I joined the Entomology and Plant Pathology Department in April 1985. I received my Ph.D. at North Carolina State University under the supervision of Dr. Leon Lucas in the Department of Plant Pathology, where I studied the biology of Rhizoctonia zeae. Since joining UT Extension with a 100% Extension appointment, I have provided leadership for educational programs in plant diseases affecting turf, ornamental plants, forages, Christmas trees and forests. This includes assisting Extension agents with their educational programs, as well as implementing a state-wide educational program in plant pathology.


Research focus

I am a member of the UTIA Dogwood Team that developed the Appalachian series of flowering dogwoods resistant to dogwood anthracnose or powdery mildew. I have worked with the Thousand Canker Disease of Walnut team and the forest health management team. I am currently part of the Combating Rose Rosette team which is funded by a USDA Specialty Crops Research Initiative grant.


Extension and outreach focus

The Green Industry (nursery, greenhouse, turf, sod) is second only to grain crops as the top ‘crop’ commodity in Tennessee. It was valued at over $315 million in 2011. In 2013, Tennessee’s turfgrass industry contributed $5.8 billion to the state’s economy and created close to 67,000 full and part-time jobs. Limiting the growth of this industry are horticultural pests which include insects, diseases and weeds. My emphasis in the last three years has been to support county Extension agents in their work with plant diseases affecting horticultural crops, also producers and managers in the Green Industry. First detector and master gardener training has also been a primary focus.

I have reached my target audiences by mass media, social media, group meetings, email, phone calls, field visits and office visits. Funding for these programs have come from Extension funds, fee based programs, USDA grants, and Southern Region IPM grants. I have supported the work of the Soil, Plant and Pest Center by assisting with plant disease diagnoses in the lab and via Distance Diagnostics.


Teaching focus



alan windham

office (615) 835-4572
EPP Nashville office (615) 832-6802
fax (615) 781-2568

Soil, Plant and Pest Center
5201 Marchant Drive
Nashville, TN 37211


B.S., Plant Pathology and Weed Science, MS State University
M.S., Plant Pathology and Botany, MS State University
Ph.D., Plant Pathology and Soil Science, North Carolina State University

Professional appointment
100% Extension

Graduate program concentrations
Sustainable Disease and Integrated Pest Management Systems

Areas of expertise
Plant disease diagnosis, plant disease management, mycology

dogwoods, roses, turfgrass, hosta, walnut, plant disease diagnosis, rose rosette, anthracnose, powdery mildew, social media, extension, mycology

Creative Art Microscope image

Extension and outreach programs

Pesticide Safety and Education Programs
Soil, Plant and Pest Center
Southern Nursery IPM Working Group
Southern Plant Diagnostic Network
Master Gardeners

Selected Publications

Trigiano, R. N., A. S. Windham, M. T. Windham, and P. A. Wadl.  2016.  ‘Appalachian Joy’: A supernumery white-bracted cultivar of Cornus florida with powdery mildew resistance.  HortScience, 51(5):592-594.

Trigiano, R. N., E. C. Bernard, M. T. Windham, A. S. Windham, T. P. Edwards, and S. L. Boggess.  2016.  First report of powdery mildew on henbit (Lamium amplexicaule) and dead-nettle (L. purpureum) caused by Neoërysiphe galeopsidis in the southern United States.  Plant Disease, 100 (11): 2332.

Rivera, Y., C. Salgado-Salazar, A. S. Windham, and J. A. Crouch.  2015.  Downy Mildew on Coleus (Plectranthus scutellarioides) caused by Pernospora belbahrii sensu lato in Tennessee.  Plant Disease.

Boggess, S. L., P. A. Wadl, D. Hadziabdic, B. E. Scheffler, A. S. Windham, W. E. Klingeman, and R. N. Trigiano.  2014.  Characterization of 12 polymorphic microsatellite loci of Pityopsis graminifolia var. latifolia.  Conservation Genetics Resources, 6(4): 1043-1045.

Hadziabdic, D., M. T. Windham, R. Baird, L. M. Vito, Q. Cheng, J. F. Grant, P. L. Lambdin, G. J. Wiggins, A. S. Windham, P. Merten, and G. Taylor.  2014.  First report of Geosmithia morbida in North Carolina: The pathogen involved in thousand cankers disease of black walnut.  Plant Disease, 98:992.



Baird, R, E. Stokes, and A. S. Windham.  2016.  Basidiomycota: Diverse Complex of Saprophytic, Parasitic, and Symbiotic Fungi.  Plant Pathology Concepts 3rd ed,CRC Press.

Chong, J.-H., J. Derr, W. Dunwell, A. Fulcher, F. A. Hale, F. Hand, W. E. Klingeman, A. LeBude, S. Marble, J. Neal, A. Ratlike, and A. S. Windham.  2016.  IPM for shrubs in southeastern US nursery production: Volume II.  Southern Nursery IPM Working Group., Eds. M. Chappell, G. W. Knox and G. Fernandez. Print ISBN: 978-0-9854998-4-6.

J. Woodward, and A. S. Windham.  2016.  Chemical Control of Plant Diseases Caused by Fungi.  Plant Pathology Concepts 3rd ed,CRC Press.

Trigiano, R. N., O. Spring, A. S. Windham, R. E. Baird, S. N. Jeffers, and K. H. Lamour.  2016.  Oomycota: Fungus-like organisms.  Book, Pp. 137-153. In: Ownley, B. H. and R. N. Trigiano (Eds.). Plant Pathology Concepts and Laboratory Exercises, Third edition.

Cochran, D.R., A. Fulcher, F. A. Hale, and A. S. Windham.  2014.  Metodo basado en sistemas para el control de plagas: una guia rapida de referencia.  manual, 47 pp.

Windham, A. S.  2014.  Disease Management, Chapter 11.  Plant Propagation Concepts and Laboratory Exercises, 2nd ed, CRC Press, Caula A. Beyl and Robert N. Trigiano, editors



2016, The Charles Pless Faculty Award, Department of Entomology and Plant Pathology.
2016, Top 25 Twitter Account for the U.S. Green Industry, Greenhouse Management Magazine.
2015, Friends of IPM, Bright Idea Award, Southern Region IPM Center.
2015, ASHS, Outstanding Education Materials Award, American Society of Horticultural Science.
2015, Pulling Together Team Award, Southern Region IPM Center.
2014, Bright Idea Award So Nursery IPM Group, Southern Region IPM Center.
2014, Southern Region -ASHS Blue Ribbon Communications Award, American Society of Horticultural Science

For complete list of publications please visit my