Dothichiza caroliniana and Gloeocercospora inconspicua
In late summer, the double spot fungus develops a secondary necrotic area around the original lesion spreading in an irregular to fan-shaped pattern. The gloeocercospora leaf spot appears on the foliage by mid-summer as large dark brown, circular to angular lesions surrounded by a dark border.
Double spot:
- Initially is from 1/16 inch to 1/8 inch in diameter.
- In late summer, the fungus develops a secondary necrotic area around the original lesion spreading in an irregular to fan-shaped pattern. The dark border surrounding the original lesion persists and the large necrotic area surrounds or is to one side of the original lesion.
Gloeocercospora Leaf Spot:
- Is of minor importance as a leafspot disease.
- It appears on the foliage by mid-summer as large dark brown, circular to angular lesions surrounded by a dark border.
Reference: Cline, W.O. “Bill.” Leaf Diseases of Blueberry. Retrieved 02 April 2010.