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Gummy stem blight on pumpkin/gourd leaves

Lesion of gummy stem blight infection of pumpkin. Note presence of pycnidia in center of lesion and early powdery mildew colonies.
Photo courtesy of T.A. Zitter, Cornell University, Ithaca, NY


Foliar lesions are far less common on pumpkin and winter squash, often occurring on the same leaf with powdery mildew (Sphaerotheca fuliginea).
Photo courtesy of T.A. Zitter, Cornell University, Ithaca, NY

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