Michigan State University Extension
Ornamental Plants plus Version 3.0 - 00001702
11/12/99
Hawthorn Leaf Blight
This leaf disease can completely defoliate hawthorn by the
end of August.
The disease overwinters in cankers on the twigs as well as
on fallen infected leaves.
The first symptom is small brown spots on the leaves. If
examined closely, small black spots may be seen in the
brown spots. The leaves fall later in the summer. The
disease will be worse in wet seasons.
Paul's Scarlet Hawthorn is very susceptible to leaf blight.
Resistant hawthorns include Cockspur (Crataegus crus-galli)
and Washington Hawthorn (Crataegus phaenopyrum)
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This file was generated from data base ZZ on 01/19/00.
Data base ZZ was last revised on 11/12/99.
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