Appel, David N. - Department of Plant Pathology & Microbiology

David N. Appel: Professor Emeritus; Focus Area: Forest and Shade Tree Pathology
Office:: College Station
Email:: [email protected]
Phone:: 979-218-6396

Education

Undergraduate Education
Graduate Education: Ph.D. Plant Pathology, Virginia Tech, 1981
Courses Taught: ECCB 307 Forest Protection

Areas of Expertise

Tree Disease Epidemiology
Tree Disease Management
Biology and control of Grapevine Diseases

Professional Summary

Dr. Appel is a Professor Emeritus in the Department of Plant Pathology and Microbiology (PLPM) at Texas A&M University. Since coming to Texas A&M in 1981, his research program focused on the epidemiology, diagnosis, and control of forest and shade trees, with an emphasis on the devastating oak wilt epidemic in central Texas. Dr. Appel also studied the biology and control of winegrape diseases, and was involved with statewide surveys for sudden oak death and citrus greening. He taught graduate and undergraduate courses on introductory plant pathology, plant disease diagnosis, forest protection, and environmental regulations, and served in a variety of administrative posts during his tenure at TAMU. Dr. Appel received various awards from his department and professional societies for his accomplishments, but is most proud of the impact his work had on the treatment and survival of oaks and grapevines in Central Texas.

Selected Publications

Refereed Journal Articles

McBride, S., Appel, D.N., Pontasch, F.M., Gregg, L., and O.J. Alabi. 2017. Disease Notes: First report of tobacco ringspot virus infecting an American hybrid grape cultivar in Texas. Plant Disease 101:1062.

Montague, T., Hellman, E.W., Appel, D., and M. Krawitzky. 2015. Asexual propagation of grapevine transmits Pierce’s Disease pathogen (Xylella fastidiosa) to rooted cuttings. International Journal of Fruit Science 16: 135-149

Stewart, L.R., Morrison, M.L. Hutchinson, M.R., Appel, D.N., and R.N. Wilkins. 2014. Effect of a forest pathogen on habitat selection and quality for the endangered golden-cheeked warbler. Wildlife Society Bulletin 38:279 – 287.

Stewart, L.R., Morrison, M.L., Appel, D.N., and R.N. Wilkins. 2014. Spatial and temporal distribution of oak wilt in golden-cheeked warbler habitat. Wildlife Society Bulletin 38:288-296.

Extension Publications

Appel, D., and A. Brown. 2017. Grapevine Trunk Diseases. Texas A&M AgriLife Extension, EPLP-034.

McBride, S., and D.N. Appel. 2017. Fire Blight of Ornamental Pears. Texas A&M AgriLife Extension, EPLP-029.

McBride, S. and D.N. Appel. 2016. Hypoxylon Canker of Oaks. Texas A&M AgriLife Extension, EPLP-030.

McBride, S., and D.N. Appel. 2016. Rapid Decline of Post Oaks in Texas. Texas A&M AgriLife Extension, EPLP-033.

Appel, D.N., Cameron, R.S., Wilson, A.D., and Johnson, J.D. 2014. How to identify and manage oak wilt in Texas. How-To-SR-1, U.S. Department of Agriculture, Forest Service, Southern Research Station, New Orleans, LA.

Appel, D.N. 2012. Pathogen biology and epidemiology, pages 22-24, in, J. Kamas, ed., Pierce’s Disease Overview and Management Guide: a resource for grape grower in Texas and other eastern U.S. growing areas. Texas AgriLife Extension Service. 103 pp.

Appel, D.N. 2012. Diagnosis of Pierces’s disease, pages 24-29, in, J. Kamas, ed., Pierce’s Disease Overview and Management Guide: a resource for grape grower in Texas and other eastern U.S. growing areas. Texas AgriLife Extension Service. 103 pp.

Appel, D.N., and J. Lewis. 2012. Further expansion of the pathogen into the Texas High Plains, pages 30 – 31, in, J. Kamas, ed., Pierce’s Disease Overview and Management Guide: a resource for grape grower in Texas and other eastern U.S. growing areas. Texas AgriLife Extension Service. 103 pp.

Books, Reviews and Book Chapters

Juzwik, J., and D. Appel.2016. Oak Wilt. Pages 129 – 133, in, Bergdahl, A.D., and Hill, A., tech. cords. Diseases of trees in the Great Plains. Gen. Tech. Rep. RMRS-GTR-335. Fort Collins, CO. USDA Forest Service, Rocky Mountain Research Station. 229 pp.

McBride, S., and Appel, D. N. 2015. Phymatotrichopsis Root Rot. In: “Compendium of Grape Diseases, Disorders, and Pests” Second Edition. W. F. Wilcox, W. D. Gubler, and J. K. Uyemoto, eds., APS Press. St. Paul Minnesota.

Technical publications

McBride, S., Appel, D.N., Pontasch, F.M., Gregg, L., and O.J. Alabi. 2017. Survey for grapevine leafroll associated virus 3 in Texas vineyards. Phytopathology 107:1-2

Appel, D.N. and K. L. Ong. 2015. The results of survey for citrus greening on the Upper Gulf
Coast of Texas. Phytopathology 105 (Suppl. 2):S2.1.

McBride, S.A. and D. N. Appel. 2015. The control of cotton root rot in Texas winegrapes with the fungicide flutriafol. Phytopathology 105 (Suppl. 2):S2.7.

Appel, D.N. 2014. Long term trends and epidemiology of Pierce’s Disease in Texas. Page 86, in, Technical Abstracts of the 65^th ASEV National Conference, June 23-27, 2014, Austin, TX.

Kurdyla, T., Pham, J., McBride, S., and D.N. Appel. 2014. Survey and detection of Phytophthora ramorum, the Sudden Oak Death pathogen in Texas. Phytopathology 104:S2.6.

McBride, S., Appel, D., and K. Ong. 2014. A clinical perspective on public plant health trends in Texas. Phytopathology 104:S2.7.

McBride, S., Lewis, J.L. Kamas, J., and D.N. Appel. 2014. Promising strategies for managing cotton root rot of winegrapes in Texas. Page 165, in, Technical Abstracts of the 65^th ASEV National Conference, June 23-27, 2014, Austin, TX.

McBride, S., Lewis, J.L. Kamas, J., Black, M., and D.N. Appel. 2013. Field trials for control of Phymatotricopsis omnivore in grapevines in Texas. Phytopathology 103:7-7.

McBride, S., Richards, C., Appel, D., and J. Pase. 2012. Identification of a potential pyrophilous fungus following a forest fire in Bastrop, TX. Phytopathology 102:S4.78.

Popular Publications

Appel, D.N. 2015. Bacterial leaf scorch on common woody plants of Texas landscapes. TNLA
Green 17:7-9.