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United States Department of Agriculture

Agricultural Research Service

Selected Publications in Adobe PDF format
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Henning, J. A., M. S. Townsend, D. H. N. P. Matthews, E. Buck, R. Beatson 2011.  QTL mapping of powdery mildew susceptibility in hop (Humulus lupulus). Plant Health Progress 20. August 2010.

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M. N. Mitchell, C. M. Ocamb, N. J. Grünwald, L. E. Mancino, and D. H. Gent. 2011 Genetic and Pathogenic Relatedness of Pseudoperonospora cubensis and P. humuli.  Phytopathology Vol. 101, No. 7, 2011 805-818.

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Pethybridge, S. J., F. S. Hay, and D. H. Gent. 2011. Characterization of the Spatioltemporal Attributes of Sclerotinia Flower Blight Epidemics in a Perennial Pyrethrum Pathosystem. Plant Disease / November 2010 1305- 1313.

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Gent, D. H., J. L. Farnsworth and D. A. Johnson. 2011. Spatial analysis and incidence density relationships for downy mildew on hop. Plant Pathology (2011) Doi: 10.1111/j.1365-3059.2011.02491.x.

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Jones, S. J., D. H. Gent, S. J. Pethybridge and F. S. Hay. 2011. Spatial characteristics of white mould epidemics and the development of sequential sampling plans in Australian bean fields. Plant Pathology (2011) Doi: 10.1111/j.1365-3059.2011.02466.

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Jones S.J., S. J. Pethybridge, D. H. Gent and F. S. Hay. 2011. Sensitivity of Australian Sclerotinia sclerotiorum isolates from bean fields to boscalid. New Zealand Journal of Crop and Horticultural Science. iFirst, 2011, 1-5

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Schwartz, H. F, D. H. Gent, S. M. Fichtner, R. Khosla, L. A. Mahaffey, M. A. Camper and W. S. Cranshaw. 2010. Iris yellowspot virus and Thrips in Colorado Onion Fields. Plant Health Progress 20 August 2010

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Gent, D. H., Ocamb, C. M., and Farnsworth, J. L. 2010. Forecasting and management of hop downy mildew. Plant Dis. 94:425-431.

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Gent, David H. and Ocamb, C. M.  2009. Predicting Infection Risk of Hop by Pseudoperonspora humuli.  Phytopathology 99-10-1190 

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Gent, David H.Nelson M. E., Farnsworth, J. L., Grove, G. G.  2009.  PCR detection of in air samples from hop yards.  Plant Pathology (2009) 1081–1091

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Peetz, A. B., Mahaffee,  W. F., David H. Gent, D. H.  2009.  Effect of Temperature on Sporulation and Infectivity of Podosphaera macularis on Humulus lupulus. Plant Disease / Vol. 93 No.3

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GENT, D. H., JAMES, D. G., WRIGHT, L. C., BROOKS,  D. J.,  BARBOUR, J. D.,  DREVES, A. J., FISHER,G. C.  AND WALTON, V. M.  2009.  Effects of Powdery Mildew Fungicide Programs on Two spotted Spider Mite (Acari: Tetranychidae), Hop Aphid (Hemiptera: Aphididae), and Their Natural Enemies in Hop Yards.  JOURNAL OF ECONOMIC ENTOMOLOGY Vol. 102, no. 1

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Gent, D. H., Nelson, M. E., George, A. E., Grove,  G. C., Mahaffee, W. F., Ocamb, C. M., Barbour, J. D., Amy Peetz, A., Turechek, W. W.  2008.  A Decade of Hop Powdery Mildew in the Pacific Northwest. Plant Health Progress

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Gent, D. H., Turechek, W. W., and Mahaffee, W. F.  2008.  Spatial and Temporal Stability of the Estimated Parameters of the Binary Power Law.  Ecology and Epidemiology  Vol. 98, No. 10, 2008

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Gent, D. H., Nelson, M. E and Grove, G. G., 2008.  Persistence of Phenylamide Insensitivity in Pseudoperonospora humuli.  Plant Disease / Vol. 92 No. 3 

