Herbicide combinations for weed management in Urdbean (Vigna mungo) under tarai condition of Uttarakhand

A field experiment was conducted during kharif 2015 at N. E. Borlaug Crop Research Centre of Govind Ballabh Pant University of Agriculture and Technology, Pantnagar (Uttarakhand) to evaluate the sequential and mixture effects of the herbicides pendimethalin, imazethapyr and quizalofop along with manual weeding (MW) on weed dynamics, weed management and crop performance of urdbean (Vigna mungo) grown under tarai condition. Echinochloa colona, Cyperus rotundus and Trianthema monogyna were the dominant weeds with percent composition of 30, 29 and 18.5 per cent respectively at 45 DAS. Significantly superior weed control at 45 days after sowing (DAS), in terms of lower weed density, weed dry weight and higher weed control efficiency was obtained under two MW at 20 and 40 DAS (4.5 per m2, 2.5 g/m2 and 97% respectively) which was at par with pendimethalin + imazethapyr (ready mix) 1.0 kg/ha + MW at 30 DAS, pendimethalin 1.0 kg/ha + MW at 30 DAS and pendimethalin 1.0 kg/ha + imazethapyr 55g/ha. Significantly higher grain yield (1164 kg/ha) and protein content (22.13 %) was achieved under two MW at 20 and 40 DAS.