Year: 2021
Type: article
Abstract: Field experiments were conducted during Kharif 2018 to evolve a suitable weed management practices for irrigated hybrid maize.The experiments were laid out in randomized block design, replicated thrice with fifteen treatments viz., T 1 -Atrazine @0.25 kg a.i /ha as pre-emergence + hand weeding on 30 DAS, T 2 -Pendimethalin @0.75 kg a.i/ha as preemergence + hand weeding on 30 DAS, T 3 -Alachlor @ 0.2kg a.i/ha as pre-emergence + hand weeding on 30 DAS, T 4 -Atrazine @0.25 kg a.i /ha as pre-emergence + early post emergence tembotrione 100g ha -1 on 21 DAS, T 5 -Pendimethalin @0.75 kg a.i/ha pre-emergence + early post emergence tembotrione 100g ha -1 on 21 DAS, T 6 -Alachlor @ 0.2 kg a.i/ha as pre-emergence + early post emergence tembotrione 100g ha -1 on 21 DAS, T 7 -Atrazine @0.25 kg a.i /ha as pre-emergence + twin wheel hoe weeding on 30 DAS, T 8 -Pendimethalin @0.75 kg a.i/ha preemergence + twin wheel hoe weeding on 30 DAS, T 9 -Alachlor @ 0.2 kg a.i/ha pre-emergence + twin wheel hoe weeding on 30 DAS, T 10 -Maize + cowpea without weeding, T 11 -Maize + cowpea + hand weeding on 30 DAS, T12-Maize+cowpea + pendimethalin @0.75 kg a.i/ha as pre-emergence, T 13 -Hand weeding on 15 and 30 DAS, T 14 -Weed free, T 15 -Weedy check.From the results, its concluded that atrazine @ 1.5 kg a.i / ha + twin wheel hoe at 30 DAS proved most effective in controlling weeds followed by alachlor @ 0.2 kg a.i/ha pre-emergence +twin wheel hoe on 30 DAS and they reduce the weed density and increased weed control efficiency significantly, which in turn increased yield compared with unweeded control.Significantly highest grain yield were recorded under atrazine @ 1.5 kg a.i / ha + twin wheel hoe at 30 DAS followed by alachlor @ 0.2 kg a.i/ha as pre-emergence + twin wheel hoe on 21 DAS.The highest net returns and highest benefit: cost ratio were obtained under atrazine @ 1.5 kg a.i / ha + twin wheel hoe on 30 DAS followed by alachlor @ 0.2 kg a.i/ha pre-emergence + twin wheel hoe on 30 DAS.
Source: PLANT ARCHIVES
Authors: Punithavathi M., S. Sundari, K. Wahab
Institutions: Indian Council of Agricultural Research, Annamalai University
Language: English
Subfield: Plant Science
Domain: Life Sciences
SDG: Zero hunger
Open Access status: bronze
OpenAlex ID: W3153901967