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Leaf spot (Septoria spp.) on Poplar (Populus spp.)


6 Images
5369056
Paul Bachi
University of Kentucky Research and Education Center

Dark brown, angular spots with gray flecks.

5369057
Paul Bachi
University of Kentucky Research and Education Center

Close-up of the underside of the leaf showing dark brown, angular spots with gray flecks.

5369058
Paul Bachi
University of Kentucky Research and Education Center

One infected area of leaf where dark brown, spore-producing bodies ("pycnidia") can be seen within the spots.

5369059
Paul Bachi
University of Kentucky Research and Education Center

Close-up of infected area with dark brown, spore-producing bodies ("pycnidia").

5369060
Paul Bachi
University of Kentucky Research and Education Center

Dark-field observation of long, thin spores of a species of the fungus Septoria.

5369061
Paul Bachi
University of Kentucky Research and Education Center

Long, thin spores of a species of the fungus Septoria.