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Accepted manuscript

Evaluating Weed Control in Dicamba, Glyphosate, and Glufosinate-Resistant Sugarbeet in the Western United States

Published online by Cambridge University Press:  14 January 2026

Abraham Akuoko Open the ORCID record for Abraham Akuoko [Opens in a new window] ,
Albert T. Adjesiwor Open the ORCID record for Albert T. Adjesiwor [Opens in a new window] ,
Joel Felix Open the ORCID record for Joel Felix [Opens in a new window] ,
Andrew R. Kniss Open the ORCID record for Andrew R. Kniss [Opens in a new window]  and
Nevin C. Lawrence Open the ORCID record for Nevin C. Lawrence [Opens in a new window]
Abraham Akuoko
Affiliation:
Graduate Research Assistant, Department of Agronomy and Horticulture, University of Nebraska-Lincoln, Lincoln, NE, USA
Albert T. Adjesiwor
Affiliation:
Assistant Professor, Department of Plant Sciences, University of Idaho, Kimberly, ID, USA
Joel Felix
Affiliation:
Professor, Crop and Soil Science, Oregon State University, Malheur Research Station, Ontario , OR, USA
Andrew R. Kniss
Affiliation:
Professor, Department of Plant Sciences, University of Wyoming, Laramie, WY, USA
Nevin C. Lawrence*
Affiliation:
Associate Professor, Department of Agronomy and Horticulture, University of Nebraska-Lincoln, Panhandle Research and Extension Center, Scottsbluff, NE, USA.
*
Author for correspondence: Nevin C. Lawrence, Associate Professor, Department of Agronomy and Horticulture, Panhandle Research and Extension Center, University of Nebraska-Lincoln, 4502 Ave I, Scottsbluff, NE, 69361, USA. (E-mail: nlawrence2@unl.edu)
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Abstract

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Sugarbeet with three-way resistance to dicamba, glufosinate, and glyphosate may provide sugarbeet growers with additional herbicide options for management of glyphosate-resistant (GR) weed species such as Palmer amaranth and kochia. Field trials were conducted near Scottsbluff, NE; Lingle, WY; Kimberly, ID; and Ontario, OR in 2023, to compare the effectiveness of dicamba (549 g ae ha-1) + glyphosate (1,260 g ae ha-1) applied PRE, and POST combinations of dicamba + glyphosate, glyphosate, and glufosinate (656 g ai ha-1) to manage weeds in sugarbeet. Common lambsquarters, redroot pigweed, and GR kochia were present at the WY, ID, and OR locations; and common lambsquarters and GR Palmer amaranth were present in NE. Dicamba + glyphosate applied PRE reduced common lambsquarters, redroot pigweed, and GR kochia compared to glyphosate applied alone. Common lambsquarters density was higher in glufosinate applied early POST treatment plots compared to dicamba + glyphosate and glyphosate applied alone. Glufosinate and dicamba + glyphosate applied early- or late POST reduced GR Palmer amaranth density relative to glyphosate alone applied early- or late POST. POST applications had no significant effect on redroot pigweed or GR kochia density. Based on the findings of this research, sugarbeet with three-way resistance to dicamba, glufosinate, and glyphosate will bring two additional SOA to be used both PRE and POST, providing improved weed control compared to currently available technology.

Keywords

triple-stacked sugarbeetTruvera

Information

Type
Research Article
Information
Weed Technology , Accepted manuscript , pp. 1 - 26
Creative Commons
Creative Common License - CCCreative Common License - BYCreative Common License - NCCreative Common License - ND
This is an Open Access article, distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives licence (http://creativecommons.org/licenses/by-nc-nd/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is unaltered and is properly cited. The written permission of Cambridge University Press must be obtained for commercial re-use or in order to create a derivative work.
Copyright
© The Author(s), 2026. Published by Cambridge University Press on behalf of Weed Science Society of America