Mycosphaerella leaf spot
Disease
Mycosphaerella leaf spot
Mycosphaerella pyri (Auersw.) Boerema
Distribution: Widespread, although of minor economic importance in sprayed commercial orchards.
Photos
Small, black pycnidia develop in the interior of older lesions.
Turner Sutton, NC State Univ.
A
Lesions are primarily circular, 3–5 mm in diameter, and have a grayish white interior, with a distinct purple margin; small, black pycnidia develop in the interior of older lesions (A). The fungus occasionally attacks the fruit, producing small, dark lesions.
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