Hanu R. Pappu, Ph.D.
Department Chair
President Samuel Smith Endowed Chair
in Plant Virology
Other Affiliations:
Graduate Program in Molecular Plant Sciences
Professional Experience
- Department Chair, December 2008- . Adminsters state-wide research and extension programs in plant pathology and the plant pathology graduate program (M.S. and Ph.D).
- Associate Professor (60% Research, 40% Teaching), October 2002-
- Biotechnologist, Biotechnology Regulatory Services, USDA-APHIS, Riverdale, MD, 2001-2002
- Assistant and Associate Professor, University of Georgia, 1995-2001 (75% Research, 25% Extension)
- Postdoctoral Associate, University of Florida, Gainesville, FL, 1990-1994 (with Prof. C.L. Niblett)
Education
- Ph.D. University of Alberta, Edmonton (with Prof. Chuji Hiruki)
- M.Sc. Indian Agricultural Research Institute, New Delhi, India (with Prof. Anupam Varma)
- B.Sc. (Ag). A.P. Agricultural University, Bapatla, India.
Research Focus
Biology and molecular biology of members of the following virus groups: thrips-transmitted tospoviruses (Bunyaviridae), plant pararetroviruses (Caulimoviridae), potyviruses (Potyviridae), and potex and carlaviruses (Flexiviridae). Crops include vegetables, nursery/landscape/ornamentals, and legumes.
Specific areas of research encompass both basic and applied components that include
- Molecular and biotechnological approaches for characterization and control of viral diseases of crop plants.
- Genomics, proteomics, molecular epidemiology, conventional and transgenic resistance, virus detection and diagnosis, and host-virus interactions.
- Environmental impact assessments, and regulatory framework for transgenic plants/GM crops; impact of plant biotechnology on society; adoption trends of plant biotechnology in the US and other parts of the world.
Ongoing projects
- Thrips and tospoviruses in various vegetable and legume cropping systems
- Iris yellow spot virus epidemics in onion bulb and seed crops. Epidemiology, biological and molecular analysis of virus isolates, conventional and biotechnological approaches for introducing virus resistance
- Aphid-transmitted viruses in cool season food legumes: Biology, epidemiology and virus resistance
- New and emerging viruses affecting nursery and landscape industry
- Biological and molecular studies of Dahlia mosaic caulimovirus
- Molecular basis of potato-virus interactions
International Research Initiatives and Collaborations
Several ongoing international collaborative projects with scientists in Australia, Canada, Chile, Czech Republic, Egypt, France, India, Kenya, Lithuania, Mexico, the Netherlands, New Zealand, Peru and Turkey on tospoviruses of vegetables and legumes, and viruses of nursery, landscape, and ornamentals.
Awards and Honors
- Fulbright Scholar (2008)
- Mentor of the Year Award Nominee, WSU Women and Leadership Alliance Forum (2007)
- OECD Fellowship (2006)
- Advisor of Merit Award by the Graduate and Professional Students Association, WSU (2005)
- Certificate of Recognition for Inventors from WSU President Lane Rawlins (2004)
- President Samuel H. Smith Distinguished Professorship (2002)
- Certificate of Appreciation by the USDA-APHIS (2002)
- Research and Education Award by the Georgia Peanut Commission (1999)
- Peanut Research and Education Award by the American Peanut Council (1998)
- Bailey Award Nominee, American Peanut Research and Education Society (1997)
- Excellence in Research Award by the University of Georgia, Tifton Campus (1997)
- Best Research Presentation Award by the Georgia Association of Plant Pathologists (1996)
- Dr. Myer Horowitz Graduate Scholarship from the University of Alberta (1989)
Invention Disclosures
Pappu, H.R., K. Druffel, and K. Pike 2007. Materials and methods for broad spectrum detection of Barley yellow dwarf serotypes infecting wheat, barley and corn. WSU Research Foundation, Office of Intellectual Property Administration.
Pappu, H.R. and K. Druffel. 2007. A genus-wide molecular test for broad spectrum detection of members of the genus Caulimovirus. WSU Research Foundation, Office of Intellectual Property Administration.
Pappu, H.R., K. Druffel and L.J. du Toit. 2006. An ELISA-based diagnostic assay for Iris yellow spot virus infection. Methods and materials for a rapid, sensitive, and specific detection of Iris yellow spot virus. WSU Research Foundation, Office of Intellectual Property Administration.
Pappu, H.R., S.D. Wyatt, and K. Druffel. 2004. A Real Time Molecular Assay for the Detection of Dahlia mosaic virus (DMV). Methods and materials for rapid, highly sensitive, and specific detection of DMV. WSU Research Foundation, Office of Intellectual Property Administration.
