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Stephen R. Koenning
Associate Professor
Appointment: 70% Research, 30% Extension
- BS (Biology), University of Arizona
- MS (Plant Pathology), University of Arizona
- PhD (Plant Pathology), North Carolina State University
Research Activities
Disease management, nematology, sustainable agriculture, IPM, cropping systems, host plant resistance to nematodes, nematode ecology.
Multi-State Project
Host Resistance as the Cornerstone for Managing Plant-Parasitic Nematodes in Sustainable Agroecosystems
Extension Responsibilities
Soybean, cotton, and corn
My primary research interests are in the area of nematode management and ecology. The program addreses basic and applied aspects of nematode management in cotton and soybean. On-farm research is conducted in the eastern part of North Carolina and serves as demonstration sites for extension. Host plant resistance, cover crops, rotation and other cultural practices are evaluated in field scale experiments. Cooperative studies are conducted with faculty in the crop and soil sciences departments.
Refereed Publications
- Koenning, S.R., F.F. Abdel Alim, L.F. Grand, and P.M. Phipps. 2000. Stem canker of cotton caused by Phoma exigua in North Carolina and Virginia. Plant Disease 84:1251.
- Koenning, S. R. 2000. Density-dependent yield of Heterodera glycines-resistant- and susceptible-cultivars. Journal of Nematology 32(4S):502-507.
- Koenning, S. R., K. R. Barker, and D. T. Bowman. 2000. Tolerance of selected cotton lines to Rotylenchulus reniformis. Journal of Nematology 32(4S):519-523.
- Koenning, S.R., K.R. Barker, and D.T. Bowman. 2001. Resistance as a tactic for management of Meloidogyne incognita on cotton in North Carolina. Journal of Nematology 33:126-131.
- Koenning, S.R. 2002. Tolerance to Hoplolaimus columbus in glyphosate-resistant transgenic soybean cultivars. Journal of Nematology 34:370-373.
- Davis, R. F., S. R. Koenning, R. C. Kemerait, T.D. Cummings, and W. D. Shurley. 2003. Rotylenchulus reniformis management in cotton with crop rotation. Journal of Nematology 35:58-64.
- Koenning, S. R., K. L. Edmisten, K. R. Barker, and D. E. Morrison. 2003. Impact of cotton production system on Hoplolaimus columbus. Journal of Nematology 35:73-77.
- Koenning, S. R., K. R. Barker, K. L. Edmisten, D. T. Bowman, and D. E. Morrison. 2003. Effects of rate and time of application of poultry litter on Hoplolaimus columbus on cotton. Plant Disease 87:1244-1249.
- Tu, C., S. R. Koenning, and S. Hu. 2003. Root-parasitic nematodes enhance soil microbial activities and nitrogen mineralization. Microbial Ecology 46:134-144.
- Wrather, J. A., S. R. Koenning, and T. Anderson. 2003. Effect of diseases on soybean yields in the United States and Ontario 1999-2002. Online. Plant Health Progress doi:10.1094/PHP-2003-0325-01-RV. (article full text)
- Koenning, S. R., T. L. Kirkpatrick, J. L. Starr, J. A. Wrather, N. A. Walker, and J. D. Mueller. 2004. Plant-parasitic nematodes attacking cotton in the US: old and emerging production challenges. Plant Disease 88:100-113.
- Koenning, S. R. 2004. Resistance of soybean cultivars to field populations of Heterodera glycines in North Carolina. Plant Disease 88:942-950.
- Koenning, S. R., K. R., Barker. 2004. Influence of poultry litter applications on nematode communities in a cotton-production environment. Journal of Nematology 36:000-000 (in press).
Book Chapters
- Koenning, S.R., and B.S. Sipes. 1998. Biology, Pp. 156-190 in S.B. Sharma (Ed.) Cyst-forming Nematodes. Chapman and Hall, London.
- Barker, S.R., and S.R. Koenning. 1998. Developing sustainable systems for nematode management. Annual review of Phytopathology 36:165-205.
- Hillocks, R.J., and S.R. Koenning. 2001. Other stem and root diseases. PP. 33. In T.L. Kirkpatrick, and C.S. Rothrock eds. Compendium of Cotton Diseases. APS Press: St. Paul, Minnesotta.
- Koenning, S. R. 2002. Nematicides. PP1-4, In D.M. Pimentel ed. Dekker Encyclopedia of Pest Management. Marcel Dekker: New York, NY. (chapter full text)
- Koenning, S. R. 2004. Population biology. Pp. 73-88. In D.P. Schmitt, J.A. Wrather, and R.D. Riggs eds. Biology and Management of Soybean Cyst Nematode, Second Edition. Schmitt and Associates of Marceline: Marceline, MO.
- Schmitt, D.P., S. R. Koenning, and K. R. Barker 2004. Population density based management. Pp. 89-110. In D.P. Schmitt, J.A. Wrather, and R.D. Riggs eds. Soybean Cyst Nematode, Biology and Management. Schmitt and Associates of Marceline: Marceline, MO.
Memberships in Scientific Societies
- American Phytopathological Society
- Society of Nematologists
- Southern Soybean Disease Workers
- Organization of Tropical American Nematologists
- North Carolina Society of Plant Pathology
Awards
- Best Student Paper Award 1983 (Southern Soybean Disease Workers)
- Best Economic Paper Award 1986 (Society of Nematologists)
- Distinguished Service Award 1999 (Southern Soybean Disease Workers)
- Novartis Crop Protection Award 2000 (Society of Nematologists)
Additional Sites
Contact Information
Dr. Stephen R. Koenning
Department of Plant Pathology
840 Method Road
NCSU, Box 7616
Raleigh, NC 27695
Tel: (919) 515-3905
FAX: (919) 515-7716
Email: srkpp@unity.ncsu.edu
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