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Cherry Leaf Spot: Fungal Disease on Flowering Cherry

A cherry blossom tree drops leaves with brown patches after flowering. This is cherry leaf spot (Blumeriella jaapii). Fungus overwinters on fallen leaves; spores infect new leaves in spring via moisture. Spots enlarge, turn brown/purple, merge, cause yellowing and early drop. Control: rake/destroy fallen leaves. Spray fungicides (dodine, fenarimol, tebuconazole, captan, chlorothalonil) starting after bloom, continuing until 2 weeks post-harvest. Check local nursery for labeled products.

Management

Sanitation: remove infected leaves.
Fungicide schedule: post-bloom to summer.
Improve air circulation.

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