Conference Presentations
Pappu, H.R. 2009. IX International Symposium on Thysanoptera and Tospoviruses. Two talks and four posters on biology, epidemiology, molecular characterization and management of Iris yellow spot virus. Seaworld Resort, Gold Coast, Queensland, Australia.
Pappu, H.R. 2009. Molecular and epidemiological insights into tospviruses and plant pararetroviruses in natural and managed ecosystems. II Meeing of the Plant Virus Ecology Network. April 21-23, 2009. International Center for Genetic Engineering and Biotechnology, Ca'Tron, Italy.
Pappu, H.R. 2008. Progress toward managing Iris yellow spot tospovirus epidemics in onion. 3rd International Conference of the Working Group on Vegetable and Legume Viruses. Ljubljana, Slovenia. August 20-23, 2008.
Pappu, H.R. 2008. Managing Iris yellow spot tospovirus Epidemics in Onion: Some Do's and Don'ts. California Garlic and Onion Symposium 2008. University of California Allium Workgroup
and the
California Garlic and Onion Research Advisory Board. Tulare, CA. February 11, 2008.
Pappu, H.R., B. Mandal, R.K. Jain, A.S. Csinos A.K. Culbreath, and D.G. Riley. 2007. Reducing the global impact of thrips-transmitted tospoviruses in diverse cropping systems: Successes gained and challenges that lie ahead. 10th International Plant Virus Epidemiology Symposium: Controlling Epidemics of Emerging and Established Plant Virus Diseases-The Way Forward. International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Hyderabad, India.
Pappu, H.R., R. Sampangi, S. Krishna Mohan, H.F. Schwartz and S.I. Rondon. 2007. Thrips-transmitted Iris yellow spot tospovirus epidemics in the US: Understanding the epidemiological factors behind the outbreaks in onion seed and bulb crops. 10th International Plant Virus Epidemiology Symposium: Controlling Epidemics of Emerging and Established Plant Virus Diseases-The Way Forward. 15-19 October, 2007, ICRISAT, Hyderabad, India.
Pappu, H.R. 2007. Increasing diversity of viruses in ornamentals: Implications for diagnosis and management. National meeting of the American Dahlia Society, September 5-9, 2007. Pheasant Run Resort, St. Charles, IL.
Pappu, H.R. 2006. Molecular epidemiology of Iris yellow spot tospovirus. Indo-US Workshop on Plant Molecular Virology. February 11-12, 2006. Indian National Science Academy, New Delhi, India.
Pappu, H.R. and S.K. Mohan. 2006. Management of Tomato spotted wilt virus epidemics: Lessons learned. National Allium Research Conference, College Station, TX. December 7-8, 2006.
Pappu, H.R. 2006. Biological and molecular aspects of Iris yellow spot virus. National Allium Research Conference, College Station, TX. December 7-8, 2006.
Selected Publications
(for a complete list, click here)
Review Articles/Book Chapters/Proceedings
Pappu, H.R., R.A.C. Jones, and R.K. Jain. 2009. Global status of tospovirus epidemics in diverse cropping systems: Successes gained and challenges that lie ahead. Virus Research 141:219–236.
Pappu, H.R. 2008. Tomato spotted wilt virus (Bunyaviridae). In: Encyclopedia of Virology. 3rd edition. Brian Mahy and Marc van Regenmortel (Eds.). Elsevier Ltd, Oxford, UK. pp. 133-138.
Gent, D., L.J. du Toit, S.F. Fichtner, S. Krishna Mohan, H.R. Pappu, and H.F. Schwartz. 2006. Iris yellow spot virus: An emerging threat to onion bulb and seed production. Plant Disease 90:1468-1480.
Munyaneza, J.E, J.M. Crosslin, A.S. Jensen, P.B. Hamm, P.E. Thomas, H.R. Pappu and A. Schreiber. 2005. Update on the potato purple top disease in the Columbia Basin. In: Proceedings, 44th Annual Washington State Potato Conference, 1-3 February 2005, Moses Lake, WA. pp. 57-70.
du Toit, L. J., Pelter, G. Q., and Pappu, H. R. 2004. IYSV challenges to the onion seed industry in Washington. Pages 103, 213-217 in: Proc. National Allium Res. Conf., Grand Junction, CO. Colorado State University, Fort Collins, CO.
Bertrand, P.F., and H.R. Pappu. 2001. Pecan bunch. In: Compendium of Nut Tree Diseases. American Phytopathological Society Press, St. Paul, MN.
