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Gummy Stem Blight/ Black Rot of Cucurbits

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Foliar symptoms of gummy stem blight (Didymella bryoniae) on cantaloupe (melon) may consist of water-soaked lesions, irregularly shaped circular lesions or less commonly as interveinal necrotic tissue when the affected area has dried.

Foliar lesions are far less common on pumpkin and winter squash, often occurring on the same leaf with powdery mildew (Sphaerotheca fuliginea).

Photos courtesy of T.A. Zitter, Cornell University, Ithaca, NY

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Link to the Factsheet on Gummy Stem Blight/ Black Rot of Cucurbits

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