Grape Diseases

Foliar and Fruit Diseases

Grape Powdery Mildew
- Grapevine Powdery Mildew: Eastern Washington – WSU #EM058e
- WESTERN WA – Grapevine Powdery Mildew: Western Washington – WSU #EM059e
- ESPAÑOL – Oídio de la Uva – WSU #EM058ES
Botrytis Bunch Rot
- Botrytis Bunch Rot – WSU #FS046e
- ESPAÑOL – Prodredumbre por Botrytis (.pdf) – WSU #FS046ES
Phomopsis Cane and Leaf Spot
- Grape Phomopsis Cane and Leaf Spot – PNW Disease Handbook
- Phomopsis Cane and Leaf Spot of Grapes – eXtension.org
- Phomopsis Cane and Leaf Spot of Grapes – The Ohio State
- Phomopsis Cane and Leaf Spot – UC-Davis
Sour Rots
- Summer Rots (Sour Rot) – UC-Davis

Wood and Root Diseases

Crown Gall of Grape
- CrownGall (.pdf) – WSU Whitepaper
- Crown Gall Research Update (.pdf) – Cornell University
Eutypa Dieback
- Eutypa Dieback – UC-Davis
Esca / Petri Disease / Young Vine Decline
- Esca/Petri Disease – UC-Davis
Armillaria Root Rot
- Armillaria Root Rot – UC-Davis
Pierce’s Disease of Grape
- Pierce’s Disease – UC-Davis

Virus Diseases

Please also see our Grapevine Virology webpage.

Virus Diagnostic Services – The Clean Plant Center Northwest
Virus Disease Factsheets.
- Grapevine Leafroll Disease [English] – WSU EB2027e
- Grapevine Leafroll Disease [Spanish] – WSU EB2027eS
- Rupestris Stem Pitting – WSU Webpage
- Corky Bark Disorder – WSU Webpage
- Grapevine Red Blotch Disease (.pdf) – NCPN Factsheet
- Please also see our Grapevine Virology webpage.

Disease Management and Models

Disease development is closely linked to weather. AgWeatherNet has models for important disease management decisions.

Viticulture: Self-Directed Courses

Take individual programs from the Viticulture Certificate Course, and custom-build your knowledge base. Courses on Fungal and Viral Diseases, Pest Management and Biocontrol, Weed Management, and Nematodes are all available.

Browse Self-Directed Courses

Fungicide Resistance Action Committee (FRAC)

FRAC is an international working group designed to help mitigate the development of fungicide resistance in many of the critical fungal pathogens in modern plant production.