Common Diseases
Armillaria root rot
Botrytis blight (Gray mold)
Cankers
Crown gall
Damping-off
Dead roots
Dodder
Downy mildew
Dwarf mistletoe
Galls
Leaf spots and blights
Nectria cankers
Phytophthora root rot
Powdery mildew
Pseudomonas bacterial canker
Root rots
Rusts
Sclerotinia white mold
Tubercularia canker
Verticillium wilt
Viruses
Oregon Department of Agriculture