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Dothistroma needle blight (Dothistroma septosporum) on Spruce (Picea sp.)


4 Images
5369025
Paul Bachi
University of Kentucky Research and Education Center

Infected needles show brown spots with dark border and/or dead tips with dark border between dead and healthy portion of the needle.

5369026
Paul Bachi
University of Kentucky Research and Education Center

Needles show brown spots with dark border.

5369027
Paul Bachi
University of Kentucky Research and Education Center

Close-up of dead needle tip with black, spore-producing bodies ("acervuli") breaking through needle surface.

5369028
Paul Bachi
University of Kentucky Research and Education Center

Spores of the anamorph fungus Dothistroma septosporum.