Culbreath, A.K., J. W. Todd, S.L. Brown, J.A. Baldwin, and H. R. Pappu. 1999. A genetic and cultural package for management of Tomato spotted wilt virus in peanut. Biological and Cultural Tests 14:1-8.
Pappu, H.R. 1999. Biosafety issues of virus-resistant transgenic plants. pp 51-64. In: Biotechnology, Biosafety and Biodiversity: Scientific and Ethical Issues for Sustainable Development. S. Shantharam and J.F. Montgomery (Eds.). Science Publishers, Inc. Keene, NH.
Pappu, H.R. and C.L. Niblett. 1995. Application of recombinant DNA technology in plant protection: Molecular approaches to engineering virus resistance in crop plants. World Journal of Microbiology and Biotechnology 11:426-437.
Biotechnology and Biosafety Assessments
Pappu, H.R. 2004. Insect pollinated crops. Pp 35-48, In: Proceedings of the Workshop on Confinement of Genetically Engineered Crops During Field Testing. USDA-APHIS, Biotechnology Regulatory Services, Riverdale, MD. September 13-14, 2004.
Pappu, H.R. 2002. Aventis CropScience: Availability of Environmental Assessment for Extension of Determination of Non-regulated Status of Canola Genetically Engineered for Glufosinate Herbicide Tolerance. Federal Register 67 (41):9431-9432.
http://www.aphis.usda.gov/brs/fedregister/BRS_20020301a.pdf
http://www.epa.gov/fedrgstr/EPA-IMPACT/2002/March/Day-01/i4909.htm
Refereed Journal Articles
Bag, S., K.L. Druffel and H.R. Pappu. 2009. Completion of the molecular characterization of the multipartite RNA genome of Iris yellow spot virus (IYSV, genus Tospovirus, family Bunyaviridae): Structure and genome organization of the large RNA of IYSV. Archives of Virology. In press.
Eid, S., D.E. Saar, K.L. Druffel, and H.R. Pappu. 2009. Plant para-retroviral sequences in wild Dahlia species in their natural habitats in Mexican mountain ranges. Plant Pathology. Accepted.
Lobin, K., A. Saison; B. Hostachy, S.P. Benimadhu, and H.R. Pappu. 2009. First report of Iris yellow spot virus in onion in Mauritius. Plant Disease. Accepted.
Eid, S., K.L. Druffel, D. Saar, and H.R. Pappu, 2009. Incidence of multiple and distinct species of caulimoviruses in dahlia (Dahlia variabilis). HortScience44:1498–1500.
Miglino, R., K. L. Druffel, A. R. van Schadewijk, and H. R. Pappu. 2009. Identification and molecular characterization of a new potyvirus infecting Triteleia species. Archives of Virology. Accepted.
Miglino, R., K. L. Druffel, A. R. van Schadewijk, H. R. Pappu. 2009. Molecular characterization of “Allium virus X”, a new potexvirus in the family Flexiviridae, infecting ornamental allium. Archives of Virology. Accepted.
Sengoda, V.S., J.E. Munyaneza, J.M. Crosslin, J.L. Buchman, and H.R. Pappu. 2009. Phenotypic and etiological differences between psyllid yellows and zebra chip diseases of potato. Amer J Potato Research DOI 10.1007/s12230-009-9115-x.
Murray, T.D., H.R. Pappu, and R.W. Smiley. 2009. First report of Soilborne wheat mosaic virus on Triticum aestivum in Washington State. Plant Health Progress. Accepted.
Lin, Y-H., K.L. Druffel, J. Whitworth, M.J. Pavek, and H.R. Pappu. 2009. Molecular characterization of two Potato Virus S isolates from late blight resistant genotypes of potato (Solanum tuberosum). Archives of Virology 154:1861-1863. DOI 10.1007/s00705-009-0486-6.
Bag, S., K.L. Druffel, T. Salewsky, and H.R. Pappu. 2009. Nucleotide sequence and genome organization of the medium RNA of Iris yellow spot virus (genus Tospovirus, family Bunyaviridae) from the United States. Archives of Virology 154:715-718.
Bag, S., and H.R. Pappu. 2009. Symptomatology of Iris yellow spot virus in selected indicator hosts. Plant Health Progress. doi:10.1094/PHP-2009-0824-01-BR.
Bag, S., P. Rogers, R. Watson, and H.R. Pappu. 2009. First report of natural infection of garlic (Allium sativum) with Iris yellow spot virus in the United States. Plant Disease 93:839.
