Integrated weed management in wheat under conservation agriculture-based maize-wheat-mungbean system Swain Abhisek1, Shekhawat Kapila2,*, Rathore S.S.3, Upadhyay Pravin K.4, Muduli Soumyadarshi5 1M.Sc. Scholar, Division of Agronomy, Indian Agricultural Research Institute, New Delhi110 012 2Senior Scientist, Division of Agronomy, Indian Agricultural Research Institute, New Delhi110 012 3Principal Scientist, Division of Agronomy, Indian Agricultural Research Institute, New Delhi110 012 4Scientist, Division of Agronomy, Indian Agricultural Research Institute, New Delhi110 012 5M.Sc. Scholar, Division of Agronomy, Indian Agricultural Research Institute, New Delhi110 012 *Corresponding author's Email: drrathorekapila@gmail.com
Online Published on 18 January, 2023. Abstract A field experiment was conducted on integrated weed management in wheat (Triticum aestivum L.) under conservation agriculture-based maize (Zea mays L.)-wheat-mung bean [Vigna radiata (L.) R. Wilczek] system during the winter (rabi) season of 2020–2021 at the ICAR-Indian Agricultural Research Institute, New Delhi. The experiment was carried out in a split-plot design, with 4 main plots having different establishment techniques, viz. conventional tillage (CT)-wheat, zero tillage (ZT)-wheat, ZT-wheat with previous brown manuring in maize and stale seed bed (SSB)-ZT wheat; and 4 subplots, viz. unweeded check, weed-free check, 1 hand-weeding at 25 days after sowing (DAS) and clodinafop-propargyl (60 g/ha) + carfentazone (20 g/ha) as tank-mix at 25–30 DAS. The results revealed that, the yield attributes and yield of wheat were significantly influenced by the weed-management practices under different establishment techniques. The establishment method, ZT-wheat with brown manuring in previous maize resulted in the highest crop yield, followed by SSB-ZT wheat. Among the weed-management options, clodinafop-propargyl (60 g/ha) + carfentazone (20 g/ha) as tank-mix at 25–30 DAS resulted in the highest growth, yield attributes and economics, which remained at par with hand-weeding. The highest grain yield (4.85 t/ha), straw yield (9.03 t/ha), and biological yield (14.32 t/ha) were recorded under ZT-wheat, with brown manuring in previous maize. A 16.5, 7.3 and 9.94% increase in grain, straw and biological yield, respectively, was recorded with clodinafop-propargyl (60 g/ha) + carfentazone (20 g/ha) as post tank-mix 25–30 DAS over unweeded check. The ZT-wheat showed 51.4% higher net returns over CT, followed by ZT-wheat and SSB-ZT wheat which showed 22.1 and 19.2% higher values, respectively, over CT. The highest benefit: cost (B: C) ratio was found in weed-free check which showed 21.9% higher value over unweeded check. Top Keywords Brown manuring, Herbicides, Integrated weed-management, Residue retention, Wheat, Zero tillage. Top |