Effect of Post Emergence Application of Glyphosate on Weed Control and Yield of Herbicide Tolerant Transgenic Stacked Maize Hybrids
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Author:D. Ravisankar, P. Muthukrishnan and C. Chinnusamy
p-ISSN:0024-9602, e-ISSN:2582-5321, Vol:99, Issue:oct-dec
DOI: https://doi.org/10.29321/MAJ.10.100192
Abstract
Field experiments were conducted during kharif 2009 and rabi 2009-10 at Tamil Nadu Agricultural
University, Coimbatore to evaluate the weed control efficiency of various weed management
practices and yield of transgenic stacked maize hybrids. Treatments consisted of two
transgenic hybrids named Hishell and 900 M Gold applied with glyphosate as early post
emergence application (POE) at 900, 1800 and 3600 g a.e ha -1 compared with non-transgenic
counterpart maize hybrids applied with pre-emergence (PE) atrazine at 0.5 kg ha -1 followed by
one hand weeding (HW) on 40 DAS and with and without insect management. Among the
treatments higher weed control efficiency was achieved by POE application of glyphosate at
900, 1800 and 3600 g a.e ha -1 and higher grain yield was recorded with POE application of
glyphosate at 1800 g a.e ha -1 in transgenic 900 M Gold and 3600 g a.e ha -1 in transgenic Hishell
during kharif 2009 and rabi 2009-10 seasons, respectively.
Key words : Herbicide tolerant, Transgenic maize, Glyphosate, Weed control efficiency, Yield