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Accepted manuscript

Herbicide Strategies for Weed Control in Wisconsin Conventional Tillage Corn Production Systems

Published online by Cambridge University Press:  09 December 2024

Ahmadreza Mobli Open the ORCID record for Ahmadreza Mobli [Opens in a new window] ,
Ryan P. DeWerff Open the ORCID record for Ryan P. DeWerff [Opens in a new window] ,
Nicholas J. Arneson Open the ORCID record for Nicholas J. Arneson [Opens in a new window] ,
Daniel H. Smith  and
Rodrigo Werle Open the ORCID record for Rodrigo Werle [Opens in a new window]
Ahmadreza Mobli
Affiliation:
Scientist, University of Wisconsin-Madison, Madison, WI, USA
Ryan P. DeWerff
Affiliation:
Research Specialist, University of Wisconsin-Madison, Madison, WI, USA
Nicholas J. Arneson
Affiliation:
Former Outreach Program Manager, University of Wisconsin-Madison, Madison, WI, USA
Daniel H. Smith
Affiliation:
Southwest Regional Agronomist, Nutrient and Pest Management Program, University of Wisconsin, Madison, WI, USA
Rodrigo Werle*
Affiliation:
Associate Professor, University of Wisconsin–Madison, Madison, WI, USA.
*
Author for correspondence: Rodrigo Werle, Department of Plant and Agroecosystem Sciences, University of Wisconsin–Madison, Madison, WI 53706. Email: [email protected]
Rights & Permissions [Opens in a new window]

Abstract

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Selection of effective herbicide strategies (i.e., one- versus two-pass and timing [preemergence (PRE) versus postemergence (POST)]) is of great importance to corn growers. Field studies were conducted at Arlington (2018 and 2019), Brooklyn (2019), Lancaster (2019), and Janesville (2018 and 2019), Wisconsin (six site-years) to evaluate overall end-of-season weed control efficacy of multiple herbicide strategies in conventional tillage corn production systems. Herbicide strategy treatments included one-pass PRE, one-pass POST, two-pass PRE followed by (fb) POST, and two-pass PRE fb POST with layered residual herbicides (LRPOST). The weed species present at the experimental site-years were common lambsquarters, giant foxtail, giant ragweed, velvetleaf, and/or waterhemp. Except Arlington-2019, the herbicide strategy was not as influential for the site-years infested with common lambsquarters, giant foxtail, velvetleaf, and/or waterhemp species (e.g., Arlington 2018, Brooklyn 2019, Lancaster 2019), as effective overall end-of-season control (>90%) was achieved regardless of the herbicide strategy, and no significant differences were observed in the combined weed biomass across strategies. A two-pass strategy (e.g., PRE followed by POST, or PRE followed by LRPOST) was necessary for effective overall end-of-season control at the site-years infested with giant ragweed (Janesville 2018 and 2019). Weed interference reduced corn yield by 11 to 75% across site-years. Although certain weed communities can be effectively controlled by a one-pass herbicide strategy, two-pass strategies provided the greatest and most consistent overall end-of-season weed control and corn yield across all site-years, regardless of weed species composition and environmental conditions. Hence, a two-pass herbicide strategy is recommended for Wisconsin conventional tillage corn production to ensure effective end-of-season weed control while protecting yield potential of the crop, particularly in fields infested with moderate to high density of troublesome weeds such as giant ragweed.

Keywords

Chemical weed managementherbicide efficacypostemergence herbicidepreemergence herbicidetwo-pass herbicide program
Type
Research Article
Information
Weed Technology , Accepted manuscript , pp. 1 - 23
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
© Weed Science Society of America, 2024