Buddleia leaf infested with foliar nematode. Photo provided by: Brian Kunkel, Ornamentals IPM Specialist, University of Delaware
Peony leaf blotch. Photo provided by:
Jody Fetzer, New York Botanical Garden, Bugwood.org
Alfalfa mosaic virus. Photo provided by:
Howard F. Schwartz, Colorado State University, Bugwood.org
Fire blight. Photo provided by: William Jacobi, Colorado State University, Bugwood.org
Alfalfa mosaic virus on potato. Photo provided by: Howard F. Schwartz, Colorado State University, Bugwood.org
Cercospora leaf spot on Bigleaf Hydrangea. Photo found at: http://www.aces.edu/pubs/docs/A/ANR-1212/
Cercospora leaf spot on rose. Photo provided by: Paul Bachi, University of Kentucky Research & Education Center, Bugwood.org
Daylily leafstreak. Photo found at: http://www.umass.edu/umext/floriculture/fact_sheets/pest_management/daylily_rust_streak.htm