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Viruses on summer squash leaves

Seedling infection of Zucchini Elite Summer Squash (Cucurbita pepo) CMV-NYF
Photo courtesy of T.A. Zitter, Cornell University, Ithaca, NY


Young summer squash (Cucurbita pepo) infection
Photo courtesy of T.A. Zitter, Cornell University, Ithaca, NY

Yellow summer squash (Cucurbita pepo) infection. Note color breaking on fruit. CMV-NY
Photo courtesy of T.A. Zitter, Cornell University, Ithaca, NY

CMV-NY infected zucchini summer squash (Cucurbita pepo)
Photo courtesy of T.A. Zitter