Bag, S., J. Singh, R.M. Davis, W..Chounet, and H.R. Pappu. 2009. Iris yellow spot virus in Nevada and Northern California. Plant Disease 93:674.
Pappu, H.R., and K.L Druffel. 2009. Use of conserved genomic regions and degenerate primers in a PCR-based assay for the detection of members of the genus Caulimovirus. Journal of Virological Methods 157:102–104.
Evans, C.K., S. Bag, E. Frank, J. Reeve, C. Ransom, D. Drost, and H.R. Pappu. 2009. Natural infection of Iris yellow spot virus in Twoscale saltbush (Atriplex micrantha) growing in Utah. Plant Disease 93:430.
Sampangi, R., C. Almeyda-Beccarra, K.L. Druffel, S. Krishna Mohan, and H.R. Pappu. 2009. First report of natural infection of Penstemon acuminatus with Cucumber mosaic virus. Plant Disease 93:762.
Samuitiene, M., M. Navalinskiene, S.G. Eid, and H.R. Pappu. 2009. Dahlia mosaic-associated caulimoviruses in dahlia (Dahlia variabilis) in Lithuania. Plant Health Progress Online.doi:10.1094/PHP-2009-0302-01-BR.
Gieck, S.L., P.B. Hamm, N.L. David, and H.R. Pappu, 2009. First Report of Garlic virus B and Garlic virus D in Garlic in the Pacific Northwest. Plant Disease 93:431.
Evans, C.K., S. Bag, E. Frank, J. Reeve, C. Ransom, D. Drost, and H.R. Pappu. 2009. Green foxtail (Setaria viridis), a naturally infected grass host of Iris yellow spot virus in Utah. Plant Disease 93:670.
Pahalawatta, V., K.L. Druffel, and H.R. Pappu. 2008. A new and distinct species in the genus Caulimovirus exists as an endogenous plant pararetroviral sequence in its host, Dahlia variabilis. Virology 376:253-257.
Pappu, H.R., K.L. Druffel, R. Miglino, and A. R. van Schadewijk. 2008. Nucleotide sequence and genome organization of a new and distinct caulimovirus associated with dahlia mosaic. Archives of Virology 153:2145–2148.
Segwagwe, A.T., M.L. Putnam, K.L. Druffel, H.R. Pappu, and K.C. Eastwell. 2008. Molecular characterization of a new tymovirus from Diascia ornamental plants. Archives of Virology 153:1495–1503.
Pappu, H.R., and M.E. Matheron. 2008. Characterization of Iris yellow spot virus from onion in Arizona. Plant Health Progress. doi:10.1094/PHP-2008-0711-01-BR.
Pappu, H.R., B.C. Hellier, and F.M. Dugan. 2008. Evaluation of the National Plant Germplasm System’s Garlic Collection for Seven Viruses. Plant Health Progress doi:10.1094/PHP-2008-0919-01-RS.
Ward, L.I., Z. Perez-Egusquiza, J.D. Fletcher, F.M. Ochoa Corona, J.Z. Tang, L.W.Liefting, E.J. Martin, B.D. Quinn, H.R. Pappu and G.R.G. Clover. 2008. First Report of Iris yellow spot virus on Allium cepa in New Zealand. New Disease Reports http://www.bspp.org.uk/ndr/july2008/2008-43.asp
Pappu, H.R., K.L. Druffel, and K.C. Eastwell. 2008. Canna yellow mottle virus in Canna in Washington State. Plant Disease 92:1136.
Krishnareddy, M., R. Usha Rani, Anil Kumar, K. Madhavi Reddy and H.R. Pappu. 2008. First Report of Capsicum chlorosis virus (Genus Tospovirus) infecting Chili Pepper (Capsicum annuum) in India. Plant Disease 92:1469.
Pahalawatta, V., K.L. Druffel, S.D. Wyatt, K.C. Eastwell, and H.R. Pappu. 2008. Genome structure and organization of a novel and distinct species of genus Caulimovirus (Family Caulimoviridae) associated with dahlia mosaic. Archives of Virology 153:733-738.
Huchette, O., C. Bellamy, R. Filomenko, B. Pouleau, S. Seddas, and H.R. Pappu. 2008. Iris yellow spot virus in Shallot and Onion in France. Plant Health Progress doi:10.1094/PHP-2008-0610-01-BR.
Pappu, H.R., K.R.W. Hammett, and K.L. Druffel. 2008. First report of Dahlia mosaic virus and Tobacco streak virus in dahlia (Dahlia variabilis) in New Zealand. Plant Disease 92:1138.
