Influence of Post Emergence Application of Glyphosate on Weed Control Efficiency and Yield of Transgenic Maize

Duraisamy Ravisankar, Chinnagoundar Chinnusamy, Purushothaman Muthukrishnan

Department of Agronomy, Tamil Nadu Agricultural University, Coimbatore, India.
Department of Agronomy, Tamil Nadu Agricultural University, Coimbatore, India..

DOI: 10.4236/ajps.2013.48188                

Abstract

Field experiment was conducted during kharif 2009 and rabi 2009-2010 at Tamil Nadu Agricultural University, Coimbatore 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 emergence at 900, 1800 and 3600 g a.e/hathese were compared with non-transgenic counterpart maize hybrids with application 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 2009-2010 seasons, respectively.

Keywords

Glyphosate Tolerant Maize; Weed Control Efficiency; Yield

Conflicts of Interest

The authors declare no conflicts of interest.

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