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 ...
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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 ...
More Information