Mandal, B., A.S. Csinos, N. Martinez-Ochoa, and H.R. Pappu. 2008. A highly efficient and high throughput inoculation method for Tomato spotted wilt tospovirus. J. Virological Methods 149:195-198.
Mandal, B., S. Mandal, A.S. Csinos, N. Martinez, A.K. Culbreath and H.R. Pappu. 2008. Biological and molecular analyses of the acibenzolar-S-methyl-induced systemic acquired resistance in flue-cured tobacco against Tomato spotted wilt virus. Phytopathology 98:196-204.
Pappu, H.R., I.M. Rosales, and K.L. Druffel. 2008. Serological and molecular assays for rapid and sensitive detection of Iris yellow spot virus (Genus Tospovirus, Family Bunyaviridae) infection of bulb and seed onion crops. Plant Disease 92: 588-594.
Hoepting, C.A., J. Allen, K. Vanderkooi, M. Hovius, H.R. Pappu, and M.R. McDonald. 2008. First Report of Iris yellow spot virus on Onion in Canada. Plant Disease 92:318.
Miglino, R., A. Jodlowska, H.R. Pappu, and A.R. van Schadewijk, A. R. 2007. A highly sensitive and semi-automated method for genus-wide and species-specific detection of plant viruses of ornamental bulb crops. J. Virological Methods 146:155–164.
Pappu, H.R., and K.L. Druffel. 2007. First report of Streptocarpus flower break virus in the United States. Plant Disease 91:1361.
Sampangi, R.S., S. Krishna Mohan, and H.R. Pappu. 2007. New weed hosts of Iris yellow spot virus. Plant Disease 91:1683.
Poole, G.J., H.R. Pappu, R.M. Davis, and T.A. Turini. 2007. Increasing outbreaks and impact of Iris yellow spot virus in bulb and seed onion crops in the Imperial and Antelope Valleys of California. Plant Health Progress. doi:10.1094/PHP-2007-0508-01-BR.
Mandal, B., M.L. Wells, N. Martinez-Ochoa, A.S. Csinos, and H.R. Pappu. 2007. Symptom development and distribution of Tomato spotted wilt virus in flue-cured tobacco. Annals of Applied Biology 151: 67-75.
Pahalawatta, V., R. Miglino, K.L. Druffel, A. Jodlowska, A. R. van Schadewijk, and H.R. Pappu. 2007. Incidence and relative distribution of distinct caulimoviruses (Genus Caulimovirus, Family Caulimoviridae) associated with dahlia mosaic in Dahlia variabilis. Plant Disease 91:1194-1197.
Gieck, S.L., H.R. Pappu, P.B. Hamm and N.L. David. 2007. First report of Onion Yellow Dwarf Virus, Leek Yellow Stripe Virus, and Garlic Common Latent Virus in garlic in Oregon. Plant Disease 91:461.
Nischwitz, C., H.R. Pappu, S.W. Mullis, A.N. Sparks, D.R. Langston, A.S. Csinos, and R.D. Gitaitis. 2007. Phylogenetic analysis of Iris yellow spot virus isolates from onion (Allium cepa) in Georgia and Peru. J. Phytopathology 155:531-535.
Schwartz, H.F., K. Otto, and H. R. Pappu. 2007. First report of Iris yellow spot virus in commercial leek (Allium porrum L.) in the United States. Plant Disease 91:113.
Pahalawatta, V., K. Druffel and H.R. Pappu. 2007. Seed transmission of Dahlia mosaic virus in Dahlia pinnata. Plant Disease 91:88-91.
Hoepting, C.A., H.F. Schwartz, and H.R. Pappu. 2007. First report of Iris yellow spot virus in onion in New York. Plant Disease 91:327.
Miller, M, R. Saldana, M. C. Black, and H.R. Pappu. 2006. First report of Iris yellow spot virus on onion (Allium cepa) in Texas. Plant Disease 90:1359.
Mandal, B., H.R. Pappu, A.S. Csinos, and A.K. Culbreath. 2006. Response of peanut, pepper, tobacco, and tomato cultivars to two biologically distinct isolates of Tomato spotted wilt virus. Plant Disease 90:1150-1155.
Pappu, H.R., L.J. du Toit, H.F. Schwartz and K. Mohan. 2006. Sequence diversity of the Nucleoprotein gene of Iris yellow spot virus (genus Tospovirus, family Bunyaviridae) isolates from the western region of the United States. Archives of Virology 151:1015-1023.
