Annual Meeting Program Book - American Phytopathological Society

9:45 a.m. O-151. Effect of type III and type II secretion
on Acidovorax avenae subsp. citrulli colonization
of watermelon seed and seedling tissue. K. L.
JOHNSON (1), G. V. Minsavage (2), R. R.
Walcott (1). (1) University of Georgia, Athens,
GA, U.S.A.; (2) University of Florida, Gainesville,
FL, U.S.A.
10:00 a.m. BREAK
10:15 a.m. O-152. Effect of rootstock genotype on
functional and taxonomic diversity of rhizosphere
communities and endophyte communities of
grapevine in California. S. R. PARKER (1),
D. A. Kluepfel (2). (1) USDA, Agricultural
Research Service, Davis, CA, U.S.A.; (2) USDA,
Agricultural Research Service, Crops Pathology/
Genetics Research Unit, U.S.A.
10:30 a.m. O-153. Culture-independent association of
fungal and oomycete populations with dampingoff
disease incidence in soils. M. Benitez (1),
B. B. MCSPADDEN GARDENER (2). (1)
Biotecnologia, Departamento de Ciencias de la
Vida, Escuela Politécnica del Ejercito, Quito,
Ecuador; (2) Department of Plant Pathology, The
Ohio State University, OARDC, Wooster, OH,
U.S.A.
10:45 a.m. O-154. Caught in the act: A field gone suppressive
for common scab? L. A. WANNER (1),
K. G. Haynes (1). (1) USDA ARS, Beltsville,
MD, U.S.A.
11:00 a.m. O-155. A root rot of soybean (Glycine max)
caused by Phytophthora sansomeana sp nov.
P. REESER (1), E. Hansen (1). (1) Oregon State
University, Corvallis, OR, U.S.A.
11:15 a.m. O-156. Effect of soil texture and fluctuating soil
moisture in carpogenic germination of Sclerotinia
sclerotiorum sclerotia. A. NEPAL (1), L. E. del
Rio Mendoza (1). (1) North Dakota State University,
Fargo, ND, U.S.A.
Vegetable Diseases
8:30 – 11:30 a.m.; A105
Section: Diseases of Plants
Moderators: William Wintermantel, USDA ARS, Salinas,
CA, U.S.A.; Ken Frost, University of Wisconsin,
Madison, WI, U.S.A.
8:30 a.m. O-157. Available nitrogen levels influence
Colletotrichum coccodes infection severity of Russet
Burbank potato roots. B. BLAISDELL (1),
B. Geary (1), J. Morton (1), M. Kearns (1), D.
A. Johnson (2), B. G. Hopkins (1), V. D. Jolley
(1). (1) Brigham Young University, Provo, UT,
U.S.A.; (2) Washington State University, U.S.A.
8:45 a.m. O-158. Infection severity of Colletotrichum coccodes
in Russet Burbank potatoes with respect
to environmental potassium. B. Geary (1), M. J.
KEARNS (1), E. Song (1), B. Blaisedell (1), D. A.
Johnson (1), B. G. Hopkins (1), V. D. Jolley (1).
(1) Brigham Young University, Provo, UT, U.S.A.
9:00 a.m. O-159. Biological and molecular properties of
Potato virus S from late blight resistant potato.
Y. LIN (1), K. Druffel (1), J. L. Whitworth (2),
M. J. Pavek (1), H. Pappu (1). (1) Washington
State University, Pullman, WA, U.S.A.; (2)
USDA-ARS, Aberdeen, ID, U.S.A.
9:15 a.m. O-160. Study of Cucurbit yellow stunting disorder
virus in southern California reveals an expanded
host range including non-cucurbit weed and crop
species. W. M. WINTERMANTEL (1), R. L.
Gilbertson (2), E. T. Natwick (3), L. L. Hladky
(1), A. A. Cortez (1). (1) USDA ARS, Salinas,
CA, U.S.A.; (2) Department of Plant Pathology,
University of California, Davis, CA, U.S.A.; (3)
University of California Desert Research and
Extension Center, Holtville, CA, U.S.A.
9:30 a.m. O-161. A new plant picorna-like virus related to
torrado viruses causes chocolate spot disease of
tomato in Guatemala. Y. KUO (1), O. Batuman
(1), M. L. Palmieri (2), M. R. Rojas (1), R. L.
Gilbertson (1). (1) University of California-
Davis, CA, U.S.A.; (2) University del Valle de,
Guatemala
9:45 a.m. O-162. Refining the aster yellows index in
Wisconsin: Developing sustainable control
tactics for susceptible vegetable crops. K. E.
FROST (1), C. L. Groves (2), R. L. Groves
(2). (1) Department of Plant Pathology,
University of Wisconsin, Madison, WI, U.S.A.;
(2) Department of Entomology, University of
Wisconsin, Madison, WI, U.S.A.
10:00 a.m. BREAK
10:15 a.m. O-163. Investigation of thrips population and
Tomato spotted wilt virus incidence in processing
tomatoes in the Central Valley of California. O.
BATUMAN (1), T. A. Turini (2), M. LeStrange
(3), S. Stoddard (4), G. Miyao (5), D. E. Ullman
(6), R. L. Gilbertson (7). (1) University of
California-Davis, CA, U.S.A.; (2) University of
California Cooperative Extension (UCCE), Fresno
County, U.S.A.; (3) University of California
Cooperative Extension (UCCE), Kings County,
U.S.A.; (4) University of California Cooperative
Extension (UCCE), Merced County; U.S.A. (5)
University of California Cooperative Extension
(UCCE), Yolo County, U.S.A.; (6) Department
of Entomology, University of California-Davis,
CA, U.S.A.; (7) Department of Plant Pathology,
University of California-Davis, CA, U.S.A.
10:30 a.m. O-164. Assessing vegetable producers beliefs
regarding food safety issues. M. L. LEWIS IVEY
(1), S. A. Miller (2), J. T. LeJeune (2). (1) Ohio
State University, Wooster, OH, U.S.A.; (2) Ohio
State University/OARDC, Wooster, OH, U.S.A.
10:45 a.m. O-165. Flower infections with Xanthomonas
campestris pv. campestris can result in internal
seed infection. J. M. VAN DER WOLF (1), P. S.
van der Zouwen (1). (1) Plant Research International,
Wageningen, The Netherlands
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