Vol. 12, Issue 5 (2023)

Author(s):
Yamini Siwna, Jitendra Trivedi, Praveen Gupta and P Mahesh

Abstract:
A field investigation entitled “Effect of Herbicides and their Combination on Weed Management in Onion (Allium cepa L.)” carried out during 2020-21 and 2021-22 at Horticultural Research cum Instructional Farm, Indira Gandhi Krishi Vishwavidyalaya, Raipur (C.G.) with an objective to study the weed dynamics and efficacy of different herbicide and their combination on weed management in onion. The experiment was laid out in Randomized Block Design with ten treatments replicated thrice. Five herbicides, namely Oxyfluorefen, Oxdiargyl, Pendimethalin, Fluazifop-p-butyl, and Quizalofop-p-ethyl combinations and hand weeding were compared with weedy check (untreated) plot. The herbicide treatment (T₇) Oxyfluorfen 23.5% @ 0.25 kg a.i./ha + Quizalofop-p-ethyl 5% EC @ 75 g a.i./ha + Pendimethalin 30% EC @ 1kg a.i./ha + hand weeding at 40 days after transplanting found significantly superior than control plot and recorded minimum weed density (6.47/m²) at stages of crop growth, weed intensity (14.13%), weed dry biomass (16.40 g/m²) and weed index (0.00%). Similarly, the same herbicide treatment registered the maximum weed control efficiency (88.86%), Herbicide efficiency index (3.99%), which were noticed in the same herbicide treatment. This clearly indicates that the application of Oxyfluorfen 23.5% @ 0.25 kg a.i./ha + Quizalofop-p-ethyl 5% EC @ 75 g a.i./ha + Pendimethalin 30% EC @ 1kg a.i./ha + hand weeding at 40 days after transplanting found effective herbicide to controlling weeds in onion cultivation.