestivum L.). in Madhya Pradesh, India
Raghav Patel *
Department of Agronomy, College of Agriculture, Rajmata Vijayaraje Scindia Krishi Vishwa Vidyalaya, Gwalior (M.P.), 474002, India.
Janmejay Sharma
Department of Agronomy, College of Agriculture, Rajmata Vijayaraje Scindia Krishi Vishwa Vidyalaya, Gwalior (M.P.), 474002, India.
Neeraj Hada
Department of Agronomy, College of Agriculture, Rajmata Vijayaraje Scindia Krishi Vishwa Vidyalaya, Gwalior (M.P.), 474002, India.
Nisha Singh
Department of Agronomy, College of Agriculture, Rajmata Vijayaraje Scindia Krishi Vishwa Vidyalaya, Gwalior (M.P.), 474002, India.
Rahul kumbhare
Department of Agronomy, College of Agriculture, Jawaharlal Nehru Krishi Vishwa Vidyalaya, Jabalpur (M.P.) 482004, India.
Richa Singh
Department of Agronomy, College of Agriculture, Rajmata Vijayaraje Scindia Krishi Vishwa Vidyalaya, Gwalior (M.P.), 474002, India.
Sonali Singh
Department of Agronomy, College of Agriculture, Rajmata Vijayaraje Scindia Krishi Vishwa Vidyalaya, Gwalior (M.P.), 474002, India.
*Author to whom correspondence should be addressed.
Abstract
The present investigation was conducted during the rabi season of 2022-23 and 2023-24 at the agronomy research farm of Rajmata Vijayaraje Scindia Krishi Vishwa Vidyalaya, Gwalior (M.P.). The experiment was carried out in a Randomized block design with eight treatments and three replications. The values of LAI, CGR and AGR were increasing up to 90 DAS and RGR upto 60 DAS growth stage and then declined upto maturity. Among the weed control treatments, the highest values of LAI, CGR, RGR and AGR were recorded under weed free plot which was followed by post-emergence application of Pyroxasulfone 85% WG + Metsulfurone 20% WG @ 127.5 + 4 g/ha and post-emergence application Metsulfurone Methyl 20% WP @ 4 g/ha + Clodinafop propargyl 15 WP @ 60 g/ha at almost all the crop growth stage. The results indicated that the combined application of post-emergence Pyroxasulfone 85% WG + Metsulfurone 20% WG @ 127.5 + 4 g/ha significantly enhanced plant height, leaf area and dry matter production, followed by the post-emergence application of Metsulfurone Methyl 20% WP @ 4 g/ha + Clodinafop Propargyl 15 WP @ 60 g/ha. These treatments performed better than the control and were statistically comparable to the weed-free plot.
The highest grain yield, straw yield and harvest index was recorded in the weed-free plot, while the lowest yield was observed in the weedy check plot. However, the combined application of Pyroxasulfone 85% WG + Metsulfurone 20% WG @ 127.5 + 4 g/ha resulted in grain yield, straw yield and harvest index statistically similar to the weed-free plot, demonstrating its effectiveness in controlling weeds and enhancing crop productivity.
Keywords: Weed control, hand weeding, weed flora, yield attributes, wheat grain, physiological traits, pyroxasulfone, leaf area index (LAI), crop growth rate (CGR), relative growth rate (RGR), absolute growth rate (AGR)