symptoms
Symptoms
- circleYellow patches on upper leaf surface
- circleGrey-purple fuzzy growth on undersides
- circleWilting
help
Causes
Caused by Peronospora and Pseudoperonospora species. Spreads in cool, humid conditions.
healing
Treatment
Remove affected material. Apply copper fungicide or phosphonate.
shield
Prevention
Avoid overcrowding. Water in morning. Choose resistant varieties.