Project Details:

Research and Extension Support for Management of Herbicide-Resistant Weeds

Parent Project: Research and Extension Support for Management of Glyphosate-Resistant Weeds
Checkoff Organization:Tennessee Soybean Promotion Board
Organization Project Code:
Project Year:2020
Lead Principal Investigator:Larry Steckel (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 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.

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Benefit to Soybean Farmers

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