Hostname: page-component-cd9895bd7-p9bg8 Total loading time: 0 Render date: 2024-12-26T06:40:13.889Z Has data issue: false hasContentIssue false
  • English
  • Français
Accepted manuscript

Performance of a Diflufenican-Containing Premixture in Dicamba-Resistant Soybean Systems

Published online by Cambridge University Press:  15 November 2024

Matthew C. Woolard Open the ORCID record for Matthew C. Woolard [Opens in a new window] ,
Jason K. Norsworthy Open the ORCID record for Jason K. Norsworthy [Opens in a new window] ,
Trenton L. Roberts Open the ORCID record for Trenton L. Roberts [Opens in a new window] ,
L. Tom Barber ,
Benjamin C Thrash Open the ORCID record for Benjamin C Thrash [Opens in a new window] ,
Christy L. Sprague Open the ORCID record for Christy L. Sprague [Opens in a new window]  and
Amar S. Godar Open the ORCID record for Amar S. Godar [Opens in a new window]
Matthew C. Woolard*
Affiliation:
Graduate Research Assistant, Department of Crop, Soil, and Environmental Sciences. University of Arkansas, Fayetteville, AR, USA
Jason K. Norsworthy
Affiliation:
Distinguished Professor, Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR, USA
Trenton L. Roberts
Affiliation:
Professor, Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR, USA
L. Tom Barber
Affiliation:
Professor, Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Lonoke, AR, USA
Benjamin C Thrash
Affiliation:
Assistant Professor, Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Lonoke, AR, USA
Christy L. Sprague
Affiliation:
Professor, Department of Plant, Soil, and Microbial Sciences, Michigan State University, East Lansing, MI, USA
Amar S. Godar
Affiliation:
Post Doctoral Fellow, Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR, USA
*
Author for correspondence: Matthew C Woolard; mawoolar@ttu.edu
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

Weeds belonging to the Amaranthus family are most problematic for soybean producers. With Palmer amaranth evolving resistance to multiple herbicides labeled for use in soybean, producers seek new sites of action to integrate into season-long herbicide programs. Bayer CropScience plans to launch a Convintro™ brand of herbicides, one being a premixture that will include diflufenican (WSSA Group 12), metribuzin (WSSA Group 5), and flufenacet (WSSA Group 15), for use preemergence (PRE) in soybean. Research trials were conducted in Fayetteville and Keiser, AR, and Holt, MI, in 2022 and 2023 to evaluate the premixture in a season-long program in a dicamba-resistant soybean system. A 0.17:0.35:0.48 of the diflufenican:metribuzin:flufenacet (DFF-containing) premixture was applied PRE with different combinations of glyphosate, glufosinate, dicamba, and acetochlor at 28 [early-postemergence (EPOST)] and 42 [late-postemergence (LPOST)] days after planting (DAP). At the EPOST timing, the DFF-containing premixture provided >90% Palmer amaranth and prickly sida control. However, common ragweed, common lambsquarters, morningglory ssp., and annual grass control was ≤80% at this timing. When the LPOST applications occurred, treatments that had already received an EPOST application controlled prickly sida, morningglory ssp., Palmer amaranth, and annual grasses greater than those that had not, indicating the PRE application of the DFF-containing premixture was not sufficient to provide control of the weed spectrum through 42 days after planting. By 70 days after planting, all programs provided ≥93% control of all weeds evaluated. Herbicide programs that utilized the DFF-containing premixture PRE fb EPOST fb LPOST controlled common ragweed, common lambsquarters, morningglory ssp., and annual grasses greater than the one pass postemergence systems. In addition, all herbicide programs evaluated reduced Palmer amaranth seed production by >99%. However, producers that plan to utilize the DFF-containing premixture may need two postemergence herbicide applications to obtain high levels of weed control throughout the growing season.

Keywords

Convintrogroup 12weed controlpreemergencepostemergence
Type
Research Article
Information
Weed Technology , Accepted manuscript , pp. 1 - 30
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