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Bacterial Wilt on pumpkin/gourd

Bacteria spread to adjacent vessels through dissolved cell wall, clogging vessels of the plant and causing discoloration of the xylem vessels.
Photo courtesy of T.A. Zitter, Cornell University, Ithaca, NY


Bacteria continue to multiply, forming visible masses of ooze
Photo courtesy of B. Bruton, USDA-ARS





Stunted, tufted growth at nodes of pumpkin plants (in all 3 photos).
Photos courtesy of T.A. Zitter, Cornell University, Ithaca, NY



Wilted pumpkin vines of plant infected with Erwinia tracheiphila.
Photo courtesy of T.A. Zitter, Cornell University, Ithaca, NY

Necrotic, rotting pumpkin plant infected byErwinia tracheiphila in early growth stages.
Photo courtesy of T.A. Zitter, Cornell University, Ithaca, NY

Root and lower stem feeding by cucumber beetle larvae.
Photo courtesy of M.P. Hoffmann, Cornell University




Bacteria multiply in sap at the margins of wounds.Photo courtesy of B.Bruton, USDA-ARS