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Leaf spot (Tubakia dryina) on Oak (Quercus sp.)


11 Images
5368647
Paul Bachi
University of Kentucky Research and Education Center

Tan/brown spots with broad, darker brown border.

5368648
Paul Bachi
University of Kentucky Research and Education Center

Close-up of one spot on upperside of leaf with raised, dark, spore-producing bodies ("acervuli").

5368649
Paul Bachi
University of Kentucky Research and Education Center

One spore-producing body ("acervulus").

5368650
Paul Bachi
University of Kentucky Research and Education Center

5405363
Paul Bachi
University of Kentucky Research and Education Center

Upper surface of red oak leaves with spots infected with the fungus Tubakia dryina.

5405364
Paul Bachi
University of Kentucky Research and Education Center

Lower surface of red oak leaves with spots infected with the fungus Tubakia dryina.

5405365
Paul Bachi
University of Kentucky Research and Education Center

Close up of upper surface of red oak leaves with spots infected with the fungus Tubakia dryina.

5405359
Paul Bachi
University of Kentucky Research and Education Center

Pycnothyria and conidia of Tubakia dryina.

5405360
Paul Bachi
University of Kentucky Research and Education Center

Pycnothyrium and conidia of Tubakia dryina.

5405361
Paul Bachi
University of Kentucky Research and Education Center

Pycnothyrium and conidia of Tubakia dryina.

5405362
Paul Bachi
University of Kentucky Research and Education Center

Conidia of Tubakia dryina.