Powdery Mildew on Cherry Tree: Identification and Control

Fine white powdery substance on leaf undersides of a 2-year-old cherry tree.

Diagnosis: Powdery Mildew

Common fungal disease (Podosphaera species) on cherries. Appears as white talcum-like coating on leaves, shoots, sometimes fruit. Favored by high humidity, moderate temps, shade.

Management

• Cultural: Prune for air circulation; avoid overhead watering; full sun.
• Resistant varieties: Consider for future plantings.
• Fungicides: Sulfur, potassium bicarbonate, neem oil, or synthetic options (myclobutanil, propiconazole). Apply at first sign, repeat per label.
• Timing: Critical—protect new growth. Stop before harvest per label.

Resource

Purdue Extension guide: Powdery Mildew on Fruit Trees

Consult local nursery for region-specific product recommendations.