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Leaf Spot (Cryptocline betularum) on Birch (Betula sp.)


3 Images
5368461
Paul Bachi
University of Kentucky Research and Education Center

Leaves with spots starting out tan and turning gray then white.

5368462
Paul Bachi
University of Kentucky Research and Education Center

Close-up of leaf spots where in some spots the missing tissue in the center was where the spore-producing body of the fungus was located.

5368463
Paul Bachi
University of Kentucky Research and Education Center

Close-up of one spore-producing body ("acervulus") is seen in dark-field observation.