White Powdery Fungus on Cherry Trees: Mildew or Something Worse?

Ornamental Cherry Decline on Cape Cod

Immediate Steps

1. Take affected leaf/stem sample to Barnstable Cooperative Extension (Deeds & Probate Bldg, across from courthouse).
2. If confirmed powdery mildew: spray "Green Cure" (least-toxic) now and at bud break next spring.
3. If other disease: Extension will prescribe.

Critical Don'ts

• No fertilizer—pushes susceptible growth.
• Water deeply weekly if no rain.

Why Cherries Are Prone

Many fungal/bacterial issues. Accurate ID is essential before treatment.