Influence of Post Emergence Application of Glyphosate on Weed Control Efficiency and Yield of Transgenic Maize
- 1 Department of Agronomy, Tamil Nadu Agricultural University, Coimbatore, India.
- 2 Department of Agronomy, Tamil Nadu Agricultural University, Coimbatore, India.
- 3 Department of Agronomy, Tamil Nadu Agricultural University, Coimbatore, India
Abstract
Field experiment was conducted during kharif 2009 and rabi 2009- 20 10 at Tamil Nadu Agricultural University, Coim batore to evaluate the weed control efficiency and yield potential of glyphosate resistant transgenic maize. Treatments consisted of two transgenic maize hybrids named Hishell and 900 M gold with application of glyphosate as post emer gence at 900, 1800 and 3600 g a.e/hathese were compared with non-transgenic counterpart maize hybrids with applica tion of atrazine as pre-emergence at 0.5 kg /ha followed by one hand weeding at 40 Days After Sowing along with need based insect control practices. Post emergence application of glyphosate at 900, 1800 and 3600 g a.e/ha in transgenic maize hybrids was recorded with lower weed density and higher weed control efficiency compared to other treatments. Higher grain yield was recorded with post emergence application of glyphosate at 1800 g a.e/ha in transgenic hybrid 900 M Gold and 3600 g a.e/ha in transgenic hybrid Hishell during kharif 2009 and rabi 2009- 20 10 seasons, respec tively.
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