Pappu, H.R., B.C. Hellier and F.M. Dugan, 2006. Wild Allium spp as natural hosts of Iris yellow spot virus. Plant Disease 90:378.
Rosales, M., H.R. Pappu, L. López, R. Mora and A. Aljaro. 2005. Iris yellow spot virus in onion in Chile. Plant Disease 89: 1245.
Pappu, H.R., B.C. Hellier and F.M. Dugan, 2005. First report of Onion yellow dwarf virus, Leek yellow stripe virus and Garlic common latent virus in garlic in Washington State. Plant Disease 89: 205.
Pappu, H.R., S.D. Wyatt, and K. Druffel. 2005. Dahlia mosaic virus: Molecular detection and distribution in dahlia in the United States. HortScience 40: 697-699.
Crowe, F., and H.R. Pappu. 2005. Outbreak of Iris yellow spot virus on onion in seed crops in central Oregon. Plant Disease 89:105.
Riley, D.G. and H. R. Pappu. 2004. Tactics for Management of Thrips (Thysanoptera: Thripidae) and Tomato spotted wilt virus in tomato. Journal of Economic Entomology 97:1648-1658.
du Toit, L.J., H. R. Pappu, K. L. Druffel, and G. Q. Pelter. 2004. Iris yellow spot virus in onion bulb and seed crops in Washington State. Plant Disease 88:222.
Yang, H., P. Ozias-Akins, A. K. Culbreath, D. W. Gorbet, J. R. Weeks, B. Mandal and H. R. Pappu. 2004. Field evaluation of Tomato spotted wilt virus resistance in transgenic peanut. Plant Disease 88: 259-264.
Díaz-Pérez, J.C., K. D. Batal, D. Granberry, D. Bertrand, D. Giddings, and H.R. Pappu. 2003. Growth and yield of tomato plastic film mulches as affected by Tomato spotted wilt virus. HortScience 38:395-399.
McPherson, R.M., D.C. Jones, H.R. Pappu, and J.M. Moore. 2003. Reducing the risks of Tomato spotted wilt virus in tobacco with selected thrips control practices. J. Agric. Urban Entomol. 11-23.
Mandal, B., H. R. Pappu, A. K. Culbreath, C. C. Holbrook, D. W. Gorbet and J. W. Todd. 2002. Differential response of selected peanut genotypes to mechanical inoculation by Tomato spotted wilt virus. Plant Disease 86: 939-944.
Extension/Outreach
Providing diagnostics for growers and county faculty for a wide range of viruses of vegetables, small grains, legumes, and ornamentals.
Develop print and electronic educational and informational materials for stakeholders, delivers talks at stakeholder meetings of vegetables/legumes and ornamentals.
Presentations at Grower Meetings
Annual meeting of the Idaho-Eastern Oregon Onion Growers Association. Ontario, OR. February 6, 2007. "Managing Iris yellow spot virus epidemics in bulb and seed onion crops".
Annual meeting of the Pacific Northwest Vegetable Association. Pasco, WA. November 17, 2007. “An update on thrips and Iris yellow spot virus”.
Annual meeting of the American Dahlia Society, September 5-9, 2007, St. Charles, IL. "Increasing diversity of viruses in dahlia and the implications for diagnosis and management".
Annual meeting of the Pacific Northwest Vegetable Association. Pasco, WA. November 17, 2006. “Iris yellow spot virus: An update”.
National meeting of the American Dahlia Society, Seattle, WA. August 26-29, 2004. Presented a paper, “Diagnosis and management of viruses of dahlia”.
Annual meeting of the Pacific Northwest Vegetable Association. Pasco, WA. November 17, 2004. “Iris yellow spot virus on onions: Current status in Pacific Northwest and management options”.
Diagnostic Images
Nursery/Landscape/Floral Crops
Pappu, H.R. and K.L. Druffel. 2009. Canna yellow mottle virus infection of canna. Image of the Week. www.apsnet.org . American Phytopathological Society, St. Paul, MN. http://www.apsnet.org/online/Archive/2009/IW000089.asp
Pappu, H.R. 2009. Symptoms of Hosta virus X on hosta. Image of the Week. www.apsnet.org. American Phytopathological Society, St. Paul, MN. http://www.apsnet.org/online/Archive/2009/IW000090.asp.
Chastagner, G., and H.R. Pappu. 2009. Symptoms of Tobacco rattle virus on peony. Image of the Week. www.apsnet.org. American Phytopathological Society, St. Paul, MN. http://www.apsnet.org/online/Archive/2009/IW000087.asp
Pappu, H.R. 2004. A pictorial guide to symptoms and diagnosis of dahlia mosaic in dahlia. Bulletin of the American Dahlia Society, December 2004.
