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Robert M. (Bob) Hayes
Director and Professor
Weed Science

Groups and Facilities

1 mention

Weed Diagnostics Center 
Diagnostic testing services for weeds of crop and non-cropland systems including turfgrass, ornamentals, and utility rights of way.

1 mention

Turfgrass Weeds 
Turfgrass weed management recommendations and publications.



7 mentions

Weed Research 
A climate that's good for a variety of crops means many types of weeds also thrive. UT AgResearch works to help farmers battle this yearly problem that can greatly affect their yields.

6 mentions

Sweet corn 
UT AgResearchers applied herbicides to experimental sweet corn to keep weeds away. But something unexpected happened -- they boosted the nutritional value of the corn.

4 mentions

Weed Progress 
Weeds are a nuisance to gardeners, but downright devastating to those who farm for a living. But now experts and farmers say the worst may be behind us.

1 mention

Nozzle Selection 
Nozzle selection has been simplified over the years, but different types of nozzles are needed for different situations.

1 mention

Weed Olympics 
We've had an Olympic competition here in Tennessee involving ... plants. More specifically, plants we don't like or want. It's called the 'Weed Olympics' on the UT agriculture campus.


Recent Publications

Avoid herbicide resistance by understanding how herbicides work.  Breeden, G. K., J. T. Brosnan, and J. J. Vargas.  2017.  Tennessee Greentimes. 18(3):16-20..

Confirmation and control of annual bluegrass resistant to photosystem II inhibiting herbicides Brosnan, J. T., G. K. Breeden, J. J. Vargas, S. Boggess, R. N. Trigiano, and M. E. Staton.  2017.  International Turf Society Res. Journal.

A rapid diagnostic assay for detecting herbicide resistance in annual bluegrass.  Brosnan, J. T., J. J. Vargas, E. H. Reasor, and G. K. Breeden.  2017.  Proc. Northeastern Plant Pest and Soils Conference, 2:102.

A Diagnostic Assay to Detect Herbicide Resistance in Annual Bluegrass (Poa annua).  Brosnan, J. T., J. J. Vargas, E. H. Reasor, R. Viggiani, G. K. Breeden, and J. M. Zobel.  2017.  Weed Technology, 31:609-616.

Controlling herbicide resistant annual bluegrass (Poa annua) phenotypes with methiozolin.  Brosnan, J. T., J. J. Vargas, G. K. Breeden, S. L. Boggess, M. E. Staton, P. A. Wadl, and R. N. Trigiano.  2017.  Weed Technology31:470-476.

Two new PPX2 mutations associated with resistance to PPO-inhibiting herbicides in Amaranthus palmeri.  Giacomini, D. A., A. M. Umphres-Lopez, H. Nie, T. C. Mueller, L. E. Steckel, B. G. Young, and P. J. Tranel.  2017.  Pest Management Sci., Pest Management Sci. 73:1559-1563.

Formation of Nanoplastics from Biodegradable Plastic Mulch Films and Characterization of their Behavior in Soil Hayes, D. G., A. Astner, H. M. O'Neill, B. R. Evans, S. V. Pingali, and V. S. Urban.  2017.  BioEnvironmental Polymer Society 24th Annual Meeting, Albany, CA, 20-22 September 2017. [More]

Resistance is Futile: Estimating the Costs of Managing Herbicide Resistance as a First-order Markov Process and the Case of US Upland Cotton Producers Lambert, D. M., J. A. Larson, R. K. Roberts, B. C. English, X. Zhou, L. L. Falconer, R. J. Hogan, J. L. Johnson, and J. M. Reeves.  2017.  Agricultural Economics, 48:387-396. [More]

Evaluation of herbicides for ground ivy (Glechoma hederacea) control at two application timings.  Patton, A. J., L. L. Beck, D. V. Weisenberger, J. T. Brosnan, and G. K. Breeden.  2017.  International Turf Society Res. Journal, doi: 10.2135/cropsci2016.05.0399.

Avoiding Problems With Off-target Herbicides.  Rhodes, G. N.  2017.  Best Burley - Burley Stabilization Corporation Grower Newsletter, Issue 4, Spring 2017.

Pasture Herbicide Stewardship: Our Efforts to Reduce Off-target Damage to Sensitive, High Value Crops.  Rhodes, G. N., and D. McIntosh.  2017.  Proceedings of the American Forage and Grassland Council.

The University of Tennessee Herbicide Stewardship Educational Program: An Update.  Rhodes, G. N., L. E. Steckel, and D. McIntosh.  2017.  Proceedings of the 70th Southern Weed Science Society. Abstract 49.