Paul Bachi, University of Kentucky Research and Education Center, Bugwood.org
Tan/brown spots with broad, darker brown border.
Paul Bachi, University of Kentucky Research and Education Center, Bugwood.org
Close-up of one spot on upperside of leaf with raised, dark, spore-producing bodies ("acervuli").
Paul Bachi, University of Kentucky Research and Education Center, Bugwood.org
One spore-producing body ("acervulus").
Paul Bachi, University of Kentucky Research and Education Center, Bugwood.org
Paul Bachi, University of Kentucky Research and Education Center, Bugwood.org
Pycnothyria and conidia of Tubakia dryina.
Paul Bachi, University of Kentucky Research and Education Center, Bugwood.org
Pycnothyrium and conidia of Tubakia dryina.
Paul Bachi, University of Kentucky Research and Education Center, Bugwood.org
Pycnothyrium and conidia of Tubakia dryina.
Paul Bachi, University of Kentucky Research and Education Center, Bugwood.org
Conidia of Tubakia dryina.
Paul Bachi, University of Kentucky Research and Education Center, Bugwood.org
Upper surface of red oak leaves with spots infected with the fungus Tubakia dryina.
Paul Bachi, University of Kentucky Research and Education Center, Bugwood.org
Lower surface of red oak leaves with spots infected with the fungus Tubakia dryina.
Paul Bachi, University of Kentucky Research and Education Center, Bugwood.org
Close up of upper surface of red oak leaves with spots infected with the fungus Tubakia dryina.
Tan/brown spots with broad, darker brown border.
Close-up of one spot on upperside of leaf with raised, dark, spore-producing bodies ("acervuli").
One spore-producing body ("acervulus").
Pycnothyria and conidia of Tubakia dryina.
Pycnothyrium and conidia of Tubakia dryina.
Pycnothyrium and conidia of Tubakia dryina.
Conidia of Tubakia dryina.
Upper surface of red oak leaves with spots infected with the fungus Tubakia dryina.
Lower surface of red oak leaves with spots infected with the fungus Tubakia dryina.
Close up of upper surface of red oak leaves with spots infected with the fungus Tubakia dryina.