Alphabetical by section.
Biology of Pathogens
Biology of Bacteria & Viruses
Monday, August 3; 1:00 – 3:30 p.m.; Room C120-122
Moderators: Leonard Nunney, University of California Riverside, Riverside, CA, U.S.A.; Chung-Jan Chang, University of Georgia, Griffin, GA, U.S.A.
1:00 p.m. O-75. Molecular diversity and recombination in a Foveavirus infecting grapevine. O. J. ALABI (1), R. R. Martin (2), R. A. Naidu (1). (1) Department of Plant Pathology, Washington State University, Irrigated Agriculture Research and Extension Center, Prosser, WA, U.S.A.; (2) USDA-ARS Horticultural Crops Research Laboratory, Corvallis, OR, U.S.A.
1:15 p.m. O-76. Grapevine virus Q: The first phytovirus with inverted RdRp motifs. S. SABANADZOVIC (1), N. Abou Ghanem-Sabanadzovic (1). (1) Department of Entomology and Plant Pathology, Mississippi State University, Mississippi State, MS, U.S.A.
1:30 p.m. O-77. Symptoms and distribution of Squash vein yellowing virus in vining cucurbits. C. G. WEBSTER (1), C. S. Kousik (2), W. W. Turechek (1), S. E. Webb (3), S. Adkins (1). (1) USDA ARS, U.S. Horticultural Research Lab, Fort Pierce, FL, U.S.A.; (2) USDA ARS, U.S. Vegetable Lab, Charleston, SC, U.S.A.; (3) University of Florida, Gainesville, FL, U.S.A.
1:45 p.m. O-78. Simultaneous detection and differentiation of Citrus tristeza virus genotypes using a hexaplex reverse transcriptase polymerase chain reaction assay. A. ROY (1), A. Govindarajulu (1), R. Brlansky (1). (1) University of Florida, Lake Alfred, FL, U.S.A.
2:00 p.m. O-79. Draft genome sequence of potato ‘Zebra Chip’ associated bacterium ‘Candidatus Liberibacter solanacearum’. H. LIN (1), H. Doddapaneni (2), C. Chen (3), Y. Duan (4), L. Zhou (5), D. C. Stenger (6), E. L. Civerolo (6). (1) USDA ARS PWA, Parlier, CA, U.S.A.; (2) University of Iowa, Iowa City, IA, U.S.A.; (3) Visitor from Guangxi Citrus Research Center, Guangxi, China; (4) USDA-ARS, Fort Pierce, FL, U.S.A.; (5) University of Florida, Gainesville, FL, U.S.A.; (6) USDA, ARS, Parlier, CA, U.S.A.
2:15 p.m. O-80. Aurantioideae: Phylogeny and susceptibility to Citrus huanglongbing. C. RAMADUGU (1), K. L. Manjunath (2), S. Halbert (3), M. L. Roose (1), R. F. Lee (2). (1) University of California, Riverside, CA, U.S.A.; (2) USDA-ARS, National Clonal Germplasm Repository for Citrus and Dates, Riverside, CA, U.S.A.; (3) Division of Plant Industry, Gainesville, FL, U.S.A.
2:30 p.m. O-81. Central American origin of the bacterial pathogen causing Pierce’s disease of grape. L. NUNNEY (1), X. Yuan (1), R. Bromley (1), J. Hartung (2), M. Montero-Astua (3), R. Stouthamer (1). (1) University of California Riverside, Riverside, CA, U.S.A.; (2) USDA ARS MPPL, Beltsville, MD, U.S.A.; (3) Universidad de Costa Rica, San Pedro, Costa Rica
2:45 p.m. O-82. Regulation of c-di-GMP intracellular levels in X. fastidiosa. V. ANCONA (1), P. de Figueiredo (1). (1) Texas A&M University, College Station, TX, U.S.A.
3:00 p.m. O-83. Xylella fastidiosa strains causing bacterial leaf scorch of blueberry in Georgia are genetically distinct from those causing Pierce’s disease of grape. L. NISSEN (1), T. Denny (2), P. Brannen (2), C. Chang (1). (1) University of Georgia, Griffin, GA, U.S.A.; (2) University of Georgia, Athens, GA, U.S.A.
3:15 p.m. O-84. Effect of minerals on biofilm formation by Xylella fastidiosa. L. DE LA FUENTE (1), P. Cobine (1). (1) Auburn University, Auburn University, AL, U.S.A.
Fungal Biology
Monday, August 3, 8:30 – 11:30 a.m.; C123
Moderators: Patrik Inderbitzin, University of California, Davis, CA, U.S.A.; Nicole Ward, Louisiana State University, Baton Rouge, LA, U.S.A.
8:30 a.m. O-54. Single sequence repeat diversity of Mycosphaerella graminicola populations from California and Kansas. S. GURUNG (1), M. Kabbage (2), W. Bockus (3), T. B. Adhikari (1). (1) North Dakota State University, Fargo, ND, U.S.A.; (2) Texas A&M University, College Station, TX, U.S.A.; (3) Kansas State University, Manhattan, KS, U.S.A.
8:45 a.m. O-55. Somatic hybridization in Puccinia striiformis revealed by virulence patterns and microsatellite markers. P. CHENG (1), X. Chen (2). (1) Department of Plant Pathology, Washington State University, Pullman, WA, U.S.A.; (2) USDA-ARS, Wheat Genetics, Quality, Physiology, and Disease Research Unit and Department of Plant Pathology, Washington State University, Pullman, WA, U.S.A.
9:00 a.m. O-56. Botryosphaeria species from California tree nut crops: Exploration of species limits using multiple genes and isolates from 29 hosts on five continents. P. INDERBITZIN (1). (1) University of California-Davis, CA, U.S.A.
9:15 a.m. O-57. Common and dwarf bunt of wheat: One or three species? X. BAO (1), L. M. Carris (1). (1) Washington State University, Pullman, WA, U.S.A.
9:30 a.m. O-58. Phylogeography of the cotton root rot fungus Phymatotrichopsis omnivore. S. MAREK (1). (1) Oklahoma State University, Stillwater, OK, U.S.A.
9:45 a.m. O-59. WITHDRAWN
10:00 a.m. BREAK
10:15 a.m. O-60. Characterization of a co-inhabitant of uredinia of Asian soybean rust. N. A. WARD (1), R. W. Schneider (1), M. Aime (1). (1) Louisiana State University Agricultural Center, Baton Rouge, LA, U.S.A.
10:30 a.m. O-61. Viability of Phytophthora nicotianae oospores in North Carolina tobacco populations. C. A. GALLUP (1), K. R. Lannon (1), K. L. Ivors (1), H. Shew (1). (1) North Carolina State University, Raleigh, NC, U.S.A.
10:45 a.m. O-62. Soil and stem populations of Phialophora gregata f. sp. sojae following the monoculture of brown stem rot-resistant and susceptible soybean cultivars. T. J. HUGHES (1), N. C. Koval (1), P. D. Esker (1), C. R. Grau (1). (1) University of Wisconsin-Madison, Madison, WI, U.S.A.
11:00 a.m. O-63. Pythium apinafurcum sp. nov.: Its morphology, molecular phylogeny, and infectivity for plants. S. Uzuhashi (1), M. TOJO (2), S. Kobayashi (2), M. Kakishima (1). (1) Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Ibaraki, Japan; (2) Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Osaka, Japan
11:15 a.m. O-64. Systemic infection of sugarcane plants in the Rio Grande Valley of Texas by non-native B and G aflatoxin-producing Aspergillus section Flavi fungi. N. P. GARBER (1), P. J. Cotty (2). (1) University of Arizona, Tucson, AZ, U.S.A.; (2) USDA-ARS, The University of Arizona, Tucson, AZ, U.S.A.
Diseases of Plants
Disease Detection and Diagnosis
Monday, August 3, 8:30 – 11:30 a.m.; A105
Moderator: Thomas Forge, Agric & Agri-Food Canada, Agassiz, BC, Canada
8:30 a.m. O-43. Real-time PCR detection of Puccinia pelargonii-zonalis through greenhouse-grown geraniums. E. A. SCOCCO (1), J. Buck (1), R. Walcott (2). (1) University of Georgia, Griffin, GA, U.S.A.; (2) University of Georgia, Athens, GA, U.S.A.
8:45 a.m. O-44. Resistance evaluation and detection methods of Leifsonia xyli subsp. xyli in sugarcane cultivars. L. RUARO (1), S. R. de Souza (1), E. Daros (1), E. R. de Souto (2), J. C. Bespalhok Filho (1), J. L. Zambon (1), R. C. de Carvalho (3), V. C. Lima Neto (1). (1) Universidade Federal do Paraná, Curitiba, Paraná, Brazil; (2) Universidade Estadual de Marigá, Maringá, Paraná, Brazil; (3) Centro de Diagnóstico Marcus Enrieti/SEAB-PARANÁ
9:00 a.m. O-45. Validation of a single nucleotide polymorphism genotyping method for Wheat streak mosaic virus. S. M. ROGERS (1), J. Carver (2), R. W. Allen (3), U. K. Melcher (1), J. Fletcher (1). (1) Oklahoma State University, Stillwater, OK, U.S.A.; (2) Houston Police Department Crime Lab, Houston, TX, U.S.A.; (3) Oklahoma State University, Tulsa, OK, U.S.A.
9:15 a.m. O-46. Hyperspectral remote sensing for detection of Rhizoctonia crown and root rot in sugar beet. G. J. REYNOLDS (1), C. E. Windels (2), I. V. MacRae (3), S. Laguette (4). (1) University Minnesota, Department Plant Pathology, St. Paul, MN, U.S.A.; (2) University Minnesota, Department Plant Pathology, St. Paul, MN & NW Research & Outreach Center, Crookston, MN, U.S.A.; (3) University Minnesota, Department Entomology, St. Paul, MN & NW Research & Outreach Center, Crookston, MN, U.S.A.; (4) University North Dakota, Department Earth System Sci. & Policy, Grand Forks, ND, U.S.A.
9:30 a.m. O-47. Use of molecular beacons for direct detection of loop-mediated isothermal AMPlification (LAMP) amplicons of the plant pathogen Ralstonia solanacearum. R. KUBOTA (1), G. D. Peckham (1), A. M. Alvarez (1), D. M. Jenkins (1). (1) University of Hawaii at Manoa, Honolulu, HI, U.S.A.
9:45 a.m. O-48. Development and evaluation of detection-based air sampling programs for grapevine powdery mildew in eastern Washington. L. COSTADONE (1), G. G. Grove (1), R. C. Larsen (1). (1) Washington State University, Prosser, WA, U.S.A.
10:00 a.m. BREAK
10:15 a.m. O-49. Rapid detection and quantification of Verticillium dahliae in soil. G. J. BILODEAU (1), P. Uribe (1), F. N. Martin (1). (1) USDA-ARS, Salinas, CA, U.S.A.
10:30 a.m. O-50. Spread, genetic variation, and methods for the detection of Puccinia kuehnii, the causal agent of sugarcane orange rust. N. C. GLYNN (1), L. A. Castlebury (2), L. J. Dixon (2), J. C. Comstock (1). (1) USDA-ARS, Sugarcane Field Station, Canal Point, FL, U.S.A.; (2) USDA ARS Systematic Mycology Laboratory, Beltsville, MD, U.S.A.
