Vol. 12, Issue 2 (2023)

Author(s):
Oscar Toppo and ML Kewat

Abstract:
A field experiment was conducted during the Kharif season of 2019 and 2020 at Zonal Agricultural Research station Powarkheda, Narmadapuram, JNKVV Jabalpur, to find out the most effective weed control method and sowing time for direct-seeded rice. The density (8.10 m^-2) and dry weight (9.05 gm^-2) of total weeds, plant height (58.82 cm), number of tillers (75.00 m^-1 row length), plant dry weight (226.00 g m^-2) and grain yield (3.6 t/ha)was maximum in case of 20^th June sowing over delayed sowing done on 5^th and 20^th July. Among all herbicidal treatment, Bispyribac sodium 25 g a.i. ha^-1 was found significantly superior in reducing total weed density (6.17 m^-2) and total weed dry weight (8.38 g m^-2) and recorded the maximum weed control efficiency (69.89%).Similarly, the Bispyribac sodium 25 g a.i. ha^-1 as post-emergence recorded significantly higher plant height, (62.71cm) number of tillers (85.76 m^-1 row length), plant dry weight (242.00 g m^-2) and grain yield (3416 kg ha^-1) over rest of the treatments but found at par with two hand weeding.