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Cooperative Extension: Insect Pests, Ticks and Plant Diseases

Ninebark – Powdery Mildew 1

Sphaerotheca macularis

Ninebark – Powdery Mildew 1 Signs & Symptoms

Powdery mildew on leaf underside

Ninebark – Powdery Mildew 1 Pathogen

: Powdery mildew conidium

: Powdery mildew conidia

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