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Bacterial Wilt on summer squash


Summer Squash:CUCURBIT:Bacterial Wilt (Erwinia tracheiphila/cucumber beetles)Photo courtesy of T.A. Zitter, Cornell University, Ithaca, NY

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 on left courtesy of B. Bruton, USDA-ARS


General chlorosis and collapse on summer squash infected with Erwinia tracheiphila.
Photo courtesy of T.A. Zitter, Cornell University, Ithaca, NY


Plugging of xylem vessels of summer squash infected with Erwinia tracheiphila.
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

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


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