2021
Research and Extension Support for Management of Herbicide-Resistant Weeds
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Contributor/Checkoff:
Tennessee Soybean Promotion Board
Category:
Sustainable Production
Keywords:
DiseaseField management Pest
Parent Project:
Research and Extension Support for Management of Glyphosate-Resistant Weeds
Lead Principal Investigator:
Larry Steckel, University of Tennessee-Institute of Agriculture
Co-Principal Investigators:
Project Code:
Contributing Organization (Checkoff):
Tennessee Soybean Promotion Board
$50,000
Institution Funded:
University of Tennessee-Institute of Agriculture
$50,000
Brief Project Summary:
This project continues small plot research on herbicide-resistant weeds, including Palmer amaranth, horseweed (marestail), and the emerging problems of herbicide-resistant grassy weeds, including goosegrass, ryegrass, johnsongrass and barnyardgrass. The research assesses the best programs to control these troublesome weeds, using combinations of tillage, cover crops and herbicides with multiple modes of action. It also investigates the interaction of different traits and herbicides. At the same time, the project examines weed control failures on arms and elucidates if due to true herbicide resistance or some other factor. Efforts also consider if herbicide tolerance is developing to glufosinate, dicamba or 2,4-D.
Key Beneficiaries:
#agronomists, #extension agents, #farmers
Unique Keywords:
#agronomy, #herbicides, #weed control, #weed resistance, #weeds
Information And Results
Project Summary

Objective 1. We propose to continue small plot research on herbicide-resistant weeds, including Palmer Pigweed, horseweed (marestail), and the emerging problems of herbicide-resistant grassy weeds, including goosegrass, ryegrass, johnsongrass, and barnyardgrass. The research conducted will assess the best programs to control these troublesome weeds, utilizing combinations of tillage, cover crops and herbicides with multiple modes of action. The interaction of different traits and herbicides will also be investigated.

Objective 2. Examine weed control failures on producer’s farms and elucidate if due to true herbicide resistance or some other factor (weather, application error, etc.). The effort is more important as all new herbicide labels, including those for Roundup Xtend Soybeans, are mandated by EPA to quickly assess if weed control failures are due to resistance. Efforts will also be sure to consider if herbicide tolerance is developing to glufosinate, dicambia or 2,4-D.

Project Objectives

Project Deliverables

Progress Of Work

Final Project Results

Benefit To Soybean Farmers

The United Soybean Research Retention policy will display final reports with the project once completed but working files will be purged after three years. And financial information after seven years. All pertinent information is in the final report or if you want more information, please contact the project lead at your state soybean organization or principal investigator listed on the project.