10:45 a.m. O-51. Levels of Aspergillus flavus and A. parasiticus in soils of almond orchards. T. J. MICHAILIDES (1), M. A. Doster (2), D. P. Morgan (2), H. Eveillard (3), T. Charbaut (3). (1) University of California, Parlier, CA, U.S.A.; (2) University of California-Davis, Kearney Agricultural Center, Parlier, CA, U.S.A.; (3) Université de Bretagne Occidentale, Brest, France
11:00 a.m. O-52. First report in North America of Paratrichodorus renifer, a nematode parasite of highbush blueberry. T. A. FORGE (1), C. Koch (2), J. N. Pinkerton (3), I. Zasada (3). (1) Agric & Agri-Food Canada, Agassiz, BC, Canada; (2) Agriculture and Agri-Food Canada, Pacific Agri-Food Research Centre, Canada; (3) USDA-ARS, Horticultural Crops Research Laboratory, Corvallis, OR, U.S.A.
11:15 a.m. O-53. Current status of grapevine viruses in Washington State vineyards. T. A. MEKURIA (1), M. J. Soule (1), S. Jarugula (1), R. A. Naidu (1). (1) Washington State University, IAREC, Prosser, WA, U.S.A.
Field Crops
Monday, August 3, 1:00 – 3:30 p.m.; C123
Moderators: Emmanuel Byamukama, Iowa State University, Ames, IA, U.S.A.; Joe Connell, University of California, Davis, CA, U.S.A.
1:00 p.m. O-85. Identification and evaluation of Fusarium species associated with root disease of soybean and corn in Minnesota. J. C. BIENAPFL (1), J. A. Percich (1), D. K. Malvick (1). (1) University of Minnesota, St. Paul, MN, U.S.A.
1:15 p.m. O-86. Influence of temporal separation on the interaction of Meloidogyne incognita and Thielaviopsis basicola on cotton. J. JARABA (1), C. S. Rothrock (1), T. L. Kirkpatrick (2). (1) University of Arkansas, Fayetteville, AR, U.S.A.; (2) Southwest Research & Extension Center (SWREC) University of Arkansas, Hope, AR, U.S.A.
1:30 p.m. O-87. Correlation between anthracnose leaf blight and anthracnose stalk rot as affected by corn residue level. J. C. JIRAK (1), P. D. Esker (1). (1) University of Wisconsin-Madison, Madison, WI, U.S.A.
1:45 p.m. O-88. Maize land races from Mexico harbor resistance to diverse aflatoxin-producing fungi. A. ORTEGA-BELTRAN (1), A. Ortega-Corona (2), M. D. Guerrero-Herrera (2), V. A. Vidal-Martinez (3), P. J. Cotty (4). (1) University of Arizona, Tucson, AZ, U.S.A.; (2) SAGARPA-INIFAP-CIANO, Cd. Obregon, Sonora, Mexico; (3) SAGARPA-INIFAP-CIRNO, Santiago Ixcuintla, Nayarit, Mexico; (4) USDA-ARS, Department of Plant Sciences, University of Arizona, Tucson, AZ, U.S.A.
2:00 p.m. O-89. Evaluation of inoculation methods to assay wheat for resistance to Fusarium crown rot. G. POOLE (1), T. Paulitz (2), J. Nicol (3), G. Erginbas (3), K. Campbell (4), R. R. Smiley (5). (1) Washington State University, Pullman, WA, U.S.A.; (2) USDA/ARS Root Disease Research Unit, U.S.A.; (3) CIMMYT, Ankara, Turkey; (4) USDA-ARS, U.S.A.; (5) Oregon State University, Pendleton OR, U.S.A.
2:15 p.m. O-90. The effects of water on virus titer growth of Wheat streak mosaic virus in hard red winter wheat. J. A. PRICE (1), F. Workneh (2), C. M. Rush (2). (1) Texas AgriLife Research, Amarillo, TX, U.S.A.; (2) Texas AgriLife Research, Bushland, TX, U.S.A.
2:30 p.m. O-91. Triticum mosaic virus: A distinct member of the family Potyviridae with an unusually long leader sequence. S. TATINENI (1), A. D. Ziems (2), S. W. Wegulo (2), R. C. French (1). (1) USDA-ARS, Lincoln, NE, U.S.A.; (2) University of Nebraska, Lincoln, NE, U.S.A.
2:45 p.m. O-92. Abiotic and biotic risk factors associated with Bean pod mottle virus in Iowa. E. BYAMUKAMA (1), A. Robertson (1), F. W. Nutter (1). 1) Iowa State University, Ames, IA, U.S.A.
3:00 p.m. O-93. Determining distribution and prevalence of Fusarium crown rot and common root rot in Montana wheat using real-time qPCR. E. A. MOYA (1), A. Dyer (1), A. Hogg (1), B. J. Jacobsen (1). (1) Montana State University, Bozeman, MT, U.S.A.
3:15 p.m. O-94. Pre-emergence damping off of Beta vulgaris by Rhizopus stolonifer. R. P. NAEGELE (1), L. E. Hanson (2), J. M. McGrath (2). (1) Michigan State University, East Lansing, MI, U.S.A.; (2) USDA-ARS Sugarbeet and Bean Research, Michigan State University, East Lansing, MI, U.S.A.
Forest Pathology
Tuesday, August 4, 1:00 – 3:30 p.m.; A105
Moderators: Jean Berube, Canadian Forest Service, Quebec City, QC, Canada; Brent Oblinger, University of Wisconsin-Madison, Madison, WI, U.S.A.
1:00 p.m. O-188. Early warning system against forest invasive alien fungal species on live plant material. J. A. BERUBE (1). (1) Canadian Forest Service, Quebec City, QC, Canada
1:15 p.m. O-189. Phyllachora “tar spots” on Bauhinia species from the Brazilian Cerrado. J. A. Osorio (1), C. A. Inácio (1), J. C. DIANESE (1). (1) Universidade de Brasília, Brasília, Brazil
1:30 p.m. O-190. White pine blister rust on new telial hosts (Castilleja and Pedicularis) in whitebark pine ecosystems at Mt. Rainier and Crater Lake National Parks. R. MULVEY (1), E. Hansen (1). (1) Oregon State University, Corvallis, OR, U.S.A.
1:45 p.m. O-191. Attempts to naturally regenerate red pine can be threatened by Diplodia shoot blight damage to understory seedlings. B. W. OBLINGER (1), D. R. Smith (1), G. R. Stanosz (1). (1) University of Wisconsin-Madison, Madison, WI, U.S.A.
2:00 p.m. O-192. Diverse and overlapping communities of the Botryosphaeriaceae on native and non-native trees in southern Africa. B. SLIPPERS (1), J. Roux (2), G. Marais (3), B. D. Wingfield (1), D. Pavlic (2), F. Van der Walt (2), H. M. Maleme (2), B. Hinze (2), M. J. Wingfield (4). (1) Department of Genetics, Forestry and Agricultural Biotechnology Institute (FABI), Pretoria, South Africa; (2) Department of Microbiology and Plant Pathology, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, South Africa; (3) CSIR Biosciences and Forestry and Agricultural Biotechnology Institute, Pretoria, South Africa; (4) Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria, South Africa
2:15 p.m. O-193. Black walnut mortality in Colorado caused by the walnut twig beetle and thousand cankers disease. N. TISSERAT (1), W. Cranshaw (1), D. Leatherman (2), C. Utley (1), K. Alexander (3). (1) Colorado State University, Fort Collins, CO, U.S.A.; (2) Colorado State Forestry (retired), Ft. Collins, CO, U.S.A.; (3) Boulder County, Boulder, CO, U.S.A.
2:30 p.m. O-194. Ground-level circumference of loblolly pine saplings is not a significant factor in fusiform rust infection. C. H. WALKINSHAW (1). (1) USDA Forest Service, Pineville, LA, U.S.A.
2:45 p.m. O-195. Evolution of lodgepole pine phytochemical defenses to combat diseases. C. WALLIS (1), R. Reich (2), K. Lewis (1), D. Huber (1). (1) University of Northern British Columbia, Prince George, BC, Canada; (2) BC Ministry of Forests and Range, Prince George, BC, Canada
3:00 p.m. O-196. Loblolly pine decline on Ft. Benning: An analysis of potential underlying causes. H. E. Balbach (1), W. J. OTROSINA (2), P. C. Spaine (2), S. S. Sung (3). , (1) US Army ERDC, Champaign, IL, U.S.A.; (2) USDA Forest Service, Athens, GA, U.S.A.; (3) USDA Forest Service, Pineville, LA, U.S.A.
3:15 p.m. O-197. Assessment of longleaf pine on high-risk and low-risk loblolly pine decline sites at Fort Benning, Georgia. J. W. ZANZOT (1), L. G. Eckhardt (1). (1) Auburn University, Auburn, AL, U.S.A.
Fruit & Nuts
Monday, August 3, 1:00 – 3:30 p.m.; A105
Moderator: Michelle Moyer, Cornell University NYSAES, Geneva, NY, U.S.A.
1:00 p.m. O-95. Simultaneous occurence of bacterial pathogens, Agrobacterium vitis, A. tumefaciens and Xylophilus ampelinus, on the same grapevine and various cultivars. K. BASTAS (1), S. Altinparmak (1). (1) Selcuk University Faculty of Agriculture, Konya, Turkey
1:15 p.m. O-96. Pathogen of apple ring rot and its relation to the pathogen of Botryospharia canker of apple and pear. L. GUO (1), W. Tang (2). (1) China Agricultural University, Beijing, Peoples Republic of China; (2) Plant Pathology Dept., China Agricultural University, Peoples Republic of China
1:30 p.m. O-97. A new member of the family Reoviridae isolated from crumbly fruited ‘Meeker’ red raspberry. D. QUITO (1), W. Jelkmann (2), R. R. Martin (3). (1) Department of Botany and Plant Pathology, Oregon State University, Corvallis, OR, U.S.A.; (2) Julius Kuhn Institut, Dossenheim, Germany; (3) USDA-ARS Horticultural Crops Research Laboratory, Corvallis, OR, U.S.A.
1:45 p.m. O-98. Effects of low temperature events on host susceptibility and on infection, colony development and survival of Erysiphe necator. M. M. MOYER (1), D. M. Gadoury (1), I. B. Dry (2), L. Cadle-Davidson (3), R. C. Seem (1). (1) Cornell University NYSAES, Geneva, NY, U.S.A.; (2) CSIRO Plant Industry, Glen Osmond, SA, Australia; (3) USDA ARS Grape Genetics Research Unit, Geneva, NY, U.S.A.
2:00 p.m. O-99. Fairy ring disease of cranberry: New developments and characterization of the causal agent. J. J. POLASHOCK (1), J. Vaiciunas (2), P. V. Oudemans (2). (1) USDA ARS, Chatsworth, NJ, U.S.A.; (2) Rutgers University, U.S.A.
2:15 p.m. O-100. Identification and pathogenicity of Botryosphaeria species associated with avocado branch dieback and trunk canker in California. V. T. McDonald (1), S. C. Lynch (1), A. ESKALEN (1). (1) University of California, Riverside, CA, U.S.A.
2:30 p.m. O-101. Biology and sources of inoculum of Geotrichum candidum causing sour rot of peaches and nectarines in California. M. A. YAGHMOUR (1), R. M. Bostock (1), J. E. Adaskaveg (2), T. J. Michailides (1). (1) University of California, Davis, CA, U.S.A.; (2) University of California, Riverside, CA, U.S.A.
2:45 p.m. O-102. Appressorium formation and growth of Colletotrichum acutatum at different temperatures and stages of blueberry fruit development. T. D. MILES (1), A. C. Schilder (1). (1) Department of Plant Pathology, Michigan State University, East Lansing, MI, U.S.A.
3:00 p.m. O-103. Seed-borne and systemic populations of Agrobacterium tumefaciens as sources of inoculum for crown gall development on PARADOX walnut rootstock. L. E. YAKABE (1), S. R. Parker (2), A. E. McClean (2), M. M. Maccree (2), 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.
