Evaluation of efficacy of different pre and post emergence herbicides for efficient weed control in green gram (Vigna radiata L.).
A field experiment was conducted during kharif of 2013-14 to find out the effect of different weed management practices in greengram. Weed spectrum of the experimental field consisted of three groups of weeds like grasses, sedges and broad leaved weeds. Grasses viz., Cynodon dactylon, Dactyloctenium aegyptium and Celotia argentia, sedges viz., Cyperus rotundus and broad leaved weeds viz., Digera arvensis, Trianthem aportulacastrum, Commelina bengalensis, Parthenium hysterophorus, Euphorbia hirta and Hemidismus indica. Weed free (hand weeding from 15 DAS at 15 days interval; 15, 30 and 45 DAS) treatment and hand weeding at 20 and 40 DAS recorded the lowest weed density, weed dry matter and the highest weed control efficiency compared to other treatments at all the stages of crop growth. Among the integrated weed treatments, application ofimazethapyr 10% SL @ 75 g ai ha-1 as pre-emergence+hand weeding at 20 DAS and pendimethalin 38.7% CS @ 580 g ai ha-1 as pre-emergence+hand weeding at 20 DAS were found effective in limiting weed growth.