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Gary Grove

Plant Pathologist, Extension Plant Pathologist, and Professor

Gary Grove
Irrigated Agriculture Research and Extension Center
Office: Hamilton Hall – 136
Lab: Hamilton Hall – 131/132

Tel.: (509)786-9283
Fax: (509)786-9370

Research Specialty and Interests

Epidemiology and management of fungal diseases of stone fruits, grapes, and hops; disease forecasting and fungicide resistance management.

Professional Experience

  • WSU Professor of Plant Pathology, 2006-present
  • Director, Washington Agricultural Weather Network, 2006-2010
  • WSU Associate Plant Pathologist, 1993-2006
  • WSU Assistant Plant Pathologist, 1986-1992
  • Postdoctoral Plant Pathologist, University of California, Davis, 1984-1986
  • Technical Assistant, Soybean Pathology Laboratory, OSU/OARDEC, Wooster 1979-1981


  • American Phytopathological Society Excellence in Extension Award, 2010
  • WSU-CAHNRS Award of Merit, 2010
  • WSU-CAHNRS Team Multidisciplinary Award, 2008
  • Councilor, Pacific Division, American Phytopathological Society 2003-present
  • American Society for Enology and Viticulture
  • American Phytopathological Society
  • Canadian Phytopathological Society
  • Washington Association of Wine Grape Growers
  • WSU CAHE Team Excellence Award, 1998