3:15 p.m. O104. Etiology and management of sour rot in vineyards in Ontario, Canada. W. MCFADDEN-SMITH (1), D. Inglis (2). (1) Ontario Ministry of Agriculture, Vineland Station, ON, Canada; (2) Brock University, St. Catharines, ON, Canada, dinglis@brocku.ca
Turf, Ornamental, & Fruit Diseases
Wednesday, August 5, 8:30 – 11:30 a.m.; C123
Moderators: Dilip Kumar Lakshman, USDA ARS, Beltsville, MD, U.S.A.; Christie Almeyda, Washington State University, Pullman, WA, U.S.A.
8:30 a.m. O-238. Development of a chitinase assay for tall fescue challenged with Rhizoctonia solani. M. A. CUTULLE (1), B. Horvath (1), D. McCall (1), J. Derr (2). (1) Virginia Tech, Ellicott City, MD, U.S.A.; (2) Virginia Tech, Virginia Beach, VA, U.S.A.
8:45 a.m. O-239. A new Rhizoctonia sp. pathogenic to seashore paspalum turfgrass. S. KAMMERER (1), P. F. Harmon (2). (1) University of Florida, Saint Augustine, FL, U.S.A.; (2) University of Florida, Gainesville, FL, U.S.A.
9:00 a.m. O-240. Analysis of ribosomal DNA-ITS region for grouping of Rhizoctonia species isolated from turfgrass in Maryland and Virginia. B. S. AMARADASA (1), B. Horvath (1), D. K. Lakshman (2), S. E. Warnke (2). (1) Virginia Tech., Blacksburg, VA, U.S.A.; (2) USDA-ARS FNPRU, Beltsville, MD, U.S.A.
9:15 a.m. O-241. Multilocus sequence analysis of Sclerotinia homoeocarpa populations from turfgrasses. T. A. TAYLOR (1), I. Carbone (1), L. P. Tredway (1). (1) North Carolina State University, Raleigh, NC, U.S.A.
9:30 a.m. O-242. Effects of soil temperature on Sclerotinia homoeocarpa growth, survival, and pathogenicity. C. WILSON (1), J. Kerns (1). (1) University of Wisconsin-Madison, Madison, WI, U.S.A.
9:45 a.m. O-243. Genetic diversity of endogenous plant pararetorival sequences associated with dahlia mosaic from geographically diverse sources of dahlia. C. V. ALMEYDA (1), K. L. Druffel (1), M. Samuitiene (2), H. R. Pappu (1). (1) Washington State University, Pullman, WA, U.S.A.; (2) Vilnius University, Vilnius, Lithuania
10:00 a.m. BREAK
10:15 a.m. O-244. Para-retroviral sequences in wild Dahlia spp. in natural habitats from the Mexican mountain ranges. S. EID (1), K. Druffel (1), D. Saar (2), H. Pappu (1). (1) Washington State University, Pullman, WA, U.S.A.; (2) Department of Biological Sciences, Murray State University, Murray, KY, U.S.A.
10:30 a.m. O-245. Molecular variability of Grapevine fanleaf virus in Washington State vineyards. L. R. GUTHA (1), T. A. Mekuria (1), R. R. Martin (2), N. A. Rayapati (1). (1) Washington State University, Prosser, WA, U.S.A.; (2) USDA-ARS Horticulture Crops Research Laboratory, Corvallis, OR, U.S.A.
11:00 a.m. O-246. Prevalence and severity of Tomato ringspot nepovirus in a commercial apple orchard in York County, Pennsylvania. W. MSIKITA (1), A. Jacob (2), F. Fofanah (2). (1) Pennsylvania Department of Agric, Harrisburg, PA, U.S.A.; (2) Harrisburg University of Science and Technology, Harrisburg, PA, U.S.A.
11:15 a.m. O-247. Sequence analysis of the genes of two isolates of grapevine leafroll-associated viruses from Liaoning Province in China. M. Wang (1), F. Fei (1), T. Zhou (2), Y. CHENG (3), Z. Fan (2). (1) Department of Pomology, China Agricultural University, Beijing, China; (2) Department of Plant Pathology, China Agricultural University, Beijing, China; (3) China Agricultural University, Beijing, Peoples Rep of China
Vegetable Diseases
Tuesday, August 4, 8:30 – 11:30 a.m.; A105
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) UC Davis, 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
11:00 a.m. O-166. Determination of prevalence of Potato yellow vein virus (PYVV) in crops of Solanum phureja in three states of Colombia by symptom detection and RT-PCR. L. FRANCO-LARA (1), D. Rodriguez (1), M. Guzman (2). (1) Universidad Militar Nueva Granada, Bogota, Colombia; (2) Instituto de Biotecnología, Universidad Nacional de Colombia, Bogotá-Colombia
11:15 a.m. O-167. New biovar 3 Dickeya spp. strain (syn. Erwinia chrysanthemi) as a causative agent of blackleg in seed potato in Europe. R. CZAJKOWSKI (1), J. A. van Veen (2), J. M. van der Wolf (1). (1) Plant Research International, Wageningen, The Netherlands; (2) Netherlands Instituut voor Ecologie, Heteren, The Netherlands/Institute of Biology, Leiden University, Leiden, The Netherlands
Epidemiology/Ecology/Environmental Biology
Pathogen-Vector Interactions
Wednesday, August 5, 8:30 – 11:15 a.m.; A105
Moderators: William Turechek, USDA ARS, U.S. Horticultural Research Lab, Fort Pierce, FL, U.S.A.; Susan Sim, University of California, Davis, CA, U.S.A.
8:30 a.m. O-228. Spatial colonization of Xylella fastidiosa in the foregut of glassy-winged sharpshooter supports two types of egestion in the inoculation mechanism. E. A. BACKUS (1). (1) USDA Agricultural Research Service, Parlier, CA, U.S.A.
8:45 a.m. O-229. Role of ‘Candidatus Liberibacter’-infected seed tubers in epidemiology of potato zebra chip. D. HENNE (1), F. Workneh (1), N. Gudmestad (2), C. Rush (1). (1) Texas AgriLife Research, Amarillo, TX, U.S.A.; (2) Department of Plant Pathology, North Dakota State University, Fargo, ND, U.S.A.
9:00 a.m. O-230. Detection of potential reservoirs of Tomato spotted wilt virus by PCR analysis of crushed western flower thrips (Frankliniella occidentalis). C. NISCHWITZ (1), S. Mullis (2), K. Lewis (2), R. Gitaitis (2). (1) University of Arizona, Tucson, AZ, U.S.A.; (2) University of Georgia, Department of Plant Pathology, Coastal Plain Experiment Station, Tifton, GA, U.S.A.
9:15 a.m. O-231. Lack of Pythium aphanidermatum transmission by adult fungus gnats (Bradysia impatiens) and investigation of larval vectoring capacity. S. E. BRAUN (1), L. A. Castrillo (1), J. P. Sanderson (1), M. L. Daughtrey (2), S. P. Wraight (3). (1) Department of Entomology, Cornell University, Ithaca, NY, U.S.A.; (2) Department of Plant Pathology and Plant-Microbe Biology, Cornell University, Ithaca, NY, U.S.A.; (3) USDA-ARS, Robert W. Holley Center for Agriculture & Health, Ithaca, NY, U.S.A.
9:30 a.m. O-232. Survey of barley yellow dwarf vectors in Alabama and the Panhandle of Florida. B. A. HADI (1), K. Flanders (1), J. Murphy (1), K. Bowen (1). (1) Auburn University, Auburn, AL, U.S.A.
9:45 a.m. O-233. Epidemiological analysis of multi-virus infections of watermelon in experimental fields in southwest Florida. W. W. TURECHEK (1), S. Adkins (1), C. S. Kousik (2), C. G. Webster (1), P. A. Stansly (3), P. D. Roberts (3). (1) USDA ARS, U.S. Horticultural Research Lab, Fort Pierce, FL, U.S.A.; (2) USDA-ARS, U.S. Vegetable Lab, Charleston, SC, U.S.A.; (3) University of Florida, SWFREC, Immokalee, FL, U.S.A.
10:00 a.m. BREAK
10:15 a.m. O-234. Investigation of the southern green stink bug (Nezara viridula L.) vector potential using bacterial and fungal cotton pathogens. E. G. MEDRANO (1), J. F. Esquivel (1), A. A. Bell (1). (1) USDA ARS SPARC, College Station, TX, U.S.A.
10:30 a.m. O-235. Beet black scorch virus in Iran is more diverse than anywhere. M. MERHVAR (1), C. Bragard (2). (1) Université catholique de Louvain, Unité de phytopathologie, Louvain-la-Neuve, Belgium & Ferdowsi University of Mashhad, Mashhad, Iran; (2) Université catholique de Louvain, Unité de phytopathologie, Louvain-la-Neuve, Belgium
10:45 a.m. O-236. Rapid spread of leafroll disease in Cabernet Sauvignon grapevines in Napa Valley, California. D. A. GOLINO (1), E. Weber (1), S. T. Sim (1), A. Rowhani (1). (1) University of California, Davis, CA, U.S.A.
11:00 a.m. O-237. Transmission ecology of Grapevine leafroll-associated virus 3. C. TSAI (1), K. M. Daane (2), D. Bosco (3), R. P. Almeida (2). (1) University of California, Berkeley, CA, U.S.A. and National Taiwan University, Taipei, Taiwan; (2) University of California, Berkeley, CA, U.S.A.; (3) Univ degli Studi di Torino, Grugliasco (TO), Italy
Phyllosphere/Rhizosphere Ecology
Tuesday, August 4, 8:30 – 11:30 a.m.; C124
Moderators: Rachel Melnick, Pennsylvania State University, University Park, PA, U.S.A.; Leslie Wanner, USDA ARS, Beltsville, MD, U.S.A.
8:30 a.m. O-146. Characterization of a naturally occurred suppressive soil to potato common scab in Michigan. Q. MENG (1), J. Yin (2), R. Hammerschmidt (1), W. Kirk (1), J. Hao (1). (1) Michigan State University, East Lansing, MI, U.S.A.; (2) University of Georgia, U.S.A.
8:45 a.m. O-147. Effect of soil temperature and plant age on root rot and foliar symptoms of soybean sudden death syndrome. C. GONGORA (1), L. Leandro (1). (1) Iowa State University, Ames, IA, U.S.A.
9:00 a.m. O-148. Impact of application of endophytic Bacillus spp. for biocontrol of cacao diseases on native microbial communities. R. L. MELNICK (1), C. Suárez-Capello (2), B. A. Bailey (3), K. Solis (2), P. A. Backman (1). (1) Pennsylvania State University, University Park, PA, U.S.A.; (2) Instituto Nacional de Investigaciones Agropecuarias, Estación Experimental Tropical Pichilingue, Quevedo, Los Rios, Ecuador; (3) Sustainable Perennial Crop Lab, USDA-ARS, Beltsville, MD, U.S.A.
9:15 a.m. O-149. Comparison of aflatoxigenicity of corn kernel and soil populations of Aspergillus flavus. R. R. SWEANY (1), K. E. Damann (1). (1) Louisiana State University Agricultural Center, Baton Rouge, LA, U.S.A.
9:30 a.m. O-150. Induced resistance in flowers and its effectiveness in suppressing flower-infecting fungi. S. THOMAS (1), H. Scherm (1). (1) University of Georgia, Athens, GA, U.S.A.
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 damping-off 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.
Population Genetics
Monday, August 3, 1:00 – 3:30 p.m.; B117-119
Moderators: Matthew Rouse, University of Minnesota, St. Paul, MN, U.S.A.; Kendra Baumgartner, USDA ARS, Davis, CA, U.S.A.
