Grape Diseases

Foliar and Fruit Diseases

• Grape Powdery Mildew
  • Grapevine Powdery Mildew: Eastern Washington – WSU #EM058e
  • WESTERN WA – Grapevine Powdery Mildew: Western Washington (.pdf) – 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
  • 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.

• Grapevine Leafroll Disease [English] – WSU EB2027e
• Grapevine Leafroll Disease [Spanish] (.pdf) – WSU EB2027eS
• Rupestris Stem Pitting – WSU Webpage
• Corky Bark Disorder – WSU Webpage
• Grapevine Red Blotch Disease (.pdf) – NCPN Factsheet

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.

• FRAC Codes and Resistance Management Strategies