National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
A field experiment was conducted during Rabi season of 2015-2016 at Agricultural College and Research Institute, Killikulam to find out the most effective weed control measure study weed dynamics, productivity and economics of hybrid maize as affected by integrated weed management. None of the pre-emergence herbicides alone provided desired control of weeds. However, inclusion of one hand weeding at 30 DAS with pre-emergence herbicides markedly improved weed control efficiency (WCE), yield attributes, grain and stover yield. Alachlor @ 1.5 kg a.i./ ha + HW at 30 DAS proved most effective in controlling weeds (WCE 90.33%) followed by two hand weedings at 15 and 30 DAS(WCE 84.08%) and they reduce the weed density and weed biomass significantly, which in turn increased yield compared with unweeded control. Significantly highest grain yield were recorded underalachlor @ 1.5 kg a.i./ ha + HW at 30 DAS (7115 kg ha-1) followed by two hand weedings at 15 and 30 DAS (6855 kg ha-1) and mechanical weeding with power weeder twice on 15 and 30 DAS(6714 kg ha-1). The highest net returns and highest benefit: cost ratio were obtained under alachlor @ 1.5 kg a.i./ ha + HW at 30 DAS followed by two hand weedings at 15 and 30 DAS.
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