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Gummy stem blight/black rot on winter squash fruit


Ring-like pattern which becomes bleached white, giving a petrified appearance of black rot caused by Didymella bryoniae, shown on butternut squash.
Photo courtesy of T.A. Zitter, Cornell University, Ithaca, NY


Black rot symptom developed on butternut fruit in storage, beginning as a bronzed-colored, water-soaked lesion, followed by mycelial development of Didymella bryoniae.Photo courtesy of T.A. Zitter, Cornell University, Ithaca, NY

Early field infection of butternut squash (Cucurbita moschata) with reddish-brown and whitish lesions of black rot.Photo courtesy of T.A. Zitter, Cornell University, Ithaca, NY

Advanced symptoms of black rot on butternut squash
Photo courtesy of T.A. Zitter, Cornell University, Ithaca, NY

Restricted black rot lesions on butternut fruit
Photo courtesy of T.A. Zitter, Cornell University, Ithaca, NY

Black rot symptoms on blue hubbard squash (C. maxima)
Photo courtesy of Cornell University, Ithaca, NY