Weed management in transplanted onion (Allium cepa L.) through early post-emergence herbicides.
A field experiment was conducted to evaluate different weed management practices in onion during rabi 2016-17 to 2017-18 at the Agricultural Farm, PalliSiksha Bhavana, Visva-Bharati, Sriniketan, West Bengal. Theexperiment was laid out in randomized block design having eleven treatments with three replications. The pooled results revealed that highest bulb yield (22.07 t ha-1) was obtained from weed free treatment over the remaining treatments. Among herbicidal treatments, oxyfluorfen 20% DF at 3000 g ha-1 recorded significantly highest bulb yield (21.85 t ha-1) than oxyfluorfen 23.5% EC (850 ml ha-1), propaquizafop 10% EC (625 ml ha-1) and pendimethalin 38.7% EC (1750 ml ha-1). However, bulb yield produced through the treatment oxyfluorfen 20% DF at 3000 g ha-1 was at par with other doses of oxyfluorfen 20% DF at 2000, 1000 and 750 g ha-1. Among herbicidal treatments the weed control efficiency was highest in oxyfluorfen 20% DF at 3000 g ha-1 than the rest of the treatments. Highest B:C ratio (1.638) was obtained with oxyfluorfen 20% DF at 1000 g ha-1 but it was very close to oxyfluorfen 20% DF at 750 g ha-1 (1.626). Yield loss due to weeds was to the extent of 30.68%.