Effect of different weed management practices in urdbean (Vigna mungo L.) under high rainfall and acidic soils of North East Indian hill condition

A field experiment to study the effect of different weed management practices in urdbean under acidic soils was carried out at CAU Research Farm, Imphal, Manipur during rainy seasons of 2013, 2014 and 2015. It was laid out in randomized block design with nine weed management treatments viz., pre-emergence application of pendimethalin 30 EC 1 kg a.i./ha (T₁), pendimethalin 30 EC + imazethapyr 2 EC 1 kg a.i./ha (T₂), T₁ + quizalofop-p-ethyl 75 g a.i./ha as post emergence application (T₃), T₂ + quizalofop-p-ethyl 75 g a.i./ha as post emergence application (T₄), T₁ + imazethapyr 55 g a.i./ha (T₅), T₁ + hand weeding at 30 DAS (T₆), T₂ + hand weeding at 30 DAS (T₇), and twice hand weeding at 20 and 40 DAS (T₈). The results indicated that the plots with twice hand weeding at 20 & 40 DAS had significantly lower weed population, weed dry matter and weed control efficiency followed by those where pre-emergence application of pendimethalin + imazathapyr 1 kg a.i./ha + hand weeding at 25 DAS were carried out. Significantly higher number of pods per plant, seed and stover yield, and growth attributes, like plant height and branches per plant were recorded in hand weeded plots._. It is inferred that pre-emergence application of ready-mix pendimethalin + imazethapyr 1 kg a. i. per ha + one hand weeding at 30 DAS may be recommended in controlling weeds under high rainfall North East Indian hill conditions.