Dr. Phyto
grape powdery mildew
Erysiphe necator
Symptoms
Powdery white patches on leaves and berries.
Plants affected
Easily confused with
- grape downy mildew
How to tell them apart: Grape powdery mildew (Erysiphe necator): dusty grey-white coating on BOTH leaf surfaces, shoots and berries, thrives in dry warm shade, no oily spots. Grape downy mildew (Plasmopara viticola): translucent yellow oil spots on the UPPER surface with a white cottony down ONLY on the lower surface beneath them, needs leaf wetness/rain.
Treatment
Dr. Phyto builds a dated, step-by-step treatment plan with country-approved products — start a free diagnosis to get yours.
Common questions
- How do I recognise grape powdery mildew on grape vine?
- Powdery white patches on leaves and berries.
- Do I have to report grape powdery mildew?
- No. grape powdery mildew is not a notifiable organism, so there is nothing to report to an authority. Treat it as a normal garden problem.
- How is grape powdery mildew treated?
- Mainly with biological and cultural measures — removing affected material, changing the conditions that favour it, and treating with agents approved in your country. The exact steps and their timing depend on the plant, the season and where you live: Dr. Phyto works them out in a free diagnosis.
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