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and can be confused with one another. Most leaf spots are not serious threats to the health of the tree.
The leaf spots caused by Diacula sp. are irregular in shape, vary in size, and have light brown centers with purplish borders. With a hand lens, you may be able to see tiny brown specks in the brown part of the spots. These are fruiting bodies of the pathogen. They may be found on either the upper or lower surface of the spots.
Leaf spots may enlarge, coalesce, and blight large portions of
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