Virus Diagnostics

Control of plant diseases begins with accurate identification of the causal agent; viruses are particularly difficult to identify by symptoms alone. The WSU Plant Pest Diagnostic Clinic offers ELISA (Enzyme-Linked Immunosorbent Assay), and PCR (Polymerase Chain Reaction) testing options for rapid and accurate information to our customers. Please contact Rachel Bomberger by email ( or phone (509-335-3292) for details about testing services.

Diagnostic Tests Available

  • Alfalfa: Alfalfa mosaic virus
  • Apples & Pears: Apple mosaic virus, Apple chlorotic leaf spot virus, Apple stem grooving virus, & Apple stem pitting virus.
  • Beans: Alfalfa mosaic virus, Bean common mosaic virus, & Bean common necrosis virus, & Tomato ringspot virus.
  • Berries: Blueberry scorch virus, Blueberry shock virus, & Tomato ringspot virus.
  • Cherries and other stone fruit: Cherry leaf roll virus, Prune dwarf virus, & Prunus necrotic ringspot virus.
  • Grapevines: Grapevine leafroll-associated virus-3, Grapevine red blotch virus, & Xylella fastidiosa (Pierce’s Disease).
  • Hops: Apple mosaic virus, Hop mosaic virus, & Hop stunt viroid.
  • Vegetables: Asparagus virus-2, Cucumber mosaic virus & Tomato ringspot virus