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1 March 2017 Tolerance of Corn with Glyphosate Resistance and the Aryloxyalkanoate Dioxygenase Trait (AAD-1) to 2,4-D Choline and Glyphosate
David C. Ruen, Eric F. Scherder, Scott C. Ditmarsen, Patricia L. Prasifka, Jeffrey M. Ellis, David M. Simpson, Courtney A. Gallup, Bradley W. Hopkins
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Abstract

In 2011, 14 Midwest trial locations evaluated tolerance of an AAD-1 and glyphosate-resistant corn hybrid to a 2,4-D choline glyphosate premix formulation applied single and sequential POST at V4 and/or V7 corn with and without a PRE application of 2,4-D dimethylamine (DMA). Herbicides were applied at 1X and 2X maximum use rates with 1X rates of 1120 g ae ha-1 for glyphosate and 2,4-D DMA and 1065 1120 g ae ha-1 for the 2,4-D choline glyphosate premix, respectively. Crop response was greatest 2 d after 2X rate applications, resulting in 4 to 10% visible injury to corn across application timings. No brace root injury or effect on corn grain yield were observed.

Nomenclature: Corn, Zea mays L.

© Weed Science Society of America, 2017
David C. Ruen, Eric F. Scherder, Scott C. Ditmarsen, Patricia L. Prasifka, Jeffrey M. Ellis, David M. Simpson, Courtney A. Gallup, and Bradley W. Hopkins "Tolerance of Corn with Glyphosate Resistance and the Aryloxyalkanoate Dioxygenase Trait (AAD-1) to 2,4-D Choline and Glyphosate," Weed Technology 31(2), 217-224, (1 March 2017). https://doi.org/10.1017/wet.2016.20
Received: 6 June 2016; Accepted: 1 October 2016; Published: 1 March 2017
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