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"Black rot" in its leaf phase, called "Frogeye leaf spot" (Botryosphaeria obtusa) on Apple (Malus X domestica)


4 Images
5368721
Paul Bachi
University of Kentucky Research and Education Center

Irregular brown spots/blotches with lighter centers and darker borders on leaves

5368722
Paul Bachi
University of Kentucky Research and Education Center

Irregular brown spots/blotches with lighter centers and darker borders on leaves

5368723
Paul Bachi
University of Kentucky Research and Education Center

A single black, spore-producing body ("pycnidia")

5368724
Paul Bachi
University of Kentucky Research and Education Center

Dark, asexual conidia of the fungus Spheropsis malorum coming from single pycnidia.