Annual Meeting Program Book - American Phytopathological Society

necator on grape leaves in Michigan. L. L. AVILA
(1), K. L. Powers (2), A. C. Schilder (1). (1) Department
of Plant Pathology, Michigan State University,
East Lansing, MI, U.S.A.; (2) NW Michigan Horticultural
Research Station, Michigan State University,
Traverse City, MI, U.S.A.
P-519 Potential alternative hosts for a powdery mildew on
pea. R. N. ATTANAYAKE (1), D. A. Glawe (2), F.
M. Dugan (3), W. Chen (4). (1) Washington State
University, Pullman, WA, U.S.A.; (2) Washington
State University, and College of Forest Resources,
University of Washington, Seattle, WA, U.S.A. (3)
USDA ARS, Washington State University, Pullman,
WA, U.S.A.; (4) USDA ARS, Pullman, WA, U.S.A.
P-520 Effect of relative humidity on infection of almond
kernels by Aspergillus flavus and A. parasiticus and
levels of aflatoxin contamination. Y. LUO (1), H.
C. Reyes (1), D. P. Morgan (1), T. J. Michailides
(1). (1) Department of Plant Pathology, University
of California-Davis, Kearney Agricultural Center,
Parlier, CA, U.S.A.
P-521 Non-citrus strains of Colletotrichum acutatum
can colonize citrus leaves and produce conidia in
response to citrus flower extracts. S. J. MacKenzie
(1), N. A. PERES (1). (1) University of Florida Gulf
Coast Research and Education Center, Wimauma,
FL, U.S.A.
P-522 Cronartium ribicola on wild Ribes hosts: Rust
severity in local woodland sites shows a site by year
interaction. M. Newcomb (1), C. D. Upper (1),
D. I. ROUSE (1). (1) University of Wisconsin,
Madison, WI, U.S.A.
P-523 Development and use of fluorescent antibody and
qPCR protocols for the electrostatic spore trap. R.
W. SCHNEIDER (1), J. S. Haudenshield (2), G.
L. Hartman (3), W. F. Mahaffee (4). (1) Louisiana
State University, Baton Rouge, LA, U.S.A.; (2)
Department of Crop Sciences, University of
Illinois, Urbana, IL, U.S.A.; (3) US Department of
Agriculture, Agricultural Research Service, Urbana,
IL, U.S.A.; (4) US Department of Agriculture,
Agricultural Research Service, HCRL, Corvallis,
OR, U.S.A.
P-524 Hypovirus mediated recovery of blight infected
American chestnut trees in Michigan. J. C.
SPRINGER (1), A. L. Davelos-Baines (2), A. M.
Jarosz (1). (1) Michigan State University, East Lansing,
MI, U.S.A.; (2) The University of Texas - Pan
American, Edinburg, TX, U.S.A.
P-525 Impact of initial disease levels on development of
strawberry powdery mildew epidemics and the
benefits of clean stock plants. A. STENSVAND (1),
D. M. Gadoury (2), H. Eikemo (1), A. Dobson (1),
C. Heidenreich (2), R. C. Seem (2). (1) Norwegian
Institute for Agricultural and Environmental Research,
Plant Health and Plant Protection Division,
Ås, Norway; (2) Department of Plant Pathology and
Plant-Microbe Biology, New York State Agricultural
Experiment Station, Cornell University, Geneva,
NY, U.S.A.
P-526
flash
&
dash Interaction effects of two biological control
P-527
organisms on resistant and susceptible weed biotypes
of Chondrilla juncea. D. M. CAMPANELLA (1), P.
B. McEvoy (1), C. C. Mundt (1). (1) Oregon State
University, Corvallis, OR, U.S.A.
WITHDRAWN
P-528 Risk of Rhizoctonia web blight development on container-grown
azalea. W. E. COPES (1), H. Scherm (2).
(1) USDA ARS Southern Horticultural Laboratory,
Poplarville, MS, U.S.A.; (2) University of Georgia,
Dept. of Plant Pathology, Athens, GA, U.S.A.
P-529 Association of specific variables with severity of
Asian soybean rust as assessed by GIS analysis at the
field level. E. P. MUMMA (1), R. W. Schneider (1),
C. L. Robertson (1). (1) Louisiana State University,
P-530
P-531
U.S.A.
flash
&
dash Epidemiology of soybean rust (Phakopsora
pachyrhizi) in soybean (Glycine max) sentinel plots
in Florida. H. M. YOUNG (1), J. J. Marois (1),
D. L. Wright (1), D. F. Narvaez (2), G. K. O’Brien
(1). (1) University of Florida/NFREC, Quincy, FL,
U.S.A.; (2) Monsanto, St. Louis, MO, U.S.A.
flash
&
dash A PCR-based approach to characterizing resistance
responses of soft red winter wheat cultivars to
Fusarium graminearum infection.C. LI (1), P. Paul
(2), M. Guttieri (2), L. Madden (2), C. Sneller (2).
(1) Ohio State University, Columbus, OH, U.S.A.;
(2) OARDC, Wooster, OH, U.S.A.
P-532
flash
&
dash Optimization of real time quantitative PCR
(Q-PCR) for Fusarium pseudograminearum and F.
culmorum on wheat. G. J. POOLE (1), F. Ozdemir
(2), S. D. Nydam (1), K. L. Schroeder (3), T. C.
Paulitz (3), J. M. Nicol (4), K. G. Campbell (5).
(1) Washington State University, Pullman, WA,
U.S.A.; (2) Bahri Dagdas International Agricultural
Research Institute, Konya, Turkey; (3) USDA-ARS
Root Disease and Biological Control Research
Unit; (4) CIMMYT (International Maize and
Wheat Improvement Centre) Emek 06511 Ankara,
Turkey; (5) USDA-ARS Wheat Genetics, Quality,
P-533
Physiology and Disease Research Unit
Infection and development of spot blotch and tan
spot on timely and late seeded wheat. S. GURUNG
(1), R. C. Sharma (2), E. Duveiller (3), S. M.
Shrestha (4). (1) North Dakota State University,
Fargo, ND, U.S.A.; (2) ICARDA, Central Asia
and the Caucasus Regional Program, Tashkent,
Uzbekistan; (3) CIMMYT, Global Wheat Program,
Mexico D.F., Mexico; (4) Institute of Agriculture
and Animal Science, Rampur, Nepal
P-534 Effect of temperature and leaf wetness duration on
the infection of wheat leaves by Puccinia striiformis
f. sp. tritici in a controlled environment. M. NITA
(1), R. Eddy (2), R. Bowden (3), E. De Wolf (2).
(1) Virginia Tech, Winchester, VA, U.S.A.; (2)
Kansas State University, Manhattan, KS, U.S.A.; (3)
USDA-ARS, Manhattan, KS, U.S.A.
P-535 Effects of temperature and moisture on the infection
of wheat by Puccinia striiformis f. sp. tritici in an
outdoor environment. R. EDDY (1), E. De Wolf
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