Hemlock Research

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Dr. Neelam Poudyal to Speak on Hemlock Woolly Adelgid, 9/14/2016

I AM UTIA -- In Knoxville, Meet Joe Sarten, PE, 12/9/2015


(2 mentions)

Saving the Hemlock 
Scientists and staff at Great Smoky Mountains National Park race to save the hemlock tree from extinction in their park.

(2 mentions)

Beetle Tents 
Hemlock trees in the Smoky Mountains are threatened by a tiny, deadly pest. Researchers with UT AgResearch are using a predatory beetle to feast on these harmful insects.


Recent Publications

Impact of the introduced predator, Laricobius nigrinus, on ovisacs of the overwintering generation of hemlock woolly adelgid in the eastern United States Jubb, C., A. Heminger, A. E. Mayfield III, J. Elkinton, G. J. Wiggins, J. F. Grant, J. Lombardo, T. McAvoy, A. Tait, B. Mudder, R. Crandall, and S. Salom.  2019.  Biological Control.

Influence of Imidacloprid and Horticultural Oil on Spider Abundance within Eastern Hemlocks Canopy in the Southern Appalachians A. Hakeem, J. F. Grant, P. L. Lambdin, F. A. Hale, J. Rhea, G. Wiggins, and C. Coots.  2018.  Environmental Entomology, 47(4):951-959.

Rearing and release of predators for management of hemlock woolly adelgid (Adelges tsugae) on the Cumberland Plateau in Tennessee Parkman, J. P.  2018.  Ann. Mtg., Entomol. Soc. of Am. Vancouver, B.C., Canada.

Short-term detection of imidacloprid in streams adjacent to treated hemlock stands.  Wiggins, G. J., E. Benton, J. F. Grant, and P. L. Lambdin.  2018.  The Firefly, Proceedings of Tennessee Entomological Society.

Short-term detection of imidacloprid in streams following applications in forests.  Wiggins, G. J., E. Benton, J. F. Grant, M. Kerr, and P. L. Lambdin.  2018.  Journal of Environmental Quality, 47: 571-578.

The hemlock woolly adelgid: A threat to hemlock in Tennessee.  Hale, F. A., E. Benton, and J. P. Parkman.  2017.  SP 503-G, (Revision) UT Extension.

Assessment of the impact of predatory beetle, Laricobius nigrinus (Coleoptera: Derodontidae), on hemlock woolly adelgid (Hemiptera: Adelgidae) in the eastern U.S.  Jubb, C., A. Mayfield, G. J. Wiggins, J. F. Grant, J. Elkington, T. McAvoy, J. Lombardo, B. Mudder, and S. Salom.  2017.  Proceedings of the Southern Forest Insect Work Conference, Pp. 13-14, July 25-28, 2017, Melbourne Beach, FL.

A Little Bug with a Big Bite: Impact of Hemlock Woolly Adelgid Infestations on Forest Ecosystems in the Eastern USA and Potential Control Strategies Letheren, A., S. Hill, J. Salie, J. P. Parkman, and J. Chen.  2017.  International Journal of Environmental Research and Public Health, 14 (4): 438 (17 pp.).

Short-term detection of imidacloprid in streams following treatment of eastern hemlock.  Wiggins, G. J., E. Benton, P. L. Lambdin, and J. F. Grant.  2017.  Proceedings of the USDA Interagency Research Forum on Invasive Species, pg. 74, January 10-13, Annapolis, MD (In Press).

Hemlock Woolly Adelgid (Hemiptera: Adelgidae) Abundance and Hemlock Canopy Health Numerous Years After Imidacloprid Basal Drench Treatments: Implications for Management Programs Benton, E. P., J. F. Grant, R. J. Webster, R. S. Cowles, A. F. Lagalante, A. M. Saxton, R. J. Nichols, and C. I. Coots.  2016.  Journal of Economic Entomology, 109(5): 2125-2136.

Benefits and Risks of Imidacloprid-Based Management Programs for Hemlock Woolly Adelgid.  Benton, E.P.  2016.  Ph.D. Dissertation.

Assessing relationships between tree diameter and long-term persistence of imidacloprid and olefin to optimize imidacloprid treatments on eastern hemlock. 3 Benton, E.P., J. F. Grant, R. Cowles, R. J. Webster, R. J. Nichols, A. Lagalante, and C. Coots.  2016.  Forest Ecology and Management, 70: 12-21.