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Response of Corn to Simulated Glyphosate Drift Followed by In-Crop Herbicides

  • Lynette R. Brown (a1), Darren E. Robinson (a1), Bryan G. Young (a2), Mark M. Loux (a3), William G. Johnson (a4), Robert E. Nurse (a5), Clarence J. Swanton (a6) and Peter H. Sikkema (a1)...

Abstract

Thirteen field experiments were conducted in Illinois, Indiana, Ohio, and Ontario from 2005 to 2007 to determine the effects of simulated glyphosate drift followed by in-crop applications of nicosulfuron/rimsulfuron plus dicamba/diflufenzopyr or foramsulfuron plus bromoxynil plus atrazine on nontransgenic corn injury, height, stand count, shoot dry weight, and yield. Simulated glyphosate drift at 100 and 200 g/ha, resulted in 11 to 61% visual crop injury and a 19 to 45% decrease in corn height. Simulated glyphosate drift at 200 g/ha caused a reduction in shoot dry weight by 46%, stand count by 28% and yield by 49 to 56%. Generally, simulated glyphosate drift followed by the in-crop herbicides resulted in an additive response with respect to visual crop injury, height, stand count, shoot dry weight, and yield.

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Corresponding author

Corresponding author's E-mail: lbrown@ridgetownc.uoguelph.ca.

References

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