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Pethybridge, S. J., Hay F. S., Esker, P. D., Gent, D. H., Wilson, C. R., Groom, T., Nutter Jr., F. W., 2008. Diseases of Pyrethrum in Tasmania: Challenges and Prospects for Management.  Plant Disease / Vol. 92 No. 9

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Gent, D. H., Turechek, W. W., and Mahaffee, W. F. 2007.  Sequential Sampling for Estimation and Classification of the Incidence of Hop Powdery Mildew I: Leaf Sampling.  Plant Disease / Vol. 91 No. 8

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Gent, D. H., Turechek, W. W., and Mahaffee, W. F. 2007. Sequential Sampling for Estimation and Classification of the Incidence of Hop Powdery Mildew II: Cone Sampling Plant Disease / Vol. 91 No. 8

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Walton, V. M., Dreves, A. J., Gent, D. H., James, D. G., Martin, R. R., Chambers, U.,and Skinkis, P. A.  2007.  RELATIONSHIP BETWEEN RUST MITES CALEPITRIMERUS VITIS (NALEPA), BUD MITES COLOMERUS VITIS (PAGENSTECHER) (ACARI: ERIOPHYIDAE) AND SHORT SHOOT SYNDROME IN OREGON VINEYARDS.  Internat. J. Acarol. Vol. 33, No. 4

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Gent, D. H., Mahaffee, W. F. and Turechek, W. W. 2006. Spatial Heterogeneity of the Incidence of Powdery Mildew on Hop Cones Plant Disease / Vol. 90 No. 11

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Gent, D. H., Mohan, S. K. , du Toit, L. J., Papu, H. R., Fichtner, S. F., and Schwatrz, H. H.  2006.  Iris yellow spot virus:  An Emerging Threat to Onion Bulb and Seed Production. Plant Disease / Vol. 90 No. 12

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Gent, D. H., and Schwartz, H. F, 2005.  Management of Xanthomonas leaf blight of onion with a plant activator, biological control agents, and copper bactericides.     Plant Disease 89:631-639.

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Gent , D. H., and Schwartz, H. F. 2005. Effect of nitrogen fertilization and seed contamination on epiphytic populations of Xanthomonas axonopodis pv. allii and development of Xanthomonas leaf blight of onion. Online. Plant Health Progress doi:10.1094/PHP-2005-0331-01-RS.

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  Gent , D. H., Lang, J. M., and Schwartz, H. F., 2005.  Epiphytic Survival of Xanthomonas axonopodis pv. allii and X. axonopodis pv. phaseoli on Leguminous Hosts and Onion.  Plant Disease 98: 558-564.

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Gent, D. H., and Schwartz, H. F., 2005. Management of Xanthomonas leaf blight of onion with a plant activator, biological control agents, and copper bactericides.   Plant Disease 89:631-639.

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  Gent , D. H., Lang, J. M, Bartolo, M. E., and Schwartz, H. F. 2005.   Inoculum sources and survival of Xanthomonas axonopodis pv. allii in Colorado.   Plant Dis. 89:507-514.

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Gent, D. H., Al-Saadi, A., Gabriel, D. W., Louws, F. J., Ishimaru, C. A., and Schwartz, H. F. 2005.   Pathogenic and genetic relatedness among Xanthomonas axonopodis pv. allii and other pathovars of X. axonopodis.   Phytopathology 95:918-925.

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Gent, D. H., Schwartz, H. F., Ishimaru, C. A., Louws, F. J., Cramer, R. A., and Lawrence, C. B.   2004. Polyphasic characterization Xanthomonas strains from onion.   Phytopathology 94:184-195.

 

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  Gent, D. H., Schwartz, H. F., and Khosla, R. 2004.   Distribution and incidence of Iris yellow spot virus in Colorado and its relation to onion plant population and yield.   Plant Disease 88: 446-452.

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Gent , D. H., Schwartz, H. F., and Nissen, S. J. 2003.   Effect of commercial adjuvants on vegetable crop fungicide coverage, absorption, and efficacy.   Plant Disease 87:591-597.


Last Modified: 7/7/2011
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