Pantnagar Journal of Research

Abstract

A field study was carried out on weed infestation in kharif maize in the Tarai region of India in RBD having 12 different weed management treatments, viz., Atrazine 1.0 kg a.i./ha (PE) fb hand hoeing at 21 DAS; Tembotrione 34.4% SC at 120 g a.i./ha at 20 DAS; Topramezone 33.6% SC at 25.2 g a.i. /ha at 20 DAS; Atrazine 1.0 kg a.i./ha (PE) fb tembotrione 34.4% SC at 120 g a.i./ha at 20 DAS; Atrazine 1.0 kg a.i./ha (PE) fb topramezone 33.6 % SC at 25.2 g a.i./ha at 20 DAS; Tembotrione 34.4% SC at 120 g a.i./ha at 20 DAS fb halosulfuron methyl 67.5 g a.i./ha at 30 DAS; Topramezone 33.6% SC at 25.2 g a.i./ha at 20 DAS fb halosulfuron methyl 67.5 g a.i./ha at 30 DAS; Atrazine 1.0 kg a.i./ha (PE) + residue of Wheat as mulch 5t/ha; Maize + Mungbean (1:1) intercropping; at 20 and 40 DAS Hand Weeding, Weed-free and weedy in 03 replications at Pantnagar during kharif 2023. Hand weedings at 20 days after sowing controlled the weed density by 81.1% at 30 DAS and at 40 days after sowing reduced the density of weeds 67.8% after 60 days of sowing and produced the highest grain yield (6.4 t/ha) compared to the weedy check plot, followed by application of atrazine 50% WP at 1000 g a.i./ha fb hand hoeing at 21 DAS (6.14 t/ha grain yield), atrazine 50% WP at 1.0 kg a.i./ha fb tembotrione 34.4% SC at 120 g a.i./ha (6.03 t/ha grain yield), and atrazine 50% WP at 1.0 kg a.i./ha fb topramezone 33.6% SC at 25.2 g a.i./ha (5.96 t/ha grain yield), proving effective weed-free treatments