Powdery Mildew

Powdery mildew is the common term for a group of plant diseases. In grapevines, the disease is caused by the fungus originally named Uncinula necator, now renamed Erysiphe necator.

Infection and subsequent disease development is influenced by many factors including the presence of infected grapevine tissue, spores, and the occurrence of particular weather conditions. Disease progress early in the season may be slow depending on weather conditions, but is not usually impeded in most areas of Australia.

Practical

Characteristics of Powdery Mildew – Vitinotes
https://www.awri.com.au/wp-content/uploads/powdery_mildew_characteristics.pdf

Symptoms of Powdery mildew (with pictures) – Vitinotes
https://www.awri.com.au/wp-content/uploads/powdery_mildew_symptoms.pdf

Managing Powdery Mildew – Vitinotes
https://www.awri.com.au/wp-content/uploads/powdery_mildew_manage.pdf

Monitoring for Powdery Mildew – Vitinotes
https://www.awri.com.au/wp-content/uploads/powdery_mildew_monitor.pdf

Powdery mildew of grapes in Western Australia (practical outlines)
https://www.agric.wa.gov.au/table-grapes/powdery-mildew-grapevines-western-australia?page=0%2C4

PMapp: A mobile app for assessing powdery mildew (with links to downloads from apple and android sites)
 https://www.vineyardteam.org/files/resources/PMapp.pdf

Technical

Powdery Mildew
https://www.wineaustralia.com/growing-making/pest-and-disease-management/managing-powdery-mildew