Weed management effect in blackgram under acidic soils of Manipur

A field experiment on effect of different weed management practices in blackgram under acidic soils of Manipur was conducted at C.A.U. research farm, Andro, Imphal East of Central Agricultural University, Manipur during Kharif season 2013, 2014 and 2015. It was laid out in randomized block design with nine different weed management treatments, viz. pre-emergence application of pendimethalin 1.0 kg/ha, pendimethalin + imazethapyr 1.0 kg/ha, pendimethalin 1.0 kg/ha + quizalofop-ethyl 75 g as post-emergence application, pendimethalin + imazethapyr 1.0 kg/ha + quizalofop-ethyl 75 g as postemergence application, pendimethalin 1.0 kg/ha + imazethapyr 55 g/ha, pendimethalin 1.0 kg/ha + hand weeding at 30 DAS, pendimethalin + imazethapyr 1.0 kg/ha + hand weeding at 30 DAS and twice hand weeding at 20 and 40 DAS. Pendimethalin1.0 kg/ha with hand weeding twice at 20 and 40 DAS recorded significant reduction in weed density, weed biomass and weed control efficiency followed by pre-emergence application of pendimethalin + imazethapyr 1.0 kg/ha, + hand weeding at 25 DAS. Significantly higher number of pods per plant, seed and stover yield and growth attributes like plant height and number of branches per plant were recorded under twice hand weeding followed by integrated treatment of pendimethalin + imazethapyr 1.0 kg/ha + hand weeding.