Timothy Paulitz
Research Plant Pathologist,
USDA-ARS/ Adjunct Professor
Research Specialty and Interests
My program focuses on the ecology, epidemiology, and management of root diseases in cereal-based cropping systems, including wheat, barley and Brassica
Current projects:
- Disease dynamics in the transition from conventional tillage to direct-seeding
- Survey and biogeography of Pythium and Rhizoctonia in eastern Washington
- Molecular detection and quantification of Pythium and Rhizoctonia from soil using real time PCR and ITS sequences
- Population biology and structure of Rhizoctonia in eastern Washington, using AFLP markers.
- Spatial analysis of Rhizoctonia oryzae in direct-seed systems, at scales of 0.3 m to 100 m, using GPS referenced locations.
- Cultural techniques for management of root diseases, including seed opener disturbance, residue management, fallow, variable N application, and greenbridge management.
- Population dynamics of Rhizoctonia in chemical and mechanical fallow
- Testing of chemical seed treatments for Rhizoctonia control.
- Rhizoctonia solani AG 2-1 on Brassica crops
- Dynamics of Rhizoctonia bare patches in direct-seed rotations
- Development of methods to screen germplasm for tolerance and resistance to Rhizoctonia and Pythium
Professional Experience
- Research Plant Pathologist, USDA-ARS Root Disease and Biological Control Research Unit, Pullman, WA. June 2000-present.
- Associate Professor, Dept. Plant Science, Macdonald Campus of McGill University, Ste. Anne de Bellevue, Quebec, Canada, June 1994-June 2000.
- Assistant Professor, Dept. Plant Science, Macdonald Campus of McGill University, Ste. Anne de Bellevue, Quebec, Canada, Dec. 1989-April 1994.
- Postdoctoral Research Associate, USDA-ARS Horticultural Research Laboratory, Sept. 1987- Nov. 1989.
- Visiting assistant professor, Department of Plant Pathology and Weed Science, Sept. 1984-Sept. 1987.
Awards/Honors/Memberships
American Phytopathological Society (APS)
Canadian Phytopathological Society
Mycological Society of America
Selected Publications
Paulitz, T. C., Smiley, R. and Cook, R. J. 2002. Insights into the prevalence and management of soilborne cereal pathogens under direct seeding in the Pacific Northwest, U.S.A. Can. J. Plant Pathol. 24: 416-428.
Smiley, R., Cook, R. J. and Paulitz, T. 2002. Seed treatments for small grain cereals. Oregon State University Extension Publication EM 8797.
Smiley, R., Cook, R. J. and Paulitz, T. 2002. Controlling root and crown diseases of small grain cereals. Oregon State University Extension Publication EM 8799.
Paulitz, T. C. 2002. First report of Rhizoctonia oryzae on pea. Plant Disease 86: 442.
Paulitz, T. C., Adams, K., and Mazzola, M. 2003. Pythium abappressorium- a new species from eastern Washington. Mycologia 95: 80-86.
Paulitz, T. C. and Adams, K. 2003 Composition and distribution of Pythium communities from wheat fields in eastern Washington State. Phytopathology. 93: 867-873.
Paulitz, T. C., Smith, J. D. and Kidwell, K. K. 2003. Virulence of Rhizoctonia oryzae on wheat and barley cultivars from the Pacific Northwest. Plant Disease 87:51-55.
Paulitz, T. C., Zhang, H. and Cook, R. J. 2003. Spatial distribution of Rhizoctonia oryzae and Rhizoctonia root rot in direct-seeded cereals. Canadian Journal of Plant Pathology. 29: 295-303.
Paulitz, T. C., Dugan, F., Chen, W., and Grünwald, N. J. 2004. First report of Pythium irregulare on lentils in the United States. Plant Disease 88: 310.
Higginbotham, R. W., Paulitz, T. C., Campbell, K. G. and Kidwell, K. K. 2004. Evaluation of adapted wheat cultivars for tolerance to Pythium root rot. Plant Disease 88:1027-1032.
Higginbotham, R. W., Paulitz, T. C., and Kidwell, K. K. 2004. Virulence of Pythium species isolated from wheat fields in eastern Washington. Plant Disease 88:1021-1026.
Paulitz, T. C. and Schroeder, K. L. 2005. A new method for quantification of Rhizoctonia solani and R. oryzae from soil. Plant Disease 89: 767-772.
Okubara, P. A., Schroeder, K. L., and Paulitz, T. C. 2005. Real-time polymerase chain reaction: Applications to studies on soilborne pathogens. Canadian Journal of Plant Pathology 27: 1-14.
Okubara, P. A. and Paulitz, T. C. 2005. Molecular bases of root defense responses. Plant and Soil 274: 221-232.
Schillinger, W. C. and Paulitz, T. C. 2006. Reduction of Rhizoctonia bare patch of wheat with barley rotation. Plant Disease 90:302-306
Schroeder, K. L. and Paulitz, T. C. 2006. Assessment of root diseases on wheat and barley in the transition from conventional tillage to direct seeding. Plant Disease: in press
Feng, P. C., Baley, G. J., Clinton, W. P, Bunkers, G. J., Alabhai, M F., Paulitz, T. C. and Kidwell, K. K. 2005. Glyphosate inhibits rust diseases in glyphosate-resistant wheat and soybean. Proceedings of the National Academy of Sciences 102: 17290-17295.
Paulitz, T. C., Okubara, P. A. and Schillinger, W. F. 2006. First report of damping-off of canola caused by Rhizoctonia solani AG 2-1 in Washington State. Plant Disease 90:829.
Schroeder, K. L., Okubara, P. A., Tambong, J. T., Lévesque, C. A. and Paulitz, T. C. 2006. Identification and quantification of pathogenic Pythium spp. from soils in eastern Washington using real-time polymerase chain reaction. Phytopathology 96:637-647.
Johnson
Hall 329 (office) &
328 (lab)
Tel.: (509)335-7077
Fax: (509)335-9581
E-mail: paulitz@wsu.edu
Teaching:
Other Teaching Activities:
Professional Activities:
2004-present; Senior Editor, American Phytopathogical Society Press
2003-present; Patent Committee, USDA-ARS Pacific Region
2002-present; Member, W-147 Biological Control of Soilborne Pathogens
1999-2002; Member of U.S. Wheat and Barley Scab Initiative Review Panel
2001-present; Section Editor, Canadian Journal of Plant Pathology
1998-2002; Section Editor, Plant and Soil
1994-1997; Senior Editor, Phytopathology
1991-1994; Associate Editor, Phytopathology
1998-2000; Junior and Senior Director, Board of the Canadian
Phytopathological Society.
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