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PP359: Leaf Spot Diseases of Strawberry

Figure 9. Powdery mildew caused by the fungus Podosphaera aphanis: A) fungal growth on lower leaf surfaces; B) small black fruiting bodies (cleistothecia) on the undersides of infected leaves; C) leaf cupping and curled margins of diseased leaves; and D) irregular red or purple/brown patches on infected leaves of some cultivars.

Credit: UF/IFAS GCREC