Pappu, H.R. and S.D. Wyatt. 2003. Virus Diseases of Dahlia. A web page with information on diagnosis and management of viral diseases of dahlia. http://dahlia.wsu.edu
Pappu, H.R., and S.D. Wyatt. 2003. Dahlia mosaic virus. A description of symptoms on dahlia. APSnet Image of the Week. http://apsnet.org/online/archive/2003/IW000032.asp
Vegetables
Pappu, H.R., R. Sampangi and S. Krishna Mohan. 2006. Symptoms of Iris yellow spot virus on onion. APSnet Image of the Week. http://apsnet.org/online/Archive/2006/IW000075.asp
Hellier, B., H.R. Pappu, and F. Dugan. 2005. Symptoms of Iris yellow spot virus on wild onion. APSnet Image of the Week. http://apsnet.org/online/archive/2004/iw000049.asp
du Toit, L.J., Pelter, G.Q., and Pappu, H.R. 2003. Iris yellow spot virus. APSnet Image of the Week. http://apsnet.org/online/archive/2003/IW000030.asp
Mandal, B., H.R. Pappu, and A.S. Csinos. 2003. Suppressive effect of acibenzolar-S-methyl on Tomato spotted wilt virus. APSnet ‘Image of the Week’. http://www.apsnet.org/online/Archive/2003/IW000022.asp
Pappu, H.R. 2000. Tomato spotted wilt virus on pepper. APSnet ‘Image of the Week'. http://www.apsnet.org/online/Archive/2000/iw000016.asp.
Graduate Students
- Vihanga Pahalawatta. Ph.D. Graduated in summer 2007; Assistant Professor, Alcorn State University, MS
- Sahar Eid. Ph.D. student started in fall 2007
- Yu-Hsuan Lin, Ph.D. student started in summer 2008
- Christie Almeyda, Ph.D. student started in fall 2008
- Melanie Kalischuk, PhD student started in fall 2009
Member, Graduate Student Advisory Committees:
Jeremy Buchman, MS in Entomology, Started in fall 2008.
Olufemi Alabi, PhD in Plant Pathology. Started in fall 2005.
Dan Villamor, PhD in Plant Pathology. Started in fall 2005.
Josh Lloyd, MS, University of Idaho. Graduated in 2006.
Catalina Leger. M.S. in Plant Pathology. Graduated in 2006.
Christopher Hammond. M.S. in Plant Pathology. Graduated in 2004.
Leigh Anne Harrison. M.S. in Plant Pathology. Graduated in 2006.
Hui Hou. M.S. in Plant Pathology. Graduated in 2006.
Amogelang Segwagwe. Ph.D. in Plant Pathology. Graduated in 2007.
Visiting Scientists/Post-Doctoral Fellows
-- Dr. N. Manickam, Scientist-EI,
Environmental Biotechnology Section,
Industrial Toxicology Research Centre,
Lucknow, India. July-August, 2009, on a Norman Borlaug Fellowship.
-- Dr. R. Kannan,
Associate Professor (Plant Pathology),
Department of Plant Protection, Agricultural College and Research Institute,
Killikulam,
Tamil Nadu, India, January 2009.
-- Dr. Roberto Miglino, Dutch Bulb Inspection Serivce, Lisse, The Netherlands, August 2008.
-- Mr. Joaquin Diaz, Staff Scientist, Mexican Department of Agriculture, August 2007.
-- Dr. Marlene Rosales, Staff Scientist, Instituto de Investigaciones Agropecuarias, Centro Regional de Investigación La Platina, Santiago, Chile. September 2005.
-- Dr. Celia Chalam, Staff Scientist, National Bureau of Plant Genetic Resources, New Delhi, India. October to December 2003.
-- Dr. Bikash Mandal, Senior Scientist, Indian Agricultural Research Institute, New Delhi, India May, 2000 to April 2002.
-- Dr. A. Wangai, Staff Scientist, Kenyan Agricultural Research Institute, National Plant Breeding Research Center, Njoro, Kenya (Fulbright Fellow) September 1998 to September 1999.
-- Dr. A.I. Bhat, Junior Scientist, Division of Plant Pathology, Indian Agricultural Research Institute, New Delhi, India; April 1998 to April 1999.
-- Dr. R.K. Jain, Head, Division of Plant Pathology, Indian Agricultural Research Institute, New Delhi, India. January 1997 to January 1998.
