Effect of intigrated weed management on growth and yield of kharif maize (Zea mays L.)

A field experiment was conducted during Kharif season of 2024 at Crop Research Farm. Department of Agronomy, SHUATS, Prayagraj, (U.P) to determine Integrated Weed Management in Kharif Maize (Zea Mays L.). The treatments included Paraquat at 2l/ha, Topramezone at 0.109l/ha. Halosulfuron at 67.5g/ha, Mesotrione at 96g/ha, Hand weeding at 20 and 40 DAS and control. The experiment was laid out in a Randomized Block Design with ten treatments each replicated thrice. As a result, Maximum plant height (186.57cm), plant dry weight (117.67g) was recorded with application of Weed free 3 hand weeding at 20, 40,60 DAS, Highest number of grains per row (26.40/row) was recorded with Weed free 3 hand weeding at 20, 40,60 DAS in, higher number of rows per cob (15.73), maximum 100 seed weight (21.67g),Maximum seed yield (4.67t/ha) and stover yield, (7.90) were recorded with the application of Topramezone@0.109l/ha as PoE at 40 DAS fb by Hand weeding (20, 40, DAS), maximum harvest index (45.48), was recorded with the application of Weed free (3hand weeding at 20,40and 60 DAS). the lowest weed density(39.5), The maximum weed control index (90.91%) and weed control efficiency (91.11%) was recorded with the application of Weed free 3 hand weeding at 20, 40,60 DAS, Among the pre and post-emergence herbicides applied alone, post-emergence application of Topramezone@0.109l/ha as PoE at 40 DAS) followed by Hand weeding at 20 and 40 DAS in treatment 4 has the lowest weed density(52.3), the maximum weed control index(84.30%) and weed control efficiency(85.42%) and the lowest weed index(-8.87%).