Walter Mahaffee

Research Plant Pathologist, USDA-ARS & Courtesy Faculty, Dept. of Botany and Plant Pathology
mahaffew [at]

Office: 541-738-4036 x4035

Horticulture Crops Research Lab

3420 NW Orchard Avenue

3420 NW Orchard Avenue
Corvallis, OR 97331

Research focuses on understanding the ecology of microorganisms on plant surfaces, and applying that knowledge to reduce disease development in agronomic settings while enhance the economic and sustainable production of horticultural crops.  Current projects include (1) characterize the biology of foliar and fruit pathogens, particularly powdery mildews and Botrytis spp.; (2) monitoring and mitigation of fungicide resistance; (3) inoculum monitoring as a decision aid for disease management, (4) pathogen dispersion and simulation modeling.

Research Group Members

Research Assistants/Associates

  • Tara Neill - Lab Manager
  • Hannah Soukup

Graduate Students

  • Sarah Lowder
  • Alex Wong

Undergraduate Students

  • Eliza Allen
  • Kiersten Brophy
  • Savana Espinosa
  • Haylee Garret
  • Destiny Perkins
  • Danielle Scutero

Profile Field Tabs

Affiliated with: 
Ag Botany / Plant Path
Beyond OSU