Indian Journal of Ecology
Year : 2021, Volume : 48, Issue : 1
First page : ( 13) Last page : ( 17)
Print ISSN : 0304-5250.

Post emergent non chemical formulations for weed management in maize

Arunjith P.*, Arthanari P. Murali

Department of Agronomy, Tamil Nadu Agricultural University, Coimbatore-641 003, India

*E-mail:arunjithp0077@gmail.com

Online published on 9 March, 2021.

Abstract

The objectives of the study were to find out the best post emergent non chemical formulations for weed management in maize. Among the weeds, itchgrass ( Rottboellia cochinchinensis ) was dominant. Lower total dry weight of weeds were at 20 days after sowing (DAS) in plots treated with vinegar 20%, followed by traditional formulation @ 10 l ha ^-1 (cow urine + lemon fruit + Terminalia chebula ).At 45 DAS, lower dry weight of weeds was observed in hand weeding twice on 20 and 45 DAS.At 20 DAS, more than 88% weed control efficiency was observed in post emergence application of vinegar 20 % and post emergence application of vinegar 20 + hand weeding on 45 DAS.Among different post emergent non-chemical formulations, higher grain yield (7214 kg ha^-1), lower weed index (1.38%) and higher returns on invest (93.29) wereobtained in post emergence application of vinegar 20% + hand weeding on 45 DAS followed by early post emergence application of traditional formulation @ 10 l ha^-1 (cow urine + lemon fruit + T. chebula ) + hand weeding on 45 DAS.

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Keywords

Maize, Non chemical formulation, Vinegar, Weed flora, Weed management.

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