Sand Cherry Powdery Mildew: Fungicide or Horticultural Oil Treatment

White film and curling leaves on new sand cherry bushes in dry-then-wet weather is powdery mildew.

Treatment

• Benomyl (fungicide) or SunSpray horticultural oil (if temps < 85–90°F).
• Spray every 7–10 days for 2–3 applications.
• Trim off severely distorted leaves.

Condition will resolve with treatment.