Fly speck

Fly speck - Zygophiala jamaicensis
Annemiek Schilder, MSU Plant Pathology

Flyspeck is characterized by small, black specks on the berries. The specks are caused by a fungus, which grows superficially on the fruit surface. The fungus also infects many cultivated and wild hosts, which serve as a reservoir of inoculum. High relative humidity is conducive to development of this disease.

Additional information

Search MSU Fruit CAT Alert newsletter for articles.
MSU Diagnostic Services
Special grape disease problems and controls (from Michigan Fruit Management Guide)


Photo: A. Schilder

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in collaboration with MSU Extension and the Michigan Agricultural Experiment Station.
Updated 12/20/07 Contact: J.N. Landis.