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Accepted manuscript

Postemergence giant ragweed management as affected by soil and cover crop management, soybean planting time, and preemergence herbicide application

Published online by Cambridge University Press:  13 January 2025

Guilherme Chudzik Open the ORCID record for Guilherme Chudzik [Opens in a new window] ,
Jose J. Nunes Open the ORCID record for Jose J. Nunes [Opens in a new window] ,
Nicholas J. Arneson Open the ORCID record for Nicholas J. Arneson [Opens in a new window] ,
Ryan P. DeWerff Open the ORCID record for Ryan P. DeWerff [Opens in a new window] ,
Victor de Sousa Ferreira Open the ORCID record for Victor de Sousa Ferreira [Opens in a new window] ,
Christopher Proctor Open the ORCID record for Christopher Proctor [Opens in a new window] ,
David E. Stoltenberg Open the ORCID record for David E. Stoltenberg [Opens in a new window] ,
Shawn Conley Open the ORCID record for Shawn Conley [Opens in a new window]  and
Rodrigo Werle Open the ORCID record for Rodrigo Werle [Opens in a new window]
Guilherme Chudzik
Affiliation:
Graduate Student, Department of Plant and Agroecosystem Sciences, University of Wisconsin-Madison, Madison, WI, USA
Jose J. Nunes
Affiliation:
Graduate Student, Department of Plant and Agroecosystem Sciences, University of Wisconsin-Madison, Madison, WI, USA
Nicholas J. Arneson
Affiliation:
Outreach Program Manager, Department of Plant and Agroecosystem Sciences, University of Wisconsin-Madison, Madison, WI, USA
Ryan P. DeWerff
Affiliation:
Research Specialist, Department of Plant and Agroecosystem Sciences, University of Wisconsin-Madison, Madison, WI, USA
Victor de Sousa Ferreira
Affiliation:
Graduate Student, Department of Agronomy and Horticulture, University of Nebraska, Lincoln, NE, USA
Christopher Proctor
Affiliation:
Associate Professor, Department of Agronomy and Horticulture, University of Nebraska, Lincoln, NE, USA
David E. Stoltenberg
Affiliation:
Professor, Department of Plant and Agroecosystem Sciences, University of Wisconsin, Madison, WI, USA
Shawn Conley
Affiliation:
Professor, Department of Plant and Agroecosystem Sciences, University of Wisconsin-Madison, Madison, WI, USA
Rodrigo Werle*
Affiliation:
Associate Professor, Department of Plant and Agroecosystem Sciences, University of Wisconsin-Madison, Madison, WI, USA
*
Author for correspondence: Rodrigo Werle, Associate Professor, University of Wisconsin-Madison, 1575 Linden Dr., Madison, WI, 53706. (E-mail: rwerle@wisc.edu)
Rights & Permissions [Opens in a new window]

Abstract

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Early soybean planting and cover crop adoption in the US Midwest prompt investigation into the impact of these practices on weed community dynamics and best management practices. While previous research has explored different aspects of giant ragweed control, the specific integration among soil management practices, including cover crop adoption, soybean planting timing, and herbicide use, has not been thoroughly investigated. This study assessed soil management, soybean planting time, and PRE herbicide application on giant ragweed control and soybean yield in Wisconsin and Nebraska in 2022 and 2023. The study included a factorial arrangement of four soil management treatments [conventional tillage, no-till, and fall-planted cereal rye early terminated and terminated at planting (planting green)]; two soybean planting times; and two PRE herbicide treatments (PRE and no PRE). Postemergence (POST) herbicides were applied when ∼50% of giant ragweed plants within each treatment reached ∼10 cm in height. In Nebraska, cereal rye and tillage treatments without a PRE had at least 67% lower giant ragweed density than no-till at POST. In no-till, densities were at least 60% lower with PRE compared to no PRE. In Wisconsin, cereal rye did not reduce giant ragweed density at POST compared to no-till, likely due to relatively low biomass accumulation. In contrast, delayed soybean planting reduced giant ragweed density for most treatments but lowered soybean yield in no-till and planting green treatments. The PRE herbicides had either no or positive effects on reducing giant ragweed density and increasing soybean yield. Overall, this study suggests that soil management and soybean planting timing are crucial for effective giant ragweed management in Wisconsin, where biotypes with a long emergence window during the spring and summer are present, while in Nebraska, soil management and soybean planting timing are less critical due to giant ragweed biotypes with an early and short emergence window in the spring.

Keywords

Cereal ryecover cropintegrated weed managementplanting greenplanting timetillage
Type
Research Article
Information
Weed Technology , Accepted manuscript , pp. 1 - 25
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), 2025. Published by Cambridge University Press on behalf of Weed Science Society of America