Efficacy of post-emergence herbicides in managing weeds in transplanted finger millet and their residual effect on succeeding greengram

A field experiment was conducted during Rabi, 2024–25 at Wetland Farm, S.V. Agricultural College, Tirupati campus of Acharya N. G. Ranga Agricultural University, Andhra Pradesh, India to identify suitable post-emergence herbicide for managing weeds and enhancing productivity and profitability of transplanted finger millet and to assess the residual effect of herbicides on succeeding greengram. The experiment was laid out in a randomized block design (RBD) with three replications and ten weed management treatments. Hand weeding (HW) twice at 15 and 30 days after transplanting (DAT) recorded the lowest weed density, biomass at harvest with higher weed control efficiency, greengram growth parameters and yield. It was comparable with post-emergence (PoE) application of penoxsulam 20 g/ha. The next best treatment was 2,4-D sodium salt 800 g/ha PoE, which was par with, triafamone + ethoxysulfuron 30 g/ha PoE. Higher benefit cost ratio was obtained with penoxsulam 20 g/ha PoE, which was at par with, 2,4-D sodium salt 800 g/ha PoE. None of the tested early or post-emergence herbicides exhibited residual or inhibitory effect on succeeding greengram crop.