Anthracnose of Ash Trees

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Cynthia Ash

A common type of fungal leaf spot on ash trees is anthracnose. This disease, caused by the fungus Discula sp., survives winter on infected plant tissue. During the spring and summer when the weather is cool and wet, spores are produced on infected tissue. These spores are spread by wind and splashing rain to buds, shoots, and expanding leaves where new infections occur.

Reference
Stack, Robert W., and Kenneth Conway. 1986. Gleosporium and Gnomonia Leaf Diseases of Broadleaf Trees. In Diseases of Trees in the Great Plains. Riffle, J.W. and G.W. Peterson, editors. 16-19.

P413A
Revised 1/99
Chad Behrendt, Crystal Floyd

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