1:00 p.m. O-114. Pathogenic and genetic diversity of Alternaria alternata isolates from tangerine hybrids of Iran, based on RAPD-PCR technique. N. KAKVAN (1), H. Zamanizadeh (1), S. Hajmansoor (1), H. Taheri (2), B. Morid (1). (1) Science and Research Branch, Islamic Azad University, Tehran, Iran; (2) Citrus Research Institute, Ramsar, Iran
1:15 p.m. O-115. Genetic diversity of Sclerotinia trifoliorum infecting chickpea based on mycelial compatibility grouping, rDNA introns and multi-locus haplotypes. E. N. NJAMBERE (1), G. Vandemark (2), W. Chen (2). (1) Washington State University, Pullman, WA, U.S.A.; (2) USDA ARS, Washington State University, Pullman, WA, U.S.A.
1:30 p.m. O-116. Diverse stem rust races found in a single field in Washington, U.S.A. M. N. ROUSE (1), S. Stoxen (1), X. Chen (2), L. J. Szabo (3), Y. Jin (3). (1) University of Minnesota, St. Paul, MN, U.S.A.; (2) USDA-ARS Wheat Genetics, Quality, Physiology, and Disease Research Unit, Pullman, WA, U.S.A.; (3) USDA-ARS Cereal Disease Laboratory, St. Paul, MN, U.S.A.
1:45 p.m. O-117. DNA barcoding of Septoria species from leaf spots and stem cankers of poplar in British Columbia, Canada to assess risk of spread. R. C. HAMELIN (1), N. Feau (2), C. K. Tsui (3), H. Kope (4), S. Zeglen (4). (1) NRC Canada Forest Service, Ste-Foy, QC, Canada; (2) Department of Forest Science, University of British Columbia, Vancouver, BC, Canada; (3) Department of Forest Science, University of British Columbia, Vancouver, BC, Canada, clementsui@gmail.com; (4) BC Ministry of Forest and Range, Canada
2:00 p.m. O-118. Limited population structure of Armillaria mellea throughout coastal California suggests gene flow through basidiospore dispersal. K. BAUMGARTNER (1), P. Fujiyoshi (1), S. Bergemann (2), R. Travadon (3). (1) USDA ARS, Davis, CA, U.S.A.; (2) Middle Tennessee State University, Biology Department, Murfreesboro, TN, U.S.A.; (3) Department of Plant Pathology, University of California, Davis, CA, U.S.A.
2:15 p.m. O-119. Population structure and diversity of Eutypa lata from Mediterranean grape-growing regions. T. RENAUD (1), K. Baumgartner (2), P. Rolshausen (3), M. R. Sosnowski (4), F. Trouillas (1), D. Gubler (1). (1) Department of Plant Pathology, University of California, Davis, CA, U.S.A.; (2) USDA ARS, Davis, CA, U.S.A.; (3) University of California, Riverside, CA, U.S.A.; (4) South Australian Research and Development Institute, Adelaide, SA, Australia
2:30 p.m. O-120. Genetic variability of RNA1 and RNA2 within Grapevine fanleaf virus isolates in three naturally infected California vineyards. J. E. OLIVER (1), M. Fuchs (1). (1) Cornell University NYSAES, Geneva, NY, U.S.A.
2:45 p.m. O-121. Variation within the NA1 clonal lineage of Phytophthora ramorum from U.S. nurseries reveals migration pathways. E. M. GOSS (1), M. Larsen (1), G. A. Chastagner (2), D. R. Givens (3), N. J. Grunwald (1). (1) USDA ARS, Corvallis, OR, U.S.A.; (2) Washington State University, Puyallup, WA, U.S.A.; (3) USDA APHIS PPQ, Fort Collins, CO, U.S.A.
3:00 p.m. O-122. Evolutionary epidemiology of Beet necrotic yellow vein virus (BNYVV) in North America. R. ACOSTA-LEAL (1), C. M. Rush (1). (1) AgriLife Research, Amarillo, TX, U.S.A.
3:15 p.m. O-123. Phenotypic plasticity, fitness and multilocus genotypes of Phytophthora ramorum populations in southern Oregon tanoak forests. J. BRITT (1), E. Hansen (1). (1) Oregon State University, Corvallis, OR, U.S.A.
Quantitative Epidemiology
Sunday, August 2, 1:00 – 4:00 p.m.; C120-122
Moderators: Leah Granke, Michigan State University, East Lansing, MI, U.S.A.; Alissa Kriss, Ohio State University, Wooster, OH, U.S.A.
1:00 p.m. O-32. Effects of post-dew period temperature on Phakopsora pachyrhizi urediniospore production on soybean. M. R. BONDE (1), S. E. Nester (1), D. K. Berner (1). (1) USDA ARS, Frederick, MD, U.S.A.
1:15 p.m. O-33. Prediction models for potential yield losses caused by wheat stripe rust in the U.S. Pacific Northwest. D. SHARMA-POUDYAL (1), X. Chen (2). (1) Department of Plant Pathology, Washington State University, Pullman, WA, U.S.A.; (2) USDA-ARS and Department of Plant Pathology, Washington State University, Pullman, WA, U.S.A.
1:30 p.m. O-34. More than 40 years of observations from Ohio confirm the importance of relative humidity and precipitation for Fusarium head blight epidemics. A. B. KRISS (1), L. V. Madden (1), P. A. Paul (1). (1) Ohio State University, OARDC, Wooster, OH, U.S.A.
1:45 p.m. O-35. Association between post-anthesis infection and deoxynivalenol accumulation in grain from spikes without visual symptoms of Fusarium head blight. K. J. ODENBACH (1), M. J. Guttieri (1), C. H. Sneller (1), L. V. Madden (1), P. A. Paul (1). (1) Ohio State University - OARDC, Wooster, OH, U.S.A.
2:00 p.m. O-36. Three-dimensional spatial patterns of brown rot symptoms within sour cherry tree canopies in Hungary. S. E. EVERHART (1), H. Scherm (1), A. Askew (2), L. Seymour (2), I. J. Holb (3). (1) Department of Plant Pathology, University of Georgia, Athens, GA, U.S.A.; (2) Department of Statistics, University of Georgia, Athens, GA, U.S.A.; (3) Centre of Agricultural Sciences, University of Debrecen, Debrecen, Hungary
2:15 p.m. O-37. Comparative epidemiology of Phytophthora ramorum and other Phytophthora species. C. R. ELLIOTT (1), V. McDonald (1), K. A. Henslee (2), N. J. Grunwald (2). (1) Department of Botany and Plant Pathology, Oregon State University, Corvallis, OR, U.S.A.; (2) Horticultural Crops Research Laboratory, USDA ARS, Corvallis, OR, U.S.A.
2:30 p.m. BREAK
2:45 p.m. O-38. Does the Horsfall-Barratt scale for disease severity estimation affect our ability to test for treatment differences? C. H. BOCK (1), T. R. Gottwald (2), P. E. Parker (3), F. J. Ferrandino (4), S. J. Welham (5), F. Van den Bosch (5), S. Parnell (5). (1) University of Florida/USDA-ARS-USHRL, Fort Pierce, FL, U.S.A.; (2) USDA-ARS-USHRL, Fort Pierce, FL, U.S.A.; (3) USDA-APHIS-PPQ, Moore Air Base, Edinburg, TX, U.S.A.; (4) Department of Plant Pathology and Ecology, Connecticut, Agricultural Experiment Station, New Haven, CT, U.S.A.; (5) Rothamsted Research, Harpenden, Herts., England, United Kingdom
3:00 p.m. O-39. Logistic regression modeling of dollar spot epidemics using weather variables as inputs. D. L. SMITH (1), A. F. Payne (1), N. R. Walker (1). (1) Oklahoma State University, Stillwater, OK, U.S.A.
3:15 p.m. O-40. Dispersal and movement mechanisms of Phytophthora capsici sporangia. L. GRANKE (1), S. T. Windstam (2), H. C. Hoch (3), C. D. Smart (3), M. K. Hausbeck (2). (1) Michigan State University, East Lansing, MI, U.S.A.; (2) Department of Plant Pathology, Michigan State University, East Lansing, MI, U.S.A.; (3) Department of Plant Pathology and Plant-Microbe Biology, NYSAES, Geneva, NY, U.S.A.
3:30 p.m. O-41. Effect of plant age and leaf maturity on the susceptibility to soybean rust caused by Phakospora pachyrhizi.. P. SRIVASTAVA (1), J. Marois (1), L. Leandro (2), D. Wright (3), D. R. Walker (4). (1) Department of Plant Pathology, NFREC, University of Florida, Quincy, FL, U.S.A.; (2) Department of Plant Pathology, Iowa State University, Ames, IA, U.S.A.; (3) Department of Agronomy, NFREC, University of Florida, Quincy, FL, U.S.A.; (4) USDA, 232 National Soybean Research Center, Urbana, IL, U.S.A.
3:45 p.m. O-42. Effect of cultivar on the relationship between Fusarium head blight severity and deoxynivalenol concentration in winter wheat. J. HERNANDEZ NOPSA (1), S. N. Wegulo (1). (1) University of Nebraska, Lincoln, NE, U.S.A.
Biology of Viruses
Tuesday, August 4, 8:30 – 11:30 a.m.; A106
Moderators: Carlos Angel, University of Missouri, Columbia, MO, U.S.A.; Rosemarie Hammond, USDA ARS, Beltsville, MD, U.S.A.
8:30 a.m. O-124. Self-assembly of Maize rayado fino virus particles in bacteria and in plants: Towards an understanding of Marafivirus gene expression and biology. R. W. HAMMOND (1). (1) USDA ARS, Beltsville, MD, U.S.A.
8:45 a.m. O-125. GFP expression from a biologically active minireplicon of Sonchus yellow net virus. U. GANESAN (1), J. N. Bragg (2), M. Deng (1), S. Marr (1), A. O. Jackson (1). (1) UC Berkeley, Berkeley, CA, U.S.A.; (2) USDA, ARS, Western Regional Research Center, Albany, CA, U.S.A.
9:00 a.m. O-126. Experimental evolution of an avirulent Soybean mosaic virus toward virulence on Rsv1-soybeans imitates mutations selected through natural evolution. M. R. HAJIMORAD (1), R. Wen (1), A. L. Eggenberger (2), J. H. Hill (2), M. A. Saghai Maroof (3). (1) University of Tennessee, Knoxville, TN, U.S.A.; (2) Iowa State University, Ames, IA, U.S.A.; (3) Virginia Tech, Blacksburg, VA, U.S.A.
9:15 a.m. O-127. Behavior of the triple gene block proteins of Alternanthera mosaic virus differs from those of Potato virus X. H. Lim (1), A. Vaira (2), H. Bae (3), J. N. Bragg (4), S. E. Ruzin (5), J. HAMMOND (6). (1) USDA-ARS, USNA, FNPRU, Beltsville, MD, U.S.A.; (2) CNR, IVV, Torino 10135, Italy; (3) USDA-ARS, PSI, SPCL, Beltsville, MD, U.S.A.; (4) USDA-ARS, WRRC, Albany, CA, U.S.A.; (5) University of California, CNR, Berkeley, CA, U.S.A.; (6) USDA ARS FNPRU, Beltsville, MD, U.S.A.
9:30 a.m. O-128. Oleic acid levels modulate defense signaling by regulating expression of resistance genes. M. MANDAL (1), S. Zhu (1), Q. Gao (1), Y. Xia (1), R. Jeong (1), K. Yu (1), S. Venugopal (1), L. Lapchyk (1), A. Kachroo (1), P. Kachroo (1). (1) University of Kentucky, Lexington, KY, U.S.A.
