Project Details:

Research and Extension Support for Management of Glyphosate-Resistant Weeds

Parent Project: This is the first year of this project.
Checkoff Organization:Tennessee Soybean Promotion Board
Organization Project Code:19-020-R
Project Year:2019
Lead Principal Investigator:Thomas Mueller (University of Tennessee-Institute of Agriculture)
Co-Principal Investigators:

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Information and Results

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Project Summary

Objective 1. We propose to continue small plot research on GR weeds, including Palmer Pigweed, horseweed (marestail), and the emerging problems of GR grassy weeds, including goosegrass, ryegrass, johnsongrass, and barnyardgrass. The research conducted will assess the best programs to control these troublesome GR 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.

Objective 3. Develop and validate test systems to compare dicambia and 2,4-D formulations under field controlled conditions with respect to possible off-target movement. Objective data on this important topic has been and will be used by government agencies in regulatory decisions.

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Benefit to Soybean Farmers

Performance Metrics

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