Selected Publications

  • Austin, C., Wilcox,W.F., and Grove, G.G. 2011. Powdery Mildew Severity as a Function of Canopy Density: Associated Impacts on Sunlight Penetration and Spray Coverage. American Journal of Enology and Viticulture (IN PRESS).
  • Ferguson, J.C., Tarara, J.M., Mills, L.J., Grove, G.G., and Keller, M. 2011. Dynamic thermal-time model of cold hardiness for dormant grapevine buds. Annals of Botany Ann Bot (2011) 107 (3): 389-396.
  • doi: 10.1093/aob/mcq263
  • Jones, V.P., Brunner, J.F., Grove, G.G., Petit, B., Tangren, G.V., and Jones, W.E. 2010. A web-based decision support system to enhance IPM programs in Washington tree fruit. Pest Management Science 66:587-595.
  • Gent, D.H., Nelson, M.E., Farnsworth, J.L., and Grove, G.G. 2009. PCR detection of Pseudoperonospora humuli in air samples from hop yards. Plant Pathology Doi: 10.1111/j.1365-3059.2009.02143.x.
  • Calabro, J., Spotts, R.A., and Grove, G.G. 2009. The Effect of Training System, Rootstock, and Cultivar on Sweet Cherry Powdery Mildew Foliar Infections. Hort Science 44(2):481-482.
  • Gent, D. H., Nelson, M. E., George, A. E., Grove, G. G., Mahaffee, W. F., Ocamb, C. M., Barbour, J. D., Peetz, A., and Turechek, W. W. 2008. A decade of hop powdery mildew in the pacific northwest. Online. Plant Health Progress doi:10.1094/PHP-2008-0314-01-RV.
  • Gent, D.H., Nelson, M.E., and Grove, G.G. 2008. Persistence of phenylamide insensitivity in Pseudoperonospora humuli. Plant Disease 92(3):463-468.
  • Falacy, J.S., Grove, G.G., Mahaffee, W., Larsen, R.C., Vandermark, G.J., Glawe, D.A., and Galloway, H. 2007. Detection of Erysiphe necator (Uncinula necator) with Polymerase Chain Reaction and Species-Specific Primers. Phytopathology 97(10): 1290-1297.
  • Glawe, D.A., Grove, G.G., and Nelson, M.E. 2006. First Report of Powdery Mildew of Gaillardia X grandiflora (Blanket flower) Caused by Leveillula taurica in North America. Plant Health Progress doi:10.1094/PHP-2006-0112-01-BR.
  • Glawe, D.A., Grove, G.G., and Nelson, M.E. 2006. First Report of Powdery Mildew of Coreopsis Species Caused by Golovinomyces cichoracearum in the Pacific Northwest. Plant Health Progress doi:10.1094/PHP-2006-0405-01-BR.
  • Grove, G.G., and Biggs, A.R. 2006. Production and Dispersal of Conidia of Leucostoma cinctum in Peach and Cherry Orchards Under Irrigation in Eastern Washington. Plant Disease 90: 587-591.
  • Nelson, M.E., Chee, H., Grove, G., Eastwell, K., and Klein, R. 2006. Population Biology of Pseudoperonospora humuli in Oregon and Washington. Plant Disease 90: 1283-1286.
  • Glawe, D. A., and Grove, G. G. 2005. First report of powdery mildew of Scabiosa columbaria (dove pincushions) caused by Erysiphe knautiae in North America. Online. Plant Health Progress doi:10.1094/PHP-2005-1024-01-BR.
  • Biggs, A.R., and Grove, G.G. 2005. Leucostoma canker of stone fruits. The Plant Health Instructor. DOI:10.1094/PHI-I-2005-1220-01.
  • Walsh, J.D., and Grove, G.G. 2005. Repellency and repulsiveness of selected agrichemicals to the two-spotted spider mite Tetranychus urticae. Plant Health Progress doi:10.1094/PHP-2005-1228-01-RS.
  • Grove, G.G., and Lunden, J.L. 2005. Use of petroleum derived spray oils in Washington grapevine powdery mildew management programs. Plant Health Progress doi:10.1094/PHP-2005-0317-01-RS.
  • Grove, G.G. 2004. Perennation of Uncinula necator in vineyards of Eastern Washington. Plant Dis.88:242-247.
  • Nelson, M. E., Eastwell, K. C., Grove, G. G., Barbour, J. D., Ocamb, C. M., and Alldredge, J. R. 2004. Sensitivity of Pseudoperonospora humuli (the causal agent of hop downy mildew) from Washington, Idaho, and Oregon to fosetyl-Al (Aliette). Online. Plant Health Progress doi:10.1094/PHP-2004-0811-01-RS.
  • Grove, G.G., and Boal, R.J. 2003. Use of horticultural mineral oils in management of powdery mildew of cherries in Washington orchards and nurseries. Pages 539-546 In: Spray Oils Beyond 2000, Sustainable Pest and Disease Management. Publ. Veritage Press, Lisarow, NSW, Australia.
  • Grove, G., Eastwell, K., Jones, A., and Sutton, T. 2003. Diseases of apple. Pages 459-488 in: Apples: Botany, Production and Uses, eds. D.C. Ferree and I.J. Warrington, CAB International, Wallington, Oxford, United Kingdom (Invited).
  • Glawe, D.A., Windom, G.E., Grove, G.G., and Falacy, J.S. 2003. First Report of Powdery Mildew of Convolvulus arvensis (Field Bindweed) Caused by Erysiphe convolvuli var. convolvuli in North America. doi:10.1094/PHP-2003-1021-01-HN
  • Grove, G.G. 2002. Influence of temperature and wetness duration on infection of cherry and peach foliage by Wilsonomyces carpophilus. Can. J. Plant Pathol. 24: 40-45.
  • Dugan, F.M., Lupien, S.L., and Grove, G.G. 2002. Incidence, aggressiveness, and in planta interactions of Botrytis cinerea and other filamentous fungi quiescent in grape berries and dormant buds in Central Washington State. J. Phytopathology 150: 375-381.
  • Yamak, F., Peever, T.L., Grove, G.G., and Boal, R.J. 2002. Occurrence and identification of Phytophthora species pathogenic to pear fruit in irrigation water in the Wenatchee River Valley of Washington. Phytopathology 92: 1210-1217.
  • Spotts, R.A., and Grove, G.G. 2002. First Report of Phytophthora syringae Causing Rot on Apples in Cold Storage in the United States. Plant Disease 86 (6): 693. Publication no. D-2002-0417-01N.
  • Jarvis, W., Gubler, W.D., and Grove, G.G. 2002. Epidemiology of powdery mildews in agroecosystems. Pages 169-199 In: The Powdery Mildews, eds. R.R. Belanger, W.R. Bushnell, A.J. Dik, and T.L. Carver. APS Press, St. Paul, MN. (Invited).
  • Olmstead, J.W., Lang, G., and Grove, G.G. 2001. Assessment of sweet cherry powdery mildew severity using digital image analysis. HortScience 36: 107-111.
  • Olmstead, J.W., Lang, G., and Grove, G.G. 2001. Inheritance of powdery mildew resistance in sweet cherry. HortScience 36: 337-340.

Professional Activities

Technical Committee Member, Washington Association of Wine Grape Growers

Senior Editor, Plant Health Progress