9:45 a.m. O-129. GmRAR1 and GmSGT1-2 participate in various modes of soybean immunity against microbial pathogens. D. FU (1), S. Ghabrial (1), A. Kachroo (1). (1) University of Kentucky, Lexington, KY, U.S.A.
10:00 a.m. BREAK
10:15 a.m. O-130. Investigation of tissue tropism of curtoviruses in the plant and the beet leafhopper vector. L. CHEN (1), R. L. Gilbertson (1). , (1) University of California, Davis, CA, U.S.A.
10:30 a.m. O-131. Nicotiana benthamiana as a model plant to study aphid transmission of plant viruses. A. V. KARASEV (1), A. R. Poplawsky (1), B. S. Blades (1), M. Dibble (1), H. Ding (1), V. V. Dolja (2), S. D. Eigenbrode (1). (1) University of Idaho, Moscow, ID, U.S.A.; (2) Oregon State University, U.S.A.
10:45 a.m. O-132. A hypersensitive response in Nicotiana species within the Alatae section is elicited by the Tomato bushy stunt virus coat protein p41 gene. C. A. ANGEL (1), J. E. Schoelz (1). (1) Division of Plant Sciences, University of Missouri, Columbia, MO, U.S.A.
11:00 a.m. O-133. Characterization of Tomato spotted wilt virus NSm protein domains involved in tubule formation, movement, and symptoms. W. Li (1), D. J. Lewandowski (2), M. E. Hilf (3), S. ADKINS (3). (1) University of Florida, CREC, Lake Alfred, FL, U.S.A.; (2) Ohio State University, Columbus, OH, U.S.A.; (3) USDA-ARS, Fort Pierce, FL, U.S.A.
11:15 a.m. O-134. Tomato bushy stunt virus inoculation of roots versus leaves reveals differential effects by the coat protein and the P19 silencing suppressor. S. A. MANABAYEVA (1), M. Shamekova (1), Y. Hsieh (1), R. T. Omarov (1), H. B. Scholthof (1). (1) Texas A&M University, College Station, TX, U.S.A.
Molecular Biology – Fungi
Sunday, August 2, 1:00 – 4:00 p.m.; C123
Moderators: Harold Corby Kistler, University of Minnesota, St. Paul, MN, U.S.A.; Steven Klosterman, USDA ARS, Salinas, CA, U.S.A.
1:00 p.m. O-21. Comparison of protein profiles between light- and dark-grown Cercospora kikuchii. A. K. CHANDA (1), Z. Chen (1), R. W. Schneider (1). (1) Louisiana State University AgCenter, Baton Rouge, LA, U.S.A.
1:15 p.m. O-22. A soybean leucine-rich repeat receptor-like kinase regulates the response to infection with Phytophothora sojae. M. H. EL-HABBAK (1), A. Padmanaban (1), S. Ghabrial (1). (1) University of Kentucky, Lexington, KY, U.S.A.
1:30 p.m. O-23. Targeted lignin modification confers tolerance to fungal pathogens in alfalfa. S. UPPALAPATI (1), W. Li (1), I. Yasuhiro (1), L. W. Sumner (1), R. A. Dixon (1), K. S. Mysore (1). (1) The Samuel Roberts Noble Foundation, Ardmore, OK, U.S.A.
1:45 p.m. O-24. Corresponding metabolic reactions in host and pathogen modulate opposing functions of defense and virulence. B. Chanda (1), P. Dotson (2), S. Kentaro (1), Q. Gao (1), S. Kulshrestha (1), S. Venugopal (1), D. Navarre (2), A. Kachroo (1), L. Vaillancourt (1), P. KACHROO (1). (1) University of Kentucky, Lexington, KY, U.S.A.; (2) USDA-ARS, Prosser, WA, U.S.A.
2:00 p.m. O-25. Regulatory control of the Fusarium graminearum transcriptome in wheat and rice. J. Menke (1), Y. Dong (1), H. KISTLER (1). (1) University of Minnesota, St. Paul, MN, U.S.A.
2:15 p.m. O-26. Identification of lettuce genes differentially expressed in a Verticillium dahliae-lettuce interaction by suppression subtractive hybridization. S. J. KLOSTERMAN (1), A. Anchieta (1), K. Maruthachalam (2), R. J. Hayes (1), K. V. Subbarao (2). (1) USDA ARS, Salinas, CA, U.S.A.; (2) University of California-Davis, CA, U.S.A.
2:30 p.m. BREAK
2:45 p.m. O-27. Fusarium comparative genomics reveals genetic plasticity and pathogenicity development. L. MA (1). (1) Broad Institute, Cambridge, MA, U.S.A.
3:00 p.m. O-28. Root-expressed Carica papaya genes regulated by Phytophthora palmivora: A promising new system for comparative genomics of Phytophthora-plant interaction. B. PORTER (1), J. Zhu (2), D. Christopher (1). (1) University of Hawaii, Honolulu, HI, U.S.A.; (2) Hawaii Agriculture Research Center, Aiea, HI, U.S.A.
3:15 p.m. O-29. Development of a transformation system in the swainsonine-producing fungi, Undifilum oxytropis. S. MUKHERJEE (1), R. Creamer (1). (1) New Mexico State University, Las Cruces, NM, U.S.A.
3:30 p.m. O-30. Understanding interactions between phytopathogenic Phytophthora effector IpiO and the host resistance protein RB. D. HALTERMAN (1), Y. Chen (2). (1) USDA/ARS, Madison, WI, U.S.A.; (2) University of Wisconsin-Madison, Madison, WI, U.S.A.
3:45 p.m. O-31. Another ‘extracellular polysaccharide’ functioning in plant defense: Role of structural DNA in border cell-mediated defense of the legume root tip. F. Wen (1), G. White (1), H. D. Van Etten (1), Z. Xiong (1), M. C. HAWES (1). (1) University of Arizona, Tucson, AZ, U.S.A.
Molecular Biology – Fungi
Tuesday, August 4, 1:00 – 3:30 p.m.; C123
Moderators: Lee Hadwiger, Washington State University, Pullman, WA, U.S.A.; Osman Radwan, University of Illinois, Urbana, IL, U.S.A.
1:00 p.m. O-198. Victoriocin, a novel broad-spectrum antifungal protein secreted by virus-infected Helminthosporium victoriae isolates. P. B. DE SÁ (1), W. M. Havens (1), H. Li (1), S. A. Ghabrial (1). (1) University of Kentucky, Lexington, KY, U.S.A.
1:15 p.m. O-199. Non-host disease resistance: Signals and nuclear protein changes associated with the activation of pea PR genes. L. A. HADWIGER (1), K. Druffel (1). (1) Washington State University, Pullman, WA, U.S.A.
1:30 p.m. O-200. Soybean root defense responses to Fusarium virguliforme infection reveals a role of defense related genes during resistance. O. RADWAN (1), S. J. Clough (2). (1) University of Illinois, Urbana, IL, U.S.A.; (2) University of Illinois, Department of Crop Science, Urbana, IL, U.S.A. and USDA, Urbana, IL, U.S.A.
1:45 p.m. O-201. The role of necrosis and infection inducing compounds by germinating spores of Botrytis cinerea in pathogenesis. N. KHANAM (1), Y. Narusaka (2), H. Yoshioka (3), K. Toyoda (1), T. Shiraishi (1). (1) Okayama University, Okayama, Japan; (2) RIBS Okayama, Okayama, Japan; (3) Nagoya University, Nagoya, Japan
2:00 p.m. O-202. Dynamics of rice blast resistance genes in the Pik cluster and molecular dissection of the Pik-p gene. B. Yuan (1), X. Xu (1), X. Zeng (1), H. Hu (1), C. Zhai (1), F. Lin (1), L. Wang (1), Q. PAN (2). (1) Laboratory of Plant Resistance and Genetics, College of Natural Resources & Environment, South China Agricultural University, Guangzhou, China; (2) South China Agricultural University, Guangzhou, Guangdong, Peoples Republic of China
2:15 p.m. O-203. Epichloë endophytes from cool season grass germplasm. C. YOUNG (1), S. Mittal (1), L. Trammell (1), A. Hopkins (1). (1) The Samuel Roberts Noble Foundation, Ardmore, OK, U.S.A.
2:30 p.m. O-204. RAPD marker as a criterion to study differentiation of isolates of Rhizoctonia solani and Rhizoctonia bataticola (Macrophomina phaseolina). M. SAFFARIAN ABBAS ZADE (1), N. Allaghehband Zadeh (2), R. Farrokhi Nejad (1), S. Rezaee (2), B. Mahmoudi (3). (1) Department of Plant Protection, College of Agriculture, Shahid Chamran University, Ahvaz, Khoozestan, Iran; (2) Department of Plant Pathology, College of Agriculture and Natural Resources, Science and Research Branch, Islamic Azad University, Tehran, Iran; (3) Sugar Beet Seed Institute, Karaj, Tehran, Iran
2:45 p.m. O-205. Evaluation of gibberellin production by the basidiomycete Moniliophthora perniciosa, the causal agent of witches’-broom disease in cacao. O. GARCÍA (1), A. B. Ambrósio (1), R. A. Tiburcio (1), H. M. Milagre (2), L. W. Meinhardt (3), G. A. Pereira (1). (1) Institute of Biology - UNICAMP, Campinas, SP, Brazil; (2) Thomson Mass Spectrometry Laboratory-IQ/UNICAMP, Campinas, SP, Brazil; (3) Sustainable Perennial Crops Laboratory / USDA-ARS, Beltsville, MD, U.S.A.
3:00 p.m. O-206. High-resolution mapping of the wheat Lr46 pleiotropic rust resistance locus. T. CORAM (1), Q. Song (2), J. Fellers (3), M. Mateos-Hernandez (4), L. Perugini (5), R. Singh (6), P. Cregan (2), G. Brown-Guedira (7). (1) USDA ARS, Raleigh, NC, U.S.A.; (2) USDA-ARS, Beltsville, MD, U.S.A.; (3) USDA-ARS, Manhattan, KS, U.S.A.; (4) Pioneer Hi-Bred International, Mexico; (5) Pioneer Hi-Bred International, Champaign, IL, U.S.A.; (6) CIMMYT Wheat Program, Mexico; (7) USDA-ARS, Raleigh, NC, U.S.A.
3:15 p.m. O-207. Identification and activity of silicon transporters from horsetail (Equisetum arvense). C. GREGOIRE (1), W. Rémus-Borel (1), F. Lefebvre (1), R. R. Bélanger (1). (1) Université Laval, Quebec, Canada
Molecular Biology of Bacteria and Nematodes
Wednesday, August 5, 8:30 – 11:30 a.m.; C120-122
Moderators: Amy Roplogle, University of Missouri, Columbia, MO, U.S.A.; Timothy McNellis, Penn State University, University Park, PA, U.S.A.
8:30 a.m. O-217. Selection of molecular aptamers for identification of live cells of Ralstonia solanacearum: A new method in plant pathology. P. G. CHAMPOISEAU (1), J. B. Jones (1), K. Sefah (2), W. Tan (2). (1) University of Florida, Department of Plant Pathology, Gainesville, FL, U.S.A.; (2) University of Florida, Department of Chemistry, Gainesville, FL, U.S.A.
8:45 a.m. O-218. An OmpA family outer membrane protein is required for both disease symptom development and sugarcane stalk colonization by Xanthomonas albilineans. P. C. Rott (1), L. FLEITES (2), G. Marlow (2), M. Royer (1), D. W. Gabriel (2). (1) CIRAD, UMR BGPI, Montpellier, France; (2) University of Florida, Plant Pathology Department, Gainesville, FL, U.S.A.
