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Accepted manuscript

Control of dicamba/glufosinate/glyphosate-resistant volunteer soybean in corn with preemergence and postemergence herbicides

Published online by Cambridge University Press:  22 December 2024

Mandeep Singh  and
Amit J. Jhala Open the ORCID record for Amit J. Jhala [Opens in a new window]
Mandeep Singh
Affiliation:
Post-doctoral Research Associate, Department of Agronomy and Horticulture, University of Nebraska−Lincoln, Lincoln, NE, USA
Amit J. Jhala*
Affiliation:
Professor & Associate Department Head, Department of Agronomy and Horticulture, University of Nebraska‒Lincoln, Lincoln, NE, USA
*
Corresponding author: Amit J. Jhala; Email; [email protected]
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Abstract

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The widespread adoption of multiple herbicide-resistant corn and soybean often causes the problem of volunteers in corn-soybean rotation, which necessitates alternative herbicides for effective management. The objective of this research was to evaluate preemergence (PRE) and postemergence (POST) herbicides labelled in corn for control of dicamba/glufosinate/glyphosate-resistant volunteer soybean. Field experiments were conducted from 2021 to 2023 near Clay Center, Nebraska. Two separate field experiments were conducted to evaluate 12 PRE and 14 POST herbicides to control volunteer soybean in Enlist corn. Soybean resistant to dicamba/glufosinate/glyphosate was planted perpendicular to corn rows to mimic volunteer soybean. Among PRE herbicides tested, acetochlor/clopyralid/flumetsulam (1,190; 1,050/106/34 g ai ha–1) and acetochlor/clopyralid/mesotrione (2,304; 1,961/133/210 g ai/ae ha–1) provided 97% and 99% control of volunteer soybean, respectively, in 2021, and 68% and 89% control, respectively, in 2023 at 42 d after PRE. Among POST herbicides tested, 2,4-D choline (1,064 g ae ha–1), acetochlor/clopyralid/mesotrione (2,304; 1,961/133/210 g ai/ae ha–1), atrazine/bicyclopyrone/mesotrione/S-metolachlor (2,409; 700/42/168/1,499 g ai ha–1), clopyralid/flumetsulam (192; 146/46 g ai ha–1), nicosulfuron + atrazine (34 + 1,120 g ai ha–1), and thiencarbazone-methyl/tembotrione + atrazine (76; 12/63 + 896 g ai ha–1) provided ≥ 97% volunteer soybean control, ≥ 94% density reduction, and ≥ 97% biomass reduction 28 d after POST herbicide application. Corn yield did not differ from the weed-free control in these treatments. The results of this study suggest that PRE and POST herbicides are available for control of dicamba/glufosinate/glyphosate-resistant volunteer soybean in Enlist corn, and careful selection of herbicide is required based on the herbicide-resistant soybean planted previous year.

Keywords

Crop volunteersdicamba-resistant soybeanEnlist cornherbicide-resistantvolunteer soybean
Type
Research Article
Information
Weed Technology , Accepted manuscript , pp. 1 - 24
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), 2024. Published by Cambridge University Press on behalf of Weed Science Society of America