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

Published online by Cambridge University Press:  20 January 2017

Lynette R. Brown*
Affiliation:
Department of Plant Agriculture, University of Guelph Ridgetown Campus, Ridgetown, Ontario, Canada N0P 2C0
Darren E. Robinson
Affiliation:
Department of Plant Agriculture, University of Guelph Ridgetown Campus, Ridgetown, Ontario, Canada N0P 2C0
Bryan G. Young
Affiliation:
Department of Plant, Soil, and Agricultural Systems, Southern Illinois University, Carbondale IL 62901
Mark M. Loux
Affiliation:
Department of Horticulture and Crop Science, Ohio State University, Columbus, OH 43210
William G. Johnson
Affiliation:
Department of Botany and Plant Pathology, Purdue University, West Lafayette, IN 47907–2054
Robert E. Nurse
Affiliation:
Agriculture and Agri-Food Canada, Harrow, Ontario, Canada N0R 1G0
Clarence J. Swanton
Affiliation:
Department of Plant Agriculture, University of Guelph, Guelph, Ontario, Canada N1G 2W1
Peter H. Sikkema
Affiliation:
Department of Plant Agriculture, University of Guelph Ridgetown Campus, Ridgetown, Ontario, Canada N0P 2C0
*
Corresponding author's E-mail: [email protected].

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.

Type
Weed Management—Major Crops
Copyright
Copyright © Weed Science Society of America 

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References

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