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Gummy stem blight (Didymella bryoniae) on Watermelon (Citrullus lanatus)


10 Images
5369019
Paul Bachi
University of Kentucky Research and Education Center

Dark brown leaf spots often with concentric rings.

5369020
Paul Bachi
University of Kentucky Research and Education Center

Close-up of dark brown leaf spot with concentric rings.

 

5369017
Paul Bachi
University of Kentucky Research and Education Center

Conidia enbedded in infected leaf tissue under darkfield observation.

5369018
Paul Bachi
University of Kentucky Research and Education Center

Asexual spores of the fungal anamorph, Phoma cucurbitacearum.

5368887
Paul Bachi
University of Kentucky Research and Education Center

Asexual spore-producing structures "pycnidia" with spores oozing out, seen in infected tissue.

5368351
Paul Bachi
University of Kentucky Research and Education Center

Stained, asexual spores of the fungal anamorph, Phoma cucurbitacearum.

5368857
Paul Bachi
University of Kentucky Research and Education Center

Dark brown leaf spots often with concentric rings.

5368858
Paul Bachi
University of Kentucky Research and Education Center

Close-up of leaf spots with concentric rings.

5368859
Paul Bachi
University of Kentucky Research and Education Center

Close-up of leaf spots with concentric rings. Spots often occur along margins of leaves.

5368860
Paul Bachi
University of Kentucky Research and Education Center

Earlier stage of leaf spot development before all infected tissue turns dark brown.