Diseases of ash (Fraxinus spp.), birch (Betula spp.) and alder (Alnus spp.)
The common ash (Fraxinus excelsior) occurs throughout most of Europe, and is widespread in Britain, especially on calcareous sites. In other parts of Europe, the manna ash, F. ornus (often planted in British parks and gardens), is native in southern Europe and Asia Minor, and the narrow-leaved ash, F. angustifolia, and the Caucasian ash, F. oxycarpa, both from southern Europe, are occasionally planted in parks and gardens in Britain. Also found in European parks and gardens are various species from Asia and North America.
KeywordsPowdery Mildew Leaf Spot Decay Fungus Fraxinus Excelsior Ornamental Tree
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