Joyce Tredaway

Assistant Professor and Extension Weed Specialist

Department of Crop, Soil and Environmental Sciences


1998 – Ph.D., Plant and Soil Sciences, Weed Science, The University of Tennessee

1995 – M.S., Agronomy and Soils, Weed Science, Auburn University

1993 – B.S., Agronomy and Soils, Auburn University

Professional experience

2015 – Present – Assistant Professor and Extension Weed Specialist, Dept. of Crop, Soil and Environmental Sciences, Auburn University

2010 – 2015 – Director, Sand Mountain Research and Extension Center, Alabama Agricultural Experiment Station, Auburn University

2009 -2010 – Acting Director, Sand Mountain Research and Extension Center, Alabama Agricultural Experiment Station, Auburn University

2006 – 2009 – Associate Director, Sand Mountain Research and Extension Center, Alabama Agricultural Experiment Station, Auburn University

2002 – 2005 – Assistant Professor, Dept. of Animal and Plant Sciences, Berry College

1999 – 2002 – Assistant Professor and Extension Weed Specialist, Agronomy Dept., University of Florida

Professional affiliations

Weed Science Society of America (WSSA)

Southern Weed Science Society (SWSS)

Delta Weed Workers Group (DWWIGIT)

International Weed Science Society (IWWS)

Research Activities

1. Xtend and Enlist technologies in cotton and soybean

2. Glyphosate resistant weeds in agronomic crops

3. Ryegrass control in wheat

4. Knotroot foxtail and other problematic grasses in tall fescue, bermudagrass, and bahiagrass hayfields and pastures

5. Johnsongrass control Inzen grain sorghum

6. Quelex burndown for horseweed control

7. Biology of knotroot foxtai

Extension activities

As an extension specialist, my responsibilities include keeping the growers informed of the latest developments in weed management practices in agronomic crops and forages. I provide support and training for county extension agents in agronomic and forage-related areas pertaining to weed control and management and publish fact sheets, bulletins, timely information sheets, Web publications and articles for industry publications and mass media on current topics in weed management. I also develop and maintain educational programs for farmers, NRCS personnel, regional extension agents, county coordinators, and industry. Examples include providing educational programs to the Alabama Crop Managment Association, conducting training portions Certified Crop Advisors and Pesticide Certification programs. I speak to educational groups such as elementary schools, FFA chapters, Young Farmer groups, and participate in Extension field days. I speak at many extension meetings on cotton, soybean, corn, wheat and forage weed management. My extension program includes conducting applied research to develop more effective and environmentally friendly weed management techniques for use in agronomic and forages. I also help conduct the mandatory auxin trainings that are required by the EPA for using Xtend technology. I also teach a special problems course, for students interested in participating in the Southern Weed Science Southern Weed Contest.

Select Publications

Garret B. Montgomery*, Joyce. A. Tredaway, Julie L. Reeves, and Lawrence E. Steckel. 2017. Effect of Time of Day of Application of 2,4-D, Dicamba, Glufosinate, Paraquat, and Saflufenacil Control on Horseweed (Conyza canadensis) Control. Weed Technol. 31:550-556.

Flessner, M.L.*, J. S. McElroy, J. D. McCurdy, J. M. Toombs, G. R. Wehtje, C. H. Burmester, A. J. Price, and J. Tredaway Ducar. 2015. Glyphosate-Resistant horseweed (Conyza Canadensis) control with dicamba in Alabama. Weed Technol. 29:633-640.

Enloe, Stephen F., Dorough, Henry, Tredaway Ducar, Joyce, and Jatinder S. Aulakh. Little Barley Control with Herbicides in Dormant Bermudagrass Hayfields. 2013. Forage and Grazinglands 10:1094/FG-2012-10-RS.

Hu, Y.*, E. Coneva, E. Vinson, J. R. Kessler, Jr., J. Spiers, and J. Ducar. 2012. Assessment of the Feasibility of Growing Pierce’s Disease Tolerant American and French-American Hybrid Bunch Grape Cultivars in Alabama. J. Americ. Pomolog. Soc. 66:220-223.

Hagen, A.K., J. R. Akridge, J. Ducar, and K. L. Bowen. 2011. Disease Resistance and Adaptability of Stellar and Flowering Dogwood Cultivars at Two Alabama Sites. J. Environ. Hort. 29:169-174.

J. Tredaway Ducar, S. B. Clewis, J. W. Wilcut, B. J. Brecke, W. J. Grichar, W. C. Johnson III, and G. R. Wehtje. 2009. Weed management using reduced rate combinations of diclosulam, flumioxazin, and imazapic in Peanut. Weed Technol. 23:236-242.

S. D. Willingham*, B. J. Brecke, J. Tredaway Ducar, and G. E. MacDonald. 2008. Utility of reduced rates of diclosulam, flumioxazin, and imazapic for weed management in peanut. Weed Technol. 22:74-80.