-- Mr. Hong-Soo Choi, Staff Scientist, Plant Pathology Division, Dept. of Crop Protection, National Institute of Agricultural Science and Technology, Suwon, Republic of Korea November-December, 1998).
Research and outreach activities are supported by
USDA-CSREES Western Region IPM Center, USDA-CSREES Specialty Crops Research Initiative, USDA-CSREES Critcial and Emerging Issues Program, USDA-FAS, USDA-RAMP, USDA Northwest Nursery Crop Research Center, W-SARE, WSU Agricultural Research Center, WSU Office of Research, WSU Office of International Programs, American Dahlia Society, Washington State Potato Commission, Washington Wheat Commission, Washington State Commission for Pesticide Registration, Pacific Northwest Vegetable Association, Columbia Basin Vegetable Seed Association, California Garlic and Onion Research Advisory Board, Nevada Onion Commission, and the Idaho State Department of Agriculture, Nursery and Florist Advisory Committee/Idaho Nursery & Landscape Association.
Mailing address:
Department of Plant Pathology
PO Box 646430
345 Johnson Hall
Washington State University
Pullman, WA 99164-6430
USA
Tel.: (509) 335-9541
Fax: (509) 335-9581
E-mail: hrp@wsu.edu
Office: 353 Johnson
Hall
Lab: 123 Vogel Plant Biosciences Building
Meet the lab group
For the latest on research projects, Click here
For recent events in our department, click here!
Teaching:
Viruses and Virus Diseases of Crops - PlP511. 4 credits.
An extensive and intensive overview of the nature of plant viruses including taxonomy, classification, disease induction, economic impact, plant-virus interactions, transmission, genome structure and organization, ecology, epidemiology and control. Cross-listed with University of Idaho (PlSc 511). Offered spring semester of odd years.
Molecular Genetics of Plant Pathogen Interactions - PlP 535. 3 credits. Genetic and molecular biological aspects of host-pathogen interactions. Team taught course. Cross-listed with University of Idaho (PlSc 535). Offered spring semester of even years.
General Plant Pathology - PlP 429/529. 3 credits. Classification, symptoms, causes, epidemiology, and control of plant diseases. Team taught (with Dr. Tim Murray). Offered every fall semester.
Biotechnology and Social Change. SOCI 4490. Department of Sociology, Kennesaw State University, Kennesaw, GA. Undergraduate course offered every year in May (Maymester). Invited guest lectures on principles and practice of biotechnology for crop improvement. Two modules of three hours each.
Crop Biotechnology. CropS 425:
Department of Crops and Soils. Guest lecture on the regulatory framework for field testing and commercialization of GM crops in the US.
Lab Personnel
- Keri Druffel, Res. Associate
- Dr. Venkatesan Post-doctoral Associate
- Sudeep Bag, Res. Associate
- Dr. Murthy Vemulapati, Post-doctoral Associate
- Christie Almeyda, Graduate Student, PhD
- Sahar Eid, Graduate Student, PhD
- Yu-Hsuan Lin, Graduate Student, PhD
- Melanie Kalischuk, Graduate Student, PhD
Outreach Activities:
Read the article on dahlias in the May 2008 issue of the Washigton State Magazine |
- Service
- Grant Review Panel Member: USDA-CSREES, The US National Academies
- Secretary-Elect, International Working Group on Viruses of Vegetables and Legumes.
- Multistate Research Committee: W-1008. "Biology and Management of Iris yellow spot virus and Thrips in Onions" Secretary (2009); Vice-Chair (2010); and Chair (2011)
- Associate Editor, Plant Disease (2005-2007)
- WERA-89 Potato Virus Disease Control- Secretary (2004); Vice-Chair (2005) and Chair (2006)
- APS Virology Committee (2006- )
- APS Pathogen Detection and Diagnostics Committee (2005- )
- Chair, WSU Institutional Biosafety Committee (2007- )
- Member, WSU Institutional Biosafety Committee (2004-2006)
- Chair, Department of Plant Pathology Social Activities Committee (2005-2008)
- Graduate Student Recruitment Committee, Department of Plant Pathology (2004-2006)
- Graduate Student Admissions Committee, Department of Plant Pathology (2005-2008)
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News Releases
- Protecting Palouse Legumes from Viral Epidemics by Brian Clark
- Hello Dahlia! by Phil Cable
- In Season: Dahlias by Hannelore Sudermann
- WSU Food and Farm Blog
- Specialty Crops Research Initiative by Kathy Barnard
- Grant helps northwest potato farmers go green by Brian Clark
- WSU President Emeritus Dr. Sam Smith Lecture Series
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