1Senior Scientist, Regional Research and Technology Transfer Station, Chiplima, Odisha, 768 025
2Associate Director of Research, Regional Research and Technology Transfer Station, Chiplima, Odisha, 768 025
Regional Research and Technology Transfer Station, Orissa University of Agriculture and Technology, Chiplima, Odisha, 768 025
*Corresponding author's Email: santanu_kt@yahoo.co.in
Online published on 25 October, 2019.
A field experiment was conducted during the winter (rabi) seasons of 2014–15 and 2015–16 to study the effect of sole and sequential application of different herbicides on weed control in onion (Allium cepa L.). Sequential application of pendimethalin @ 750 g/ha at 3 days after transplanting (DAT) + oxyfluorfen @ 100 g/ha at 20 DAT controlled the grasses, sedges and broad-leaf weeds most efficiently and was at par with oxadiargyl @ 90 g/ha at 3 DAT + oxyfluorfen @ 100 g/ha at 20 DAT. Weed competition resulted in about 54.8% yield loss of onion in weedy check plot. The lowest values of total weed density (18.6/m 2), dry weight (6.8 g/m 2), weed index (6.2%) and the highest values of weed control efficiency (89.2%), bulb yield (21.89 t/ha) and benefit: cost ratio (2.84) were registered with sequential application of pendimethalin @ 750 g/ha at 3 DAT + oxyfluorfen @ 100 g/ha at 20 DAT. In weedy check, weeds removed 23.9 kg N, 3.8 kg P and 27.6 kg K/ha.
Onion, Oxadiargyl, Oxyfluorfen, Pendimethalin, Quizalofop ethyl, Sole application, Sequential application, Weed-control efficiency
