Dr. Roy L. Hedden

Professor Emeritus, Forestry and Forest Entomology

Email: rhddn@clemson.edu

School of Agricultural, Forest, and Environmental Sciences

Ph.D. University of Washington, Forest Entomology - 1976
M.S. University of Washington, Forest Entomology - 1972
B.S. University of Washington, Forest Resources - 1971

Research interest:
Research Areas Include: 1. Changes to bark beetle populations as a consequence of fuel reduction treatments in Piedmont forest ecosystems, Phase II (USFS funded) 2. Rearing of Laricobius nigrinus for control of the hemlock wooly adelgid in the Chattooga River watershed (in cooperation with Dr. Joe Culin, Dept. of Entomology; funded by the National Forest Foundation and USFS) 3. Surveying and mapping HWA Infestations in South Carolina (South Carolina Commission of Forestry) 4. Assessing the damages of the southern pine beetle infestation to the viewsheds of South Carolina using modeling, GIS and 3D visualization. (Co-PI with Bo Song and Tom Williams)

Hedden, R. 1998. Impact of Nantucket pine tip moth attack on loblolly pine--a south-wide summary. pp 569-572. In Waldrop T. A., ed. Proc. of the Ninth Bien. South. Silvic. Res. Conf. USDA For. Servo Gen. Tech. Rep. SRS-20, Asheville, NC
Jolley, L. W., R. L. Hedden. 2001. Tip dieback associated with Lasiodiplodia theobromae infection. Phytopathology 91: S45.
Hedden, R. L. 2001. Impact calculator for Nantucket tip moth in Loblolly pine plantations. Clemson University, Clemson, SC.
Hedden, R. 2002. Impact of pine tip moth attack on loblolly pine. pp 1-7. In Berisford, CW, Grosman DM, eds. Management of pine tip moths: Old problems - new research, Gen. Tech. Rep. SRS-51. Asheville, NC: USDA For. Serv, South. Res. Stat. 68 p.

Honors and awards:
Hedden, R. L., R. P. Belanger, H. R. Powers, Jr. and T. Mill.er. 1991: Relation of Nantucket pine tip moth attack and fusiform rust in loblolly pme families. South. J. Appl. For. 15:204~208.
Burkhart, H. E., D. E. Munsey, Jr., R. L. Amateis, and R. L. Hedden. 1992. Predicting impact of southern pine beetle infestations on rotation-age yield of loblolly pine stands. For. Ecol. Manage. 47:261~268.
Hedden, R. L., T. S. Fredericksen, and S. A. Williams. 1995. Modeling the effect of crown shedding and streamlining on the survival of loblolly pine exposed to acute wind. Can. J. For. Res. 25:704-712.
Fredericksen, T. S., R. L. Hedden, and S. A. Williams. 1995. Susceptibility of loblolly pine to bark beetle attack following simulated wind stress. For. Ecol. Manage. 76:95-107.

Forest Entomology
Forest Policy and Administration (FOR 416/613)
Integrated Forest Pest Management (FOR 413/613)
Introduction to the Environment and Natural Resources (E N R 101)
Introduction to Pests (summer camp)
Taught portions in several short courses such as the U. S. Forest Service PASS Course