Plant Pathology Graduate Program

James E. Adaskaveg

James E. Adaskaveg
Office: 951-827-7577
242 Fawcett Laboratory
Office Hours: , not specified - not specified
Email: jim.adaskaveg@ucr.edu

James E. Adaskaveg

Professor of Plant Pathology - Plant  Pathologist, Mycologist, and Epidemiologist

Biology, epidemiology, and ecology of plant pathogenic fungi
PhD Plant Pathology 1986 -- University of Arizona 

MS Plant Pathology 1984 -- University of Arizona 
BS Agronomy 1982 -- University of Connecticut

Biography & Research Interests

Our research includes investigations on the biology, ecology, epidemiology, and management of diseases on tree crops grown in California. Specifically, our research focuses on the epidemiology and management of foliar diseases caused by fungal and bacterial tree pathogens. Research includes mycology, ultra-structure of host-pathogen relationships, biology of wood decay fungi, biological and molecular techniques for the detection and identification of fungi, and development of innovative management practices for pre- and postharvest disease control of fruit crops. We have developed exciting new strategies for the identification, detection, and management of pre- and postharvest diseases of tree fruit using reduced risk fungicides and disease forecasting programs in California. Recent advances include:

  1. Sampling and detection strategies of Septoria citri, causal agent of Septoria spot of citrus.
  2. Epidemiological and mesoclimate forecasting model for Septoria spot. 
  3. Introduction of three new postharvest fungicides for citrus and a forth one pending; two new postharvest fungicides for pome fruit; and three new postharvest fungicides for stone fruit.
  4. Development of sanitation and fungicide treatments against sour rot of peaches and nectarines.
  5. Forecasting Alternaria leaf spot of Almond using the DSV model and identification of two new fungicides for disease management.
  6. Evaluation of new treatments for sweet cherry diseases - brown rot, gray mold, and powdery mildew.
  7. Characterization of QoI fungicide resistance in scab populations on almond and pear.
  8. Studies on the mode of action of phenylpyroles and anilinopyrimidines in Penicillium digitatum.


  • Lee M. Hutchins Award  2009, American Phytopathological Society
  • Albert G. Salter Memorial Award 2006, for contributions made to the California Citrus Industry, presented by the California Citrus Quality Council.
  • Cherry Man of the Year 2003, for contributions made to the Sweet Cherry Industry of California, presented by the Cherry Shippers and Packers of California.
  • Almond Research Appreciation Award 1997, for contributions made to the Almond Industry of California, presented by the Almond Board of California.
  • Student Paper Award Recipient, American Phytopathological Society Pacific Division, June 1986 (Phytopathology 76(8):841).

Offices -

  • President, American Phytopathology Society-Pacific Division, 2002-03, Kona, Hawaii.


Selected Recent Articles - 

  • Soto-Estrada, A. and J.E. Adaskaveg. 2003. New Fungicides and Inoculum-precipitation Based Application Strategies for Managing Peach Rust in California. Plant Dis. 87:1094-1101.
  • Diéguez-Uribeondo, J., Förster, H., and Adaskaveg, J. E. 2003. Digital image analysis of internal light spots of appressoria of Colletotrichum acutatum. Phytopathology 93: 923-930.
  • Förster, H., L. Kanetis, and J.E. Adaskaveg. 2004. Spiral gradient dilution, a rapid method for determining growth responses and EC50 values in fungus-fungicide interactions. Phytopathology 94:163-170.

  • Soto-Estrada, and J. E. Adaskaveg. 2004. Temporal and quantitative analyses of stem lesion development and foliar disease progression of peach rust in California. Phytopathology 94:52-60.

  • Adaskaveg, J.E., Förster, H., Gubler, W.D., Teviotdale, B.L., and Thompson, D.F. 2004. Reduced risk fungicides: A new way of managing brown rot and other fungal diseases of stone fruit crops in California. Cal. Agricult. 59: 109-114.

  • Diéguez-Uribeondo, J., H. Förster, A. Soto-Estrada, and J. E. Adaskaveg. 2005. Subcuticular-intracellular hemibiotrophic and intercellular necrotrophic development of Colletotrichum acutatum on almond. Phytopathology 95:751-758.