9:00 a.m. O-219. Two separate phage genomes appear associated with citrus greening (huanglongbing). D. W. GABRIEL (1), S. Zhang (1). (1) University of Florida, Gainesville, FL, U.S.A.
9:15 a.m. O-220. An intact cuticle in distal tissues is essential for the induction of systemic acquired resistance in plants. Q. Gao (1), Y. Xia (1), K. Yu (1), L. Lapchyk (1), D. Navarre (2), D. Hildebrand (1), P. Kachroo (1), A. KACHROO (1). (1) University of Kentucky, Lexington, KY, U.S.A.; (2) USDA-ARS, Prosser, WA, U.S.A.
9:30 a.m. O-221. The galU gene is required for survival of Xanthomonas axonopodis pv. citri in planta and its pathogenicity. Y. GUO (1), U. S. Sagaram (2), N. Wang (2). (1) University of Florida, Lake Alfred, FL, U.S.A.; (2) Citrus Research and Education Center University of Florida, Lake Alfred, FL, U.S.A.
9:45 a.m. O-222. Genetic diversity of citrus huanglongbing bacterium ‘Candidatus Liberibacter asiaticus’. L. ZHOU (1). (1) Horticulture Researsh Laboratory, USDA-ARS, Fort Pierce, FL, U.S.A.
10:00 a.m. BREAK
10:15 a.m. O-223. Analysis of apple (Malus) responses to bacterial pathogens using an oligo microarray. A. BOCSANCZY (1), J. L. Norelli (2), J. G. Phillips (3), C. D. Dardick (4), S. S. Korban (5), C. L. Bassett (2), M. E. Wisniewski (2). (1) MREC/IFAS University of Florida, Apopka, FL, U.S.A.; (2) USDA-ARS Appalachian Fruit Research Station, Kearneysville, WV, U.S.A.; (3) USDA-ARS North Atlantic Area, Wyndmoor, PA, U.S.A.; (4) USDA-ARS Appalachian Fruit Research Station, FL, U.S.A.; (5) Department of Natural Resources & Environmental Sciences, University of Illinois, Champaign, IL, U.S.A.
10:30 a.m. O-224. Structure-function analysis of the flagellin receptor Arabidopsis FLS2: Glycosylation, cysteine pairs and FLS2-FLS2 association. W. SUN (1), K. Jansen (2), P. Bittel (3), T. Boller (3), A. Bent (2). (1) China Agricultural University, Beijing, PRC Peoples Republic of China; Department of Plant Pathology, University of Wisconsin-Madison, Madison, WI, U.S.A.; (2) Department of Plant Pathology, University of Wisconsin-Madison, Madison, WI, U.S.A.; (3) Botanisches Institut der Universität Basel, Switzerland
10:45 a.m. O-225. Apple trees deficient in Fibrillin 6 are sensitive to biotic and abiotic stresses and exhibit decreased plastoglobule osmiophilicity. D. K. Singh (1), S. Maximova (1), T. MCNELLIS (1). (1) Penn State University, University Park, PA, U.S.A.
11:00 a.m. O-226. Monitoring host responses to zebra complex disease on potatoes. V. ALVARADO (1), H. B. Scholthof (1). (1) Texas A&M University, College Station, TX, U.S.A.
11:15 a.m. O-227. Perception of CLE peptides in Arabidopsis during cyst nematode pathogenesis. A. REPLOGLE (1), J. Wang (1), M. G. Mitchum (1). (1) Division of Plant Sciences and Bond Life Sciences Center, University of Missouri, Columbia, MO, U.S.A.
Plant Disease Management
Biological Control
Sunday, August 2, 1:00 – 3:30 p.m.; C124
Moderators: Kenneth Damann, Louisiana State University, Baton Rouge, LA, U.S.A.; Joe Nunez, University of California Coop Ext, Bakersfield, CA, U.S.A.
1:00 p.m. O-1. Field assessment of non-toxigenic Aspergillus flavus strain K49 in competitive displacement of toxigenic isolates. H. K. ABBAS (1), R. M. Zablotowicz (2), H. A. Bruns (3), C. A. Abel (4), M. A. Weaver (2). (1) USDA ARS CG&PRU, Stoneville, MS, U.S.A.; (2) Southern Weed Science Research Unit, USDA-ARS, Stoneville, MS, U.S.A.; (3) Crop Genetic and Production Research Unit, USDA-ARS, Stoneville, MS, U.S.A.; (4) Southern Insect Management Research Unit, USDA-ARS, Stoneville, MS, U.S.A.
1:15 p.m. O-2. Biological control of aflatoxin contamination using non-toxigenic Aspergillus flavus. K. E. DAMANN (1), C. Huang (1), A. Jha (1), R. Sweany (1), C. DeRobertis (1). (1) Louisiana State University, Baton Rouge, LA, U.S.A.
1:30 p.m. O-3. Biological control of take-all disease of wheat by Pseudomonas fluorensce. M. YANG (1), Y. Fu (2), X. Feng (2), J. Guo (2). (1) Nanjing Agriculture University, Nanjing, PRC Peoples Rep of China; (2) Department of Plant Pathology, College of Plant Protection, Nanjing Agricultural University, Key Laboratory of Monitoring and Management of Crop Diseases and Pest Insects, Ministry of Agriculture, Nanjing, China
1:45 p.m. O-4. Efficacy of natural plant products on the control of aggregate sheath spot of rice. P. CHAIJUCKAM (1), R. M. Davis (1). (1) University of California-Davis, CA, U.S.A.
2:00 p.m. O-5. Biocontrol of Sclerotinia stem rot of canola using Pseudomonas fluorescens and Bacillus subtilis, S. Mansouripour (1), A. ALIZADEH (1), N. Safaie (1). (1) Tarbiat Modares University, Tehran, Iran
2:15 p.m. O-6. Management of diseases in vegetable crops by using Trichoderma and Pseudomonas. N. KAUSHIK (1). (1) TERI, New Delhi, India
2:30 p.m. BREAK
2:45 p.m. O-7. Biological control of Ralstonia wilt in tomato. T. Yang (1), Q. XUE (2), W. Zhang (1), H. Liu (1), J. Guo (1). (1) Department of Plant Pathology, College of Plant Protection, Nanjing Agricultural University, Key Laboratory of Monitoring and Management of Crop Diseases and Pest Insects, Ministry of Agriculture, Nanjing, China; (2) Nanjing Agricultural University, Nanjing, PRC Peoples Republic of China
3:00 p.m. O-8. Extracts of Ascophyllum nodosum induce systemic disease resistance in Arabidopsis thaliana and enhance disease resistance in several vegetable crops. S. Subramanian (1), G. Brust (2), J. Jayaraman (3), R. E. ROSS (4), B. Prithiviraj (1). (1) Nova Scotia Agricultural College, Truro, NS, Canada; (2) University of Maryland, Upper Marlboro, MD, U.S.A.; (3) Simon Fraser University, Burnaby, BC, Canada; (4) Acadian Sea Plants LLC, Dartmouth, NS, Canada
3:15 p.m. O-9. Evaluation of alternative nematicides for the control of root-knot nematodes in a commercial carrot field. J. NUNEZ (1). (1) University of California Coop Ext, Bakersfield, CA, U.S.A.
Biological Control
Wednesday, August 5, 8:30 – 11:00 a.m.; A106
Moderators: Brantlee Spakes Richter, North Carolina State University, Raleigh, NC, U.S.A.; Malvika Chaudhary, Bio-Control Research Laboratories, Bangalore, India
8:30 a.m. O-208. Screening antagonistic microbes and study on its controlling effect to Phytophthora blight of pepper. Y. LIU (1), Z. Chen (1), M. Li (1), F. Lu (1), Y. Liu (1), C. Luo (1), Y. Nie (1). (1) Institute of Plant Protection, Jiangsu Academy of Agricultural Science, Nanjing, PRC Peoples Republic of China
8:45 a.m. O-209. Suppression of Phytophthora capsici and Pythium ultimum by the fungal-feeding nematode Aphelenchus avenae. M. GARRISON (1), R. Qi (1), S. Hu (1), D. Shew (1). (1) North Carolina State University, Raleigh, NC, U.S.A.
9:00 a.m. O-210. Cellulase enzymes as a biocontrol mechanism for Phytophthora cinnamomi in mulching systems. B. SPAKES RICHTER (1), D. M. Benson (1), K. Ivors (2). (1) North Carolina State University, Raleigh, NC, U.S.A.; (2) North Carolina State University, Fletcher, NC, U.S.A.
9:15 a.m. O-211. Efficacy of new formulations of Milsana®, conventional and organic Regalia™, in controlling cucumber powdery mildew (Sphaerotheca fuliginea). H. SU (1), C. Morgan (1), B. Campbell (1), H. Huang (1), J. Hernandez (1), M. E. Koivunen (1), P. G. Marrone (1). (1) Marrone Bio Innovations, Inc., U.S.A.
9:30 a.m. O-212. Antifungal activity of a new broad spectrum bio-fungicide in the controlling of plant diseases. Y. VARDI (1), M. Reuveni (2). (1) Biomor Israel Ltd., Katzrin, Israel; (2) University of Haifa, Israel
9:45 a.m. O-213. BioIntensive management of collar rot affecting tropical sugar beet with biopesticides NIPROT (Trichoderma viride) and Su-Mona (Pseudomonas fluorescens). M. CHAUDHARY (1). (1) Bio-Control Research Laboratories, Bangalore, India
10:00 a.m. BREAK
10:15 a.m. O-214. A new potent bio-fungicide for the control of banana black sigatoka. E. E. MARTILLO (1), M. Reuveni (2). (1) Agripac S.A., Guayaquil, Guayas, Ecuador, emartill@agripac.com.ec; (2) University of Haifa, Katzrin, Israel
10:30 a.m. O-215. Contans®, a fungal mycoparasite for control of Sclerotinia spp. in the soil from SipcamAdvan and Prophyta Biologischer Pflanzenschutz GmbH. K. SCHWARTAU (1), P. Leuth (2), S. Peterson (3), G. Stallings (3). (1) SipcamAdvan, Davis, CA, U.S.A.; (2) Prophyta Biologischer Pflanzenschutz GmbH, Malchow, Germany; (3) SipcamAdvan, Boise, ID, U.S.A.
10:45 a.m. O-216. A new tea tree oil-based organic fungicide for the control of grape powdery and downy mildews. M. REUVENI (1), C. J. Arroyo (2), J. L. Henriquez (3). (1) Golan Research Inst,, University of Haifa, Kazrin, Israel; (2) MAGAN, Las Condes, Chile; (3) University of Chile, Santiago, Chile
Chemical Control
Tuesday, August 4, 8:30 – 11:30 a.m.; C123
Moderators: Gerald Miller, North Carolina State University, Raleigh, NC, U.S.A.; Lorianne Fought, Bayer CropScience, Fresno, CA, U.S.A.
8:30 a.m. O-135. Propiconazole and fludioxonil for managing postharvest fungal decays of fresh market tomato. A. COCHRAN (1), J. Adaskaveg (2), H. Förster (2). (1) Syngenta Crop Protection, Granite Bay, CA, U.S.A.; (2) University of California, Riverside, CA, U.S.A.
8:45 a.m. O-136. Difenoconazole – A new fungicide for controlling postharvest decays of pome fruit and a mix partner for fungicide resistance management. H. FÖRSTER (1), A. Cochran (2), R. Spotts (3), J. E. Adaskaveg (4). (1) University of California, Davis, CA, U.S.A.; (2) Syngenta Crop Protection, Roseville, CA, U.S.A.; (3) Oregon State University, Hood River, OR, U.S.A.; (4) University of California, Riverside, CA, U.S.A.
