Integrated weed management in summer sorghum

A field experiment was conducted at College Farm, Navsari Agricultural University, Navsari (Gujarat) during summer season 2016 to study the effect of integrated weed management practices on weed density, weed dry weight and economics in sorghum. The experiment was laid out in randomized block design with three replications and ten treatments with pre-and post-emergence herbicides (atrazine, 2,4-D and metsulfuron-methyl) alone or combination of these herbicides followed by hand weeding and inter-culturing operation. That two hand weeding and inter-culturing operations at 20 and 40 DAS significantly reduced weed density and dry weight of broad-leaved, grassy and sedge weeds. Weed control efficiency was recorded to the range of 52.50–97.00%, with the highest value in two hand weeding and inter-culturing operations at 20 and 40 DAS and lowest in atrazine 0.50 kg/ha as pre-emergence fb metsulfuron-methyl 6 g/ha as post-emergence. Higher net return of ‘ 54623/ha was obtained with two hand weeding and inter-culturing operations at 20 and 40 DAS followed by ‘ 50179/ha with atrazine 0.50 kg/ha as pre-emergence fb atrazine 0.50 kg/ha as post-emergence at 25 DAS.