  • Soto-Estrada, A., D.A. De Mason, H. Förster, and J. E. Adaskaveg. 2005. Initial infection and colonization of leaves and stems of cling peach by Tranzschelia discolor. Phytopathology 95:942-950.

  • Peres, N. A., L. W. Timmer, J. E. Adaskaveg, and J. C. Correll. 2005. Lifestyles of Colletotrichum acutatum. Plant Dis. 89:784-796.

  • Agostini, J. P., N. A. Peres, S. J. MacKenzie, J. E. Adaskaveg, and L.W. Timmer. 2006. Effect of fungicides and storage conditions on postharvest development of citrus black spot and survival of Guignardia citricarpa in fruit tissues. Plant Dis. 90:1419-1424.

  • Forster, H., G.F. Driever, D.C. Thompson, and J.E. Adaskaveg. 2007. Postharvest decay management for stone fruit crops in California using the "reduced risk" fungicides fludioxonil and fenhexamid. Plant Dis. 91:209-215.

  • Peres, N. A., R. Harakava, G. C. Carroll, J. E. Adaskaveg, and L. W. Timmer. 2007. Comparison of molecular procedures for detection and identification of Guignardia citricarpa and G. mangiferae.  Plant Dis. 91: 525-531.

  • Kanetis, L., H. Forster, and J. E. Adaskaveg. 2007. Comparative efficacy of the new postharvest fungicides azoxystrobin, fludioxonil, and pyrimethanil for managing citrus green mold. Plant Dis. 91: 1502-1511.

  • Kanetis, L., H. Forster, and J. E. Adaskaveg. 2008. Baseline sensitivities for new postharvest fungicides againstPenicillium species on citrus and multiple resistance evaluations in P. digitatum. Plant Dis. 92: 261-269.

  • Kanetis, L., H. Forster, and J. E. Adaskaveg. 2008. Optimizing efficacy of new postharvest fungicides and evaluation of sanitizing agents for managing citrus green mold. Plant Dis. 92: 301-310.
  • Kanetis, L., H. Forster, C. Adams, K. Borkovich, and J. E. Adaskaveg. 2008. Characterization of genetic and biochemical mechanisms of fludioxonil and pyrimethanil resistance in field isolates of Penicillium digitatum. Phytopathology 98: 205-214.

  • Dieguez-Uribeondo, J., Forster, H., and Adaskaveg, J.E. 2008. Visualization of localized pathogen-induced pH modulation in almond tissues infected by Colletotrichum acutatum using confocal scanning laser microscopy. Phytoatphology 98: 1171-1178.

 Selected Book Chapters -

  • Adaskaveg, J.E. and H. Förster. 2000. Occurrence and management of anthracnose epidemics caused by Colletotrichumspecies on tree fruit crops in California. IN: Colletotrichum, Host Specificity, Pathology, and Host Pathogen Interaction.  S. Freeman, D. Prusky and M. Dickman (eds). American Phytopathological Society Press, St. Paul, MN. pp 317-336.

  • Adaskaveg, J. E., H. Förster, and N. F. Sommer. 2002. Principles of postharvest pathology and management of decays of edible horticultural crops. In: Postharvest Technology of Horticultural Crops, 4th Edition, Edited by A. Kader. DANR Publication 3311, University of California, Oakland, CA. Pages 163-195.

  • Adaskaveg, J. E., G. Schnabel, and H. Förster. 2008. Diseases of Peach Caused by Fungi and Fungal-Like Organisms: Biology, Epidemiology, and Management. Pages 352-406 in “The Peach”, edited by D. Layne and D. Bassi. CABI Publications. 22 Chapters.

More Information

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University of California, Riverside
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Riverside, CA 92521
Tel: (951) 827-1012

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Graduate Program in Plant Pathology
1140 Batchelor Hall

Tel: (800) 735-0717 or (951) 827-5688
Fax: (951) 827-5517
E-mail: laura.mcgeehan@ucr.edu

Department of Plant Pathology and Microbiology
Boyce Hall 1463

Tel: (951) 827-3598
Fax: (951) 827-4294
E-mail: margarita.flores@ucr.edu