What you will see
Yellow to brown patches on the upper leaf surface, with a white, gray or purple coating underneath.
The source says: it is one of the most destructive diseases of hops.
When to look
Summer – fallHow to protect
- Prevention
- Plant thinly and control weeds for airflow; in a greenhouse avoid leaves staying wet for long.
- By handPick off and destroy affected leaves as soon as they appear; remove heavily affected plants.


















