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Sodium Safens Saflufenacil Applied Postemergence to Corn (Zea mays)

Published online by Cambridge University Press:  20 January 2017

Meghan Moran ,
Peter H. Sikkema ,
J. Christopher Hall  and
Clarence J. Swanton
Meghan Moran
Affiliation:
Plant Agriculture Department, University of Guelph, Guelph, ON, Canada N1G 2W1
Peter H. Sikkema
Affiliation:
Department of Environmental Biology, University of Guelph, Guelph, ON, Canada N1G 2W1
J. Christopher Hall
Affiliation:
Ridgetown College, University of Guelph, Ridgetown, ON, Canada N0P 2C0
Clarence J. Swanton*
Affiliation:
Plant Agriculture Department, University of Guelph, Guelph, ON, Canada N1G 2W1
*
Corresponding author's E-mail: [email protected].
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Abstract

Saflufenacil is a PRE herbicide for the control of broadleaf weeds. Field and growth room studies were conducted to explore the tolerance of corn to POST treatments of saflufenacil and BAS 781. Additionally, the potential use of sodium as a safener for saflufenacil was evaluated. Crop injury caused by saflufenacil or BAS 781 was 8 and 38%, respectively, when applied at twice the recommended dose at the spike to two-leaf stage of crop growth. This injury increased to 28 and 65%, respectively, when applied at the three- to four-leaf stage. This level of crop injury resulted in yield loss, particularly when applied at the three- to four-leaf stage. The addition of Na-bentazon to saflufenacil reduced this injury and increased crop dry weight under both field and laboratory conditions. In the field, Na-bentazon also increased corn collar height and yield compared with saflufenacil applied alone. Na-bentazon reduced injury through a reduction in foliar uptake of saflufenacil. Sodium derived from baking soda also provided a safening effect, but only at the lowest dose of saflufenacil tested.

Keywords

BAS 781, saflufenacil plus dimethenamid-Pbaking soda, NaHCO3corn, Zea mays LBentazonBAS 781dimethenamid-Pbaking sodaherbicide safenercrop tolerance
Type
Physiology, Chemistry, and Biochemistry
Information
Weed Science , Volume 59 , Issue 1 , March 2011 , pp. 4 - 13
Copyright
Copyright © Weed Science Society of America 

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