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Kelly L. Ivors
Assistant Professor and Extension Specialist
Appointment: 80% extension, 20% research
B.S. (Bioenvironmental Science), Texas A&M University
M.S. (Plant Pathology), Texas A&M University
Ph.D. (Plant Pathology), The Pennsylvania State University
Activities
General
I am located over 250 miles away from the main campus of NC State
at the Mountain Horticultural
Crops Research and Extension Center in Fletcher, NC. My position
encompasses 80% extension and 20% research responsibilities.
My program focuses on plant pathogens of the diverse agricultural
economy of western North Carolina, which includes vegetables, ornamentals,
burley tobacco and Christmas trees. Applied research and education
are needed to assist growers in production of these high-value crops
in order to enhance the economy of farming. Although the relatively
mild summer temperatures, abundant rainfall, and fertile river bottom
soils of the Southern Appalachian Mountain region are highly favorable
for production of quality crops, this climate is also conducive
to intense disease pressure from numerous economically important
plant pathogens.
Extension
Extension activities include diagnosis of plant samples submitted
to my lab from the western part of North Carolina, publication of
spray
guides and disease
management recommendations for tomatoes, burley tobacco, and
Christmas trees, and monitoring pathogen populations for the development
of fungicide resistance. Detecting fungicide resistance in pathogen
populations helps determine the efficacy of future applications
and gives growers the opportunity to make better management decisions.
Information is disseminated via a variety of formats including the
World Wide Web, formal and informal oral presentations, trade and
scientific journals, newsletters, workshops, and on-farm visits.
Research
An integral part of producing a profitable crop involves proper
disease monitoring and identification, followed by the implementation
of management programs that focus on long-term prevention or suppression
of pathogens. Projects in my lab involve applied and molecular disease
diagnostics and epidemiology, evaluation of fungicides and cultural
control methodologies, and integration of fungicides and host resistance
in management practices. Many of the pathosystems I investigate
involve Phytophthora species, as Phytophthora
affects all major crops that I work on.
Its virulence and ability to spread rapidly throughout the world
establish Phytophthora as one of the most important groups
of plant pathogens. Currently I am involved in a collaborative multi-state
project involving the development of a Phytophthora database.
With the goal of enhancing the ability to detect, diagnose, monitor,
and manage Phytophthora diseases, we aim to build a highly integrative
system that is centered around a genotype and phenotype database,
which will be accessible through the Fungal
Plant Pathogen Database.
For additional information, go to her Mountain
Horticultural Crops Research and Extension web page.
Program Personnel
Selected Publications
- Chandelier, A., Garbelotto, M., Ivors, K. 2006. Validation
of a real time PCR method for the detection of Phytophthora
ramorum. EPPO Bulletin. In press.
- Tyler, B.M., Tripathy, S., Zhang, X., Dehal, P., Jiang, R.,
Aerts, A., Arredondo,F.D., Baxter, L., Bensasson, D., Beynon,
J.L., Chapman, J., Damasceno, C.M.B., Dorrance, A.E., Dou, D.,
Dickerman, A.W., Dubchak, I.L., Garbelotto, M., Gijzen, M.,
Gordon, S.G., Govers, F.G., Grunwald, N.J., Huang, W., Ivors,
K.L., Jones, R.W., Kamoun, S., Krampis, K., Lamour, K.H.,
Lee, M., McDonald, W.H., Medina, M., Meijer, H.J.G., Nordberg,
E.K., Maclean, D.J., Ospina-Giraldo, M.D., Morris, P.F., Phuntumart,
V., Putnam, N.H., Rash, S., Rose, J.K.C., Sakihama, Y., Salamov,
A.A., Savidor, A., Scheuring, C.F., Smith, B.M., Sobral, B.W.S.,
Terry, A., Torto-Alalibo, T.A., Win, J., Xu, Z., Zhang, H.,
Grigoriev, I.V., Rokhsar, D.S., and Boore, J.L. 2006. Phytophthora
genome sequences uncover evolutionary origins and mechanisms
of pathogenesis. Science 313:1261-1266.
- Kang, S., Blair, J.E., Geiser, D.M., Khang, C., Park, S., Gahegan,
M., O'Donnel, K., Luster, D.G., Kim, S.H., Ivors, K.L.,
Lee, Y., Lee, Y., Grunwald, N., Martin, F., Coffey, M.D., Veeraraghavan,
N., and Makalowska, I. 2006. Plant Pathogen Culture Collections:
it takes a village to preserve these resources vital to the
advancement of agricultural security and plant pathology. Phytopathology
96:920-925.
