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Twig dieback (Sclerotinia spp.) on Forsythia (Forsythia sp.)


4 Images
5368545
Paul Bachi
University of Kentucky Research and Education Center

Several infected stems show dieback from the point of infection toward the tip of the stem.

5368546
Paul Bachi
University of Kentucky Research and Education Center

Hard, black survival structure called a “sclerotia” inside the infected stem.

5368547
Paul Bachi
University of Kentucky Research and Education Center

Infected stem showing a pattern of alternating lighter and darker copper/brown lines.

5368548
Paul Bachi
University of Kentucky Research and Education Center

Fungal mycelium after infection of flower. Disease starts as a flower infection with the fungus then working its way into the stem.