9:00 a.m. O-137. Fluopyram – A new active ingredient from Bayer CropScience. L. FOUGHT (1), G. H. Musson (2), J. R. Bloomberg (2), H. Young (2). (1) Bayer CropScience, Fresno, CA, U.S.A.; (2) Bayer CropScience, Research Triangle Park, NC, U.S.A.
9:15 a.m. O-138. Fluopyram for the control of diseases of horticultural crops. G. H. MUSSON (1), L. Fought (2), J. R. Bloomberg (1), H. Young (1). (1) Bayer CropScience, Res Triangle Park, NC, U.S.A.; (2) Bayer CropScience, Fresno, CA, U.S.A.
9:30 a.m. O-139. IR-4 Project – Fungicide registration update. D. C. THOMPSON (1), D. L. Kunkel (2), D. Carpenter (2), W. Barney (2), J. Corley (2). (1) Rutgers University, Princeton, NJ, U.S.A.; (2) IR-4 Project, Rutgers University
9:45 a.m. O-140. The impact of strobilurin fungicides on disease development and yield in corn and cotton. G. PADGETT (1), T. W. Allen (2), C. M. Coker (3), A. Greer (3), M. A. Purvis (1). (1) Louisiana State University, Winnsboro, LA, U.S.A.; (2) Mississippi State University, Stoneville, MS, U.S.A.; (3) University of Arkansas, Monticello, AR, U.S.A.
10:00 a.m. BREAK
10:15 a.m. O-141. Impact of application method on the efficacy of preventive DMI fungicide applications for fairy ring control on golf putting greens. G. L. MILLER (1), L. P. Tredway (1). (1) North Carolina State University, Raleigh, NC, U.S.A.
10:30 a.m. O-142. Fungicide concentration analysis on creeping bentgrass leaf blades using commercially available ELISA kits for the control of Microdochium nivale. P. L. KOCH (1), J. P. Kerns (2), J. C. Stier (2). (1) University of Wisconsin, Verona, WI, U.S.A.; (2) University of Wisconsin, Madison, WI, U.S.A.
10:45 a.m. O-143. Effects of copper-based fungicides on leaf bronzing, foliar gas exchange, and fruit quality of tart cherry. B. R. GRUBER (1), L. R. Davies (1), E. L. Kruger (1), P. S. McManus (1). (1) University of Wisconsin-Madison, Madison, WI, U.S.A.
11:00 a.m. O-144. Performance assessments of methyl bromide alternative fumigants in sting nematode infested strawberry fields in Florida. J. W. NOLING (1). (1) University of Florida, Lake Alfred, FL, U.S.A.
11:15 a.m. O-145. Chemical control of Phytophthora blight (Phytophthora capsici) of pumpkin in Illinois. M. BABADOOST (1). (1) University of Illinois, Urbana, IL, U.S.A.
Chemical Control
Tuesday, August 4, 1:00 – 3:30 p.m.; A106
Moderators: James Adaskaveg, University of California, Riverside, CA, U.S.A.; Megan Dewdney, University of Florida, CREC, Lake Alfred, FL, U.S.A.
1:00 p.m. O-168. QoI resistance in Fusicladosporium carpophilum populations from almond in California. H. Förster (1), J. H. Connell (2), J. E. ADASKAVEG (3). (1) University of California, Davis, CA, U.S.A.; (2) University of California Cooperative Extension, Butte Co., CA, U.S.A.; (3) University of California, Riverside, CA, U.S.A.
1:15 p.m. O-169. Resistance to strobilurin fungicides in a population of Alternaria alternata causing Alternaria brown spot of citrus. S. N. Mondal (1), A. Godoy da Silva (1), M. M. DEWDNEY (1). (1) University of Florida, CREC, Lake Alfred, FL, U.S.A.
1:30 p.m. O-170. Comparison of molecular and mycelium assay for determining benzimidazole resistance in field populations of Venturia inaequalis in Indiana. K. QUELLO (1), K. Chapman (1), J. Beckerman (1). (1) Purdue University, West Lafayette, IN, U.S.A.
1:45 p.m. O-171. Resistance to pyraclostrobin and boscalid in Botrytis cinerea populations from apple in Washington State. Y. K. KIM (1), C. L. Xiao (1). (1) Washington State University, TFREC, Wenatchee, WA, U.S.A.
2:00 p.m. O-172. Mutations in the target of DMI fungicides (CYP51) in Mycosphaerella graminicola and their impact on DMI sensitivity. M. FRANK (1), D. Strobel (1), M. Semar (1), G. Stammler (1). (1) BASF S.E., Limburgerhof, Germany
2:15 p.m. O-173. Fungicide sensitivity and resistance of the cucurbit powdery mildew pathogen in New York, Pennsylvania, Ohio, and Indiana in 2008. M. T. MCGRATH (1), D. S. Egel (2), J. Jasinski (3), S. A. Miller (4), L. H. Rhodes (5), R. Precheur (6). (1) Department of Plant Pathology & Plant-Microbe Biology, Cornell University, Riverhead, NY, U.S.A.; (2) Southwest Purdue Agricultural Center, Vincennes, IN, U.S.A.; (3) Ohio State University Extension, Urbana, OH, U.S.A.; (4) Department of Plant Pathology, Ohio State University – OARDC, Wooster, OH, U.S.A.; (5) Department of Plant Pathology, Ohio State University, Columbus, OH, U.S.A.; (6) Department of Horticulture & Crop Science, Ohio State University, Columbus, OH, U.S.A.
2:30 p.m. O-174. Resistance to respiration inhibitor fungicides in Monilinia fructicola field isolates from South Carolina and Georgia. A. AMIRI (1), P. M. Brannen (2), G. Schnabel (1). (1) Clemson University, Clemson, SC, U.S.A.; (2) University of Georgia, Athens, GA, U.S.A.
2:45 p.m. O-175. A survey of Venturia inaequalis fungicide resistance in Indiana and Michigan apple orchards. K. CHAPMAN (1), K. Quello (1), J. Beckerman (1). (1) Purdue University, West Lafayette, IN, U.S.A.
3:00 p.m. O-176. Systemic movement of fungicides in peanut plants in the field. J. AUGUSTO (1), T. Brenneman (1). (1) University of Georgia, Tifton, GA, U.S.A.
3:15 p.m. O-177. Organic apple disease management in Vermont with alternative fungicides. M. L. CROMWELL (1), L. P. Berkett (1), H. M. Darby (1), T. Ashikaga (1). (1) University of Vermont, Burlington, VT, U.S.A.
Disease Detection
Tuesday, August 4, 1:00 – 3:30 p.m.; C124
Section: Plant Disease Management
Moderators: Mani Skaria, Texas A&M University-Kingsville, Weslaco, TX, U.S.A.; Russell Groves, University of Wisconsin, Madison, WI, U.S.A.
1:00 p.m. O-178. Data trends and results from an HLB testing laboratory that has processed over 64,000 commercial and research samples over a two-year period in Florida. M. S. Irey (1), P. Mai (1), J. Johnson (1), J. H. GRAHAM (2). (1) United States Sugar Corporation/Southern Gardens Citrus, Clewiston, FL, U.S.A.; (2) University of Florida, Lake Alfred, FL, U.S.A.
1:15 p.m. O-179. Micro-budded citrus: A new production system for huanglongbing management. M. SKARIA (1), R. Hanagriff (2). (1) Texas A&M University-Kingsville, Weslaco, TX, U.S.A.; (2) Texas A&M University-Kingsville Citrus Center, Weslaco, TX, U.S.A.
1:30 p.m. O-180. Identification of Xanthomonas leaf blight from umbelliferous seed crops grown in Oregon. X. MENG (1), R. Ludy (1), C. Fraley (1), N. Osterbauer (1). (1) Oregon Department of Agriculture, Salem, OR, U.S.A.
1:45 p.m. O-181. Detection of mycotoxigenic fungi and indirect competitive ELISA for fumonisin B1 in sorghum. B. REDDY (1). (1) Osmania University, Hyderabad, Andhra Pradesh, India
2:00 p.m. O-182. Early detection and eradication of Phytophthora ramorum (sudden oak death) in Oregon forests. A. KANASKIE (1), E. Goheen (2), E. Hansen (3), N. Osterbauer (4), M. McWilliams (5), R. Schultz (6), S. Savona (7), W. Sutton (3), P. Reeser (3). (1) Oregon Department of Forestry, Salem, OR, U.S.A.; (2) USDA-Forest Service, Medford, OR, U.S.A.; (3) Oregon State University, Corvallis, OR, U.S.A.; (4) Oregon Department of Agriculture, Salem, OR, U.S.A.; (5) Oregon Department of Forestry, Salem, OR, U.S.A.; (6) USDI-Bureau of Land Management, Coos Bay, OR, U.S.A.; (7) Oregon Department of Forestry, Brookings, OR, U.S.A.
2:15 p.m. O-183. Monitoring the effectiveness of Phytophthora ramorum eradication treatments in southwest Oregon tanoak forests. A. Kanaskie (1), E. M. GOHEEN (2), E. M. Hansen (3), W. Sutton (3), P. Reeser (3), N. Osterbauer (4). (1) Oregon Department of Forestry, Salem, OR, U.S.A.; (2) USDA Forest Service, Central Point, OR, U.S.A.; (3) Oregon State University, Corvallis, OR, U.S.A.; (4) Oregon Department of Agriculture, Salem, OR, U.S.A.
2:30 p.m. O-184. Integrated pest and disease management: Reducing current season spread of Potato virus Y in potato. R. GROVES (1), A. Charkowski (1), A. Crockford (1), R. Coltman (1), R. Hafner (1), K. Bula (1). (1) University of Wisconsin, Madison, WI, U.S.A.
2:45 p.m. O-185. TurfFiles decision aids for diagnosis and management of turfgrass diseases. L. P. TREDWAY (1), G. G. Wilkerson (1), M. C. Sturgill (1), B. R. Lassiter (1), V. J. Chungath (1), G. S. Buol (1). (1) North Carolina State University, Raleigh, NC, U.S.A.
3:00 p.m. O-186. Comparison of products and application methods for control of Sclerotinia drop of lettuce. M. E. MATHERON (1), M. Porchas (1). (1) Yuma Agricultural Center, University of Arizona, Yuma, AZ, U.S.A.
3:15 p.m. O-187. Effect of fungi-toxicants on spore germination of Puccinia graminis f. sp. tritici. V. GUPTA (1), J. M. Stein (1). (1) South Dakota State University, Brookings, SD, U.S.A.
Host Resistance
Sunday, August 2, 1:00 – 4:00 p.m.; A106
Moderators: Gilda Rauscher, USDA ARS, Salinas, CA, U.S.A.; Christopher Ridout, The British Society for Plant Pathology, Reading, United Kingdom
1:00 p.m. O-10. Quantitative trait loci associated with seedling and adult-plant resistance to oat crown rust caused by Puccinia coronata. M. ACEVEDO (1), E. W. Jackson (1), J. Chong (2), H. W. Rines (3), A. Bateman (1), J. Bonman (1). (1) USDA-ARS Small Grains and Potato Germplasm Research Unit, Aberdeen, ID, U.S.A.; (2) Cereal Research Centre, Agriculture and Agri-Food Canada, Winnipeg, MB, Canada; (3) USDA-ARS, Department of Agronomy and Plant Genetics, University of Minnesota, St. Paul, MN, U.S.A.
1:15 p.m. O-11. QTL mapping of resistance to powdery mildew in lettuce. G. RAUSCHER (1), R. Hayes (1), I. Simko (1). (1) USDA-ARS, Salinas, CA, U.S.A.