- Hayden, K., Ivors, K., Wilkinson, C., and Garbelotto,
M. 2006. TaqMan chemistry for Phytophthora ramorum detection
and quantification, with a comparison of diagnostic methods. Phytopathology
96:846-854.
- Ivors, K., Garbelotto, M., De Vries, I., Ruyter-Spira,
C., Te Hekkert, B., Rosenweig, N., and Bonants, P. 2006. Microsatellite
markers identify three lineages of Phytophthora ramorum
in US nurseries, yet single lineages in US Forest and European
nursery populations. Molecular Ecology. 15:1493-1505.
- Huberli, D., Ivors, K. L., Smith, A., Tse,
J. G., and Garbelotto, M. 2005. First report of foliar infection
of Matanthemum racemosum by Phtyophthora ramorum.
Plant Dis. 89:204.
- Ivors, K.L. and P.B. Shoemaker. Disease Management.
In: 2005 Burley Guide. pp. 85-105.
- Ivors, K.L. , Hayden, K., Bonants, P.J.M.,
Rizzo, D.M., and Garbelotto, M. 2004. AFLP and phylogenetic analyses
of North American and European populations of Phytophthora
ramorum. Mycol. Res. 108: 378-392.
- Kong, P., Hong, C.X.., Tooley, P.W., Ivors, K.,
Garbelotto, M., and Richardson, P.A. 2004. Rapid identification
of Phytophthora ramorum using PCR-SSCP analysis of ribosomal
DNA ITS-1. Letters Appl. Microbiol. 38:433-439.
- Pinkerton, J. N., Schreiner, R.P., Ivors, K.L.,
and Vasconcelos, M.C. 2004. Effects of Mesocriconema
xenoplax on Vitis vinifera and associated mycorrhical
fungi. Journal of Nematology 36:193-201.
- Ivors, K. and Beyer, D. 2003. Reviewing the
microbiology of commercial mushroom substrate. Mushroom News 51(8):
6-16.
- Hansen, E.M., Reeser, P., Davidson, J.M., Garbelotto, M., Ivors,
K., Douhan, L., and Rizzo, D.M. 2003. Phytophthora
nemorosa, a new species causing cankers and leaf blight of
forest trees in California and Oregon, U.S.A. Mycotaxon 88:129-138.
- Garbelotto, M., Davidson, J. M., Ivors, K.,
Maloney, P. E., Huberli, D., Koike, S. T., and Rizzo, D. M. 2003.
Non-oak native plants are main hosts for sudden oak death pathogen
in California. Cal. Ag. 57(1):18-23.
- Pinkerton, J.N., Ivors, K.L., Reeser, P.W.,
Bristow, P.R., and Windom, G.E. 2002. The use of soil solarization
for the management of soilborne plant pathogens in strawberry
and red raspberry production. Plant Dis. 86:645-651.
- Peachey, R.E., Pinkerton, J.N., Ivors, K.L.,
Miller, M.L., Moore, L.W. 2001. Effect of solarization, cover
crops, and metham on field emergence and survival of buried annual
bluegrass (Poa annua) seeds. Weed Technol. 15:81-88.
- Schreiner, R.P., Ivors, K.L., and Pinkerton,
J.N. 2001. Soil solarization reduces arbuscular mycorrhizal fungi
as a consequence of weed suppression. Mycorrhiza 11:273-277.
- Ivors, K.L., Collopy, P.D., Beyer, D.M., and
Kang, S. 2000. Identification of bacterial microorganisms in mushroom
compost using ribosomal RNA sequence. Comp. Sci. Util. 8(3): 247-253.
- Pinkerton, J.N., Forge, T.A., Ivors, K.L.,
and Ingham, R.E. 1999. Plant-parasitic nematodes associated with
grapevines, Vitis vinifera, in Oregon vineyards. J. Nematology
31:624-634.
- Pinkerton, J.N., Johnson, K.B., Stone, J.K., and Ivors,
K.L. 1998. Factors affecting the release of ascospores
of Anisogramma anomala. Phytopathology 88: 122-128.
- Pinkerton, J.N., Johnson, K.B., Stone, J.K., and Ivors,
K.L. 1998. Maturation and seasonal discharge pattern
of ascospores of Anisogramma anomala. Phytopathology
88:1165-1173.
Professional memberships
- NC Christmas Tree Association
- Blue Ridge Horticultural Society
- American Society for Microbiology (ASM)
- Mycological Society of America (MSA)
- American Phytopathological Society (APS)
Contact Information
Dr. Kelly L. Ivors
NC State University
Mountain Horticultural Crops Research and Extension Center (MHCREC)
455 Research Drive
Mills River, NC 28759
Tel: (828) 684-3562 x 143
Fax: (828) 684-8715
Email: kelly_ivors@ncsu.edu
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