Vol. 12, Issue 3 (2023)

Author(s):
R Easwari, M Saravana Perumal, K Suseendran and B Ananda Ganesa Raja

Abstract:
Field experiment was conducted at the Vadapalai village, Villupuram district during July-September, 2021 to evaluate the performance of different pre and post emergence herbicides on weeds and productivity of greengram under irrigated conditions. Weed spectrum of the experimental field consisted of three groups of weeds like grasses, sedges and broad-leaved weeds. The grass weeds were Cyanodon dactylon, Echinochloa colona, Dactyloctenium aegyptium and the major sedge was Cyperus rotundus. Among the broad-leaved weeds Cleome viscosa, Trianthema portulacastrum and Phyllanthus niruri were found. Application of Pendimethalin @ 1 kg a.i. ha^-1 on 3 DAS + Imazethapyr @ 70 g a.i. ha^-1 on 20 DAS registered the maximum growth of irrigated greengram due to reduced weed growth, weed dry matter production and reduction in nutrient depletion by weeds and increased nutrient uptake by crop and this was on par with Hand weeding twice at 15 and 30 DAS.