1:30 p.m. O-12. Development of multiplex SNP assays for multiple disease resistance in tomato. A. SHI (1), R. Vierling (2), R. Grazzini (3). (1) Indiana Crop Improvement Association, Lafayette, IN, U.S.A.; (2) Indiana Crop Improvement Association and Department of Agronomy, Purdue University, West Lafayette, IN, U.S.A.; (3) GardenGenetics LLC, Bellefonte, PA, U.S.A.
1:45 p.m. O-13. Resources for fast-forward R gene mapping and isolation in the genus Solanum. J. M. Bradeen (1), H. MANN (1), E. A. Quirin (1). (1) University of Minnesota, St. Paul, MN, U.S.A.
2:00 p.m. O-14. Genome wide association mapping of resistance to common root in barley breeding germplasm from the Upper Midwest of U.S.A. S. GYAWALI (1), R. Horsley (1), K. P. Smith (2), B. Cooper (3), S. Chao (4), S. Neate (1). (1) North Dakota State University, Fargo, ND, U.S.A.; (2) University of Minnesota, St. Paul, MN, U.S.A.; (3) Busch Agricultural Resources Inc. (BARI); (4) USDA-ARS Biosciences Research Lab
2:15 p.m. O-15. Evaluation of pattern recognition receptors for durable disease control in crops. C. RIDOUT (1), E. Sherwood (2), A. Rougon (2), S. Lacombe (2), C. Zipfel (2). (1) John Innes Centre, Norwich, United Kingdom; (2) The Sainsbury Laboratory, Norwich Research Park, Norwich, United Kingdom
2:30 p.m. BREAK
2:45 p.m. O-16. Identifying resistance genes for eyespot of wheat in Aegilops longissima. H. SHENG (1), T. D. Murray (1). (1) Department of Plant Pathology, Washington State University, Pullman, WA, U.S.A.
3:00 p.m. O-17. Combining rust resistance genes in snap beans for eastern Africa. M. A. PASTOR-CORRALES (1), C. Wasonga (2), P. Griffiths (2). (1) USDA ARS, Beltsville, MD, U.S.A.; (2) Cornell University, Geneva, NY, U.S.A.
3:15 p.m. O-18. Cisgenic approach to disease resistance in apple. C. GESSLER (1), T. Vanblaere (1), I. Szankowski (1), G. Broggini (1). (1) ETH-Zürich, Zurich, Switzerland
3:30 p.m. O-19. Resistance to Cronartium ribicola in whitebark pine – Family variation and effect of inoculum density. R. A. SNIEZKO (1), A. Kegley (1), R. Danchok (1), J. Hamlin (2), S. Long (1). (1) USDA FS/Dorena Genetic Resource Center, Cottage Grove, OR, U.S.A.; (2) USDA FS/Umpqua NF, Roseburg, OR, U.S.A.
3:45 p.m. O-20. Characterization and mapping of a gene component for durable leaf rust resistance in chromosome arm 7BL. S. A. HERRERA-FOESSEL (1), R. P. Singh (1), J. Huerta-Espino (2), E. S. Lagudah (3). (1) CIMMYT, Mexico D.F., Mexico; (2) INIFAP, Mexico D.F., Mexico; (3) CSIRO Industry, Clayton South, Australia
Host Resistance
Monday, August 2, 8:30 – 11:15 a.m.; A106
Moderators: Stephen Jordan, University of Florida, Department of Plant Pathology, Gainesville, FL, U.S.A.; Richard Smiley, Oregon State University, Pendleton, OR, U.S.A.
8:30 a.m. O-65. A method to assess infection of soybean roots by soybean cyst nematode with quantitative polymerase chain reaction. H. D. LOPEZ NICORA (1), J. P. Craig (1), T. L. Niblack (1). (1) University of Illinois, Urbana, IL, U.S.A.
8:45 a.m. O-66. Screening wheat landraces for resistance to new races of Puccinia graminis f. sp. tritici. J. BONMAN (1), M. Acevedo (1), E. W. Jackson (1), A. M. Bateman (1), Y. Jin (2), P. Njau (3), R. Wanyera (3), H. Bockelman (1), B. Goates (1). (1) USDA ARS, Aberdeen, ID, U.S.A.; (2) CDL, USDA-ARS, St. Paul, MN, U.S.A.; (3) KARI, Njoro, Kenya
9:00 a.m. O-67. Characterization of kudzu (Pueraria spp.) resistance to Phakopsora pachyrhizi, the causal agent of soybean rust. S. A. JORDAN (1), P. F. Harmon (1), J. J. Marois (2), D. L. Wright (3), C. L. Harmon (4), A. J. Gevens (1). (1) University of Florida, Department of Plant Pathology, Gainesville, FL, U.S.A.; (2) University of Florida, Department of Plant Pathology, North Florida Research and Education Center, Quincy, FL, U.S.A.; (3) University of Florida, Department of Agronomy, North Florida Research and Education Center, Quincy, FL, U.S.A.; (4) Southern Plant Diagnostic Network, University of Florida, Gainesville, FL, U.S.A.
9:15 a.m. O-68. Root-lesion nematode tolerance reactions among wheat and barley genotypes. R. W. SMILEY (1), H. Yan (1). (1) Oregon State University, Pendleton, OR, U.S.A.
9:30 a.m. O-69. Resistance in tomato and wild relatives to Phytophthora capsici. L. M. QUESADA-OCAMPO (1), M. K. Hausbeck (1). (1) Michigan State University, East Lansing, MI, U.S.A.
9:45 a.m. O-70. Large-scale field screening of transgenic anthuriums for bacterial blight resistance. L. KEITH (1), L. Sugiyama (1), T. Matsumoto (1), M. Fitch (2), T. Leong (2), H. Aldwinckle (3), H. McCafferty (2), J. Zhu (2), D. Gonsalves (1). (1) USDA-ARS, Hilo, HI, U.S.A.; (2) HARC, Aiea, HI, U.S.A.; (3) Cornell University, Geneva, NY, U.S.A.
10:00 a.m. BREAK
10:15 a.m. O-71. Crop management strategies and disease resistance control the severity of false smut and kernel smut of rice. S. BROOKS (1), M. Anders (2), K. Yeater (3). (1) USDA ARS Dale Bumpers National Rice Research Center, Stuttgart, AR, U.S.A.; (2) University of Arkansas, Rice Research and Extension Center, Stuttgart, AR, U.S.A.; (3) USDA ARS, College Station, TX, U.S.A.
10:30 a.m. O-72. Evaluation of Mentha longifolia for resistance to Verticillium dahliae isolates from various hosts. J. K. DUNG (1), D. A. Johnson (1). (1) Washington State University, Pullman, WA, U.S.A.
10:45 a.m. O-73. Resistance of onion varieties to foliar blight disease. E. SHAHNAZ (1), V. K. Razdan (2). (1) Sher-e-Kashmir University of Agricultural Sciences & Technology, Srinagar, India; (2) Sher-e-Kashmir University of Agricultural Sciences & Technology, Jammu, India
11:00 a.m. O-74. Cultivar-specific interactions between switchgrass and Puccinia emaculata. Y. LI (1), M. Windham (1), R. Trigiano (1), A. Windham (2), B. Ownley (1), K. Gwinn (1), J. Zale (1), J. Spiers (3). (1) University of Tennessee, Knoxville, TN, U.S.A.; (2) University of Tennessee, Nashville, TN, U.S.A.; (3) USDA/ARS, Poplarville, MS, U.S.A.
IPM
Monday, August 3, 1:00 – 3:15 p.m.; A107-109
Moderators: Craig Austin, Cornell University NYSAES, Geneva, NY, U.S.A.; Shanna Mazurek, North Dakota State University, Fargo, ND, U.S.A.
1:00 p.m. O-105. Influence of climatic conditions on the efficacy of early season fungicide applications to manage dollar spot. J. KOENIG (1), T. E. Hicks (1), J. W. Rimelspach (1), L. V. Madden (2), M. Boehm (1). (1) Ohio State University, Columbus, OH, U.S.A.; (2) Ohio State University, OARDC, Wooster, OH, U.S.A.
1:15 p.m. O-106. Effects of foot traffic and sand topdressing on anthracnose severity of annual bluegrass putting green turf. J. A. ROBERTS (1), J. C. Inguagiato (2), B. B. Clarke (1), J. A. Murphy (1). (1) Rutgers University, New Brunswick, NJ, U.S.A.; (2) University of Connecticut, Storrs, CT, U.S.A.
1:30 p.m. O-107. Effects of soil pH on Rhizoctonia damping-off of sugar beet and disease suppressiveness caused by antagonistic soil microorganisms. K. Watanabe (1), J. O. Becker (2), M. Kasuya (1), H. Honjo (1), R. FUKUI (1). (1) Utsunomiya University, Utsunomiya, Tochigi, Japan; (2) University of California at Riverside, Riverside, CA, U.S.A.
1:45 p.m. O-108. Inhibition of grapevine powdery mildew by improved vineyard sunlight exposure. C. N. AUSTIN (1), A. N. Lakso (2), R. C. Seem (1), D. G. Riegel (1), G. G. Grove (3), W. F. Wilcox (1). (1) Department of Plant Pathology, Cornell University NYSAES, Geneva, NY, U.S.A.; (2) Department of Horticultural Science, Cornell University NYSAES, Geneva, NY, U.S.A.; (3) Washington State University-Irrigated Agriculture Research and Extension Center, Prosser, WA, U.S.A.
2:00 p.m. O-109. Integrated management of strawberry gray mold. L. V. Cota (1), L. A. MAFFIA (2), E. S. Mizubuti (2), P. E. Macedo (2). (1) Embrapa Milho e Sorgo/EMBRAPA/Sete Lagoas, MG, Brazil; (2) Department Fitopatologia/UFV, Viçosa, MG, Brazil
2:15 p.m. O-110. Cyberinfrastructure challenges to multi-regional, multi-scale weather forecasting for crop disease early warning systems. K. BAKER (1), J. Stein (2), P. Wharton (3), J. Paz (4), W. W. Kirk (5), B. Plale (6). (1) Department of Geography, Western Michigan University, Kalamazoo, MI, U.S.A.; (2) South Dakota State University, Brookings, SD, U.S.A.; (3) Aberdeen Research & Extension Center, University of Idaho, Aberdeen, ID, U.S.A.; (4) Department of Biological and Agricultural Engineering, The University of Georgia, Griffin, GA, U.S.A.; (5) Department of Plant Pathology, Michigan State University, East Lansing, MI, U.S.A.; (6) Department of Computer Science, Indiana University, Bloomington, IN, U.S.A.
2:30 p.m. O-111. Yield effect and control of yellow leaf disease under tropical conditions of Ecuador. F. F. GARCES (1), J. R. Mendoza (1), F. Fiallos (1), C. Valladares (1), C. Burbano (1). (1) Centro de Investigación de la Caña de azúcar del Ecuador (CINCAE), Av. Constitución y Joaquín Orrantia Ed, Executive Center, Mezzanine, Empresa FIADE, Guayaquil-Ecuador
2:45 p.m. O-112. Impact of rotation and fungicide application on blackleg and Sclerotinia stem rot of canola. B. M. Jenks (1), S. A. MAZUREK (2), G. P. Willoughby (1), S. G. Markell (2), L. E. del Rio (2). (1) North Dakota State University, Minot, ND, U.S.A.; (2) North Dakota State University, Fargo, ND, U.S.A.
3:00 p.m. O-113. Radish cover crops as a means for Rotylenchulus reniformis management in cotton. N. SEKORA (1), K. S. Lawrence (1), E. vas Santen (1). (1) Auburn University, Auburn, AL, U.S.A.
