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.

2021, UTIA Webster Pendergrass Outstanding Service Award.
2020, UTIA Dutch and Marilee Cavender Publication Award.
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

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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.

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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.

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

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B.S., Plant Pathology and Weed Science, MS State University (1979)
M.S., Plant Pathology and Botany, MS State University (1981)
Ph.D., Plant Pathology and Soil Science, North Carolina State University (1985)

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

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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

Copes, W. E., J. Caballero, E. Babiker, J. Stewart, V. Orner, A. S. Windham, and R. Arias.  2020.  Draft genome assembly of Passalora sequoiae a needle blight pathogen of Leyland Cypress.  BMC Research Notes, Vol 13, Issue 1, pp 1-5, BioMed Central Publisher.

Edwards, T. P., R. N. Trigiano, B. H. Ownley, A. S. Windham, C. R. Wyman, P. A. Wadl, and D. Hadziabdic Guerry.  2020.  Genetic diversity and conservation status of Helianthus verticillatus, an endangered sunflower of the southern United States.  Frontiers Genetics, 11:410.

Solo, K. M., S. B. Collins, M. K. Shires, R. Ochoa, G. R. Bauchan, K. L. Ong, M. L. Paret, X. Martini, D. H. Byrne, L. Schneider, A. Henn, J. C. Jacobi, J. L. Williams-Woodward, M. R. Hajimorad, F. A. Hale, J. B. Wilkerson, A. S. Windham, and M. T. Windham.  2020.  A Survey of Rose rosette virus and Eriophyid Mites Associated with Roses in the Southeastern United States.  HortScience.

Byrne, D. H., P. E. Klein, C. Hall, M. T. Windham, et al., A. S. Windham, F. A. Hale, M. A. Palma, L. Ribera, and H. B. Pemberton.  2019.  Combating Rose Rosette Disease US National Project.  Acta Horticulturae, 1232 30, pp. 203-212.

C. R. Wyman, D. Hadziabdic Guerry, S. Boggess, T. A. Rinehart, A. S. Windham, P. A. Wadl, and R. N. Trigiano.  2019.  Low genetic diversity suggests the recent introduction of dogwood powdery mildew to North America.  Plant Disease, Plant Dis. 103 (11): 2903-2912.

Cheng, Q., A. S. Windham, K. H. Lamour, A. M. Saxton, and M. T. Windham.  2019.  Evaluation of variation in switchgrass (Panicum virgatum L.) cultivars for rust (Puccinia emaculata) resistance.  Journal of Environmental Horticulture, 37(4):127-135.

Solo, K., S. B. Collins, L. Schneider, M. R. Hajimorad, F. A. Hale, J. B. Wilkerson, A. S. Windham, and M. T. Windham.  2019.  Evaluation of Floral Cuts on Eriophyid Mite Retention on Knock Out and Multiflora Rose Cuttings.  Plant Health Progress, 20:83-87.

Solo, K., S. B. Collins, L. Schneider, M. R. Hajimorad, F. A. Hale, J. B. Wilkerson, A. S. Windham, D. Byrne, and M. T. Windham.  2019.  Evaluation of Rosa species accessions for resistance to eriophyid mites.  Journal of Environmental Horticulture, 37(4):108-112.


Windham, M. T., A. S. Windham, and A. Henn.  2020.  Rose Diseases.  Consulting Rosarian Manual, Chapter 10. American Rose Society. Shreveport, LA. pp.26.

Windham, A. S.  2018.  Plant Diseases.  TN Master Gardener Handbook, Ch. 14, 32 pp.

Windham, M. T., A. S. Windham, and A. Henn.  2018.  A Guide to Rose Diseases and Their Management.  American Rose Society.

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


Samples, T. J., N. R. Bumgarner, A. S. Windham, B. J. Horvath, and J. C. Sorochan.  2020.  Chapter 6. Diseases.  Residential Turfgrass Management in Tennessee Notebook, 50 pp.

Windham, A. S.  2020.  A Look at Allelopathy.  UT Extension, W 962.

Windham, A. S.  2019.  Plant Disease Concepts for Master Gardener Interns.  Master Gardener Handbook PPTX, Master Gardener Handbook PPTX.

Windham, A. S., and M. T. Windham.  2019.  Boxwood Blight.  UT Extension, 3pp, W816.

Windham, A. S., and M. T. Windham.  2019.  Rose Diseases, Identification and Management.  UT Extension, W833: 8pp.

Windham, A. S., and M. T. Windham.  2019.  Diagnosis of Ornamental Plant Diseases.  UT Extension, 6pp, W834, Aug 2019.

Windham, A. S., and M. T. Windham.  2019.  Boxwood Blight.  Turf and Ornamental Field Day, #UTTurfFD19 pp 36-38.

Windham, A. S., M. T. Windham, and F. A. Hale.  2019.  Early Detection of Rose Rosette Disease.  SP 806, UT Extension, 2pp


Samples, T. J., J. C. Sorochan, and A. S. Windham.  2021.  Water, Functions, Flow and Forms.  North Carolina Turfgrass, March/April 2021, pp 18, 20, 22, 24, 26.

Windham, M., B. Pemberton, K. Ong, A. Windham. 2021. Rethinking Black Spot. American Rose Magazine. American Rose Society. July/Aug. pp. 79-86.

Samples, T. J., J. C. Sorochan, and A. S. Windham.  2020.  Water: Functions, flow and forms.  Tennessee Turfgrass., December/January. p. 26, 28, 30, 32, 34.

Windham, M. T., and A. S. Windham.  2020.  Downy mildew: hit or miss but always potentially catastrophic.  American Rose, May/June: 82-85.

Windham, A. S.  2019.  Plant Diseases in your Garden? Don’t Panic.  Cultivate, Fall/Winter 2019 P. 13.


Hale, F. A., T. Stackhouse, D. Hadziabdic Guerry, K. Kilbourne, D. J. Paulsen, S. Gildiner, M. A. Garrison, R. Barron, J. F. Grant, and A. S. Windham.  2020.  Laurel wilt and the redbay ambrosia beetle threaten sassafras and spicebush in Tennessee.  Proceedings of the Virtual Annual Meeting of the ESA.

Windham, A. S., F. A. Hale, D. D. Hensley, M. T. Windham, B. Kauffman, and R. Florence.  2020.  New state, county records for insect and mite pests, plant diseases in Tennessee in 2019.  Phytopathology, Vol 110, Issue 7, p. 25.

Hale, F. A., T. Stackhouse, D. Hadziabdic Guerry, D. J. Paulsen, J. F. Grant, and A. S. Windham.  2019.  Laurel wilt, a new threat to sassafras and northern spicebush and their associated fauna in Tennessee and Kentucky.  Firefly, the Proceedings of the Annual Meeting of the Tennessee Entomological Society, Nashville, TN.

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