Influence of Post Emergence Application of  Glyphosate on Weed Control and Nutrient Uptake of  Transgenic Maize

D. Ravisankar; C.Chinnusamy and P.Muthukrishnan

Volume : III, Issue : VI, June - 2013

Influence of Post Emergence Application of Glyphosate on Weed Control and Nutrient Uptake of Transgenic Maize

D. Ravisankar, C. Chinnusamy And P. Muthukrishnan

Abstract :

The research experiment was conducted with herbicide resistant transgenic maize during kharif2009 and rabi 2009–10 at Tamil Nadu Agricultural University, Coimbatore, with the treatments consisted of two transgenic maize hyids named Hishell and 900 M gold with application of glyphosate as post emergence @ 900, 1800 and 3600 g a.e ha–1 these were compared with non–transgenic counterpart maize hyids with application of atrazine as pre–emergence @ 0.5 kg ha–1 followed by one hand weeding at 40 DAS and unweeded control. The total density of weeds were significantly reduced with post emergence 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. Similarly, higher nutrient uptake by maize and yield were achieved by post emergence application of glyphosate at different level of doses.