Effect of different integrated weed management practices on yield and economics of dry direct seeded rice

A field experiment was conducted during 2017-2018 at N. E. Borlaug Crop Research Centre of Govind Ballabh Pant University of Agriculture and Technology, Pantnagar, to study effect of different integrated weed management practices on yield and economics of dry direct seeded rice in tarai region. Higher grain yield, biological yield, harvest index characters were recorded under pre emergence application of pendimethalin fb penoxsulam (PoE) fb 1HW 45 DAS at 25 cm spacing which was statistically at par with stale seed bed with shallow tillage fb application of pre-emergence application of pendimethalin fb 1 mechanical weeding (MW) with conoweeder at 25 DAS along with 1HW at 45 DAS, mulch fb penoxsulam (PoE) fb 1HW at 45 DAS, Sesbania line sowing with pre-emergence application of Pendimethalin fb 1 mechanical weeding fb 1HW at 45 DAS and stale seed bed with shallow tillage fb Sesbania line sowing fb pre-emergence pendimethalin fb brown manuring with 2,4-D at 500 g/ha fb1 HW at 45 DAS. Whereas, benefit cost ratio was found higher (2.1) under pre emergence application of pendimethalin fb penoxsulam(PoE) fb 1HW 45 DAS at 25 cm spacing which was statistically at par with stale seed bed with shallow tillage fb application of pre-emergence application of pendimethalin fb 1 mechanical weeding (MW) with conoweeder at 25 DAS along with 1HW at 45 DAS, mulch fb penoxsulam (PoE) fb 1HW at 45 DAS and Sesbania line sowing with pre-emergence application of pendimethalin fb 1 mechanical weeding fb 1HW at 45 DAS. From the study it can be concluded that above three integrated practices were same effective as recommended practice for controlling weed with higher return.