Horsechestnut Leaf Blotch: Symptoms and Management

Disease Reference Table

Disease	Symptoms	Pathogen/Cause	Management
Leaf Blotch	Small irregular reddish-brown spots and large blotches with yellow halos in late June/early July. Most infected leaves brown and fall prematurely. Tiny black fruiting structures in dead areas.	Guignardia aesculi	For high-value trees, apply fungicide in early summer.

Prepared by Gary W. Moorman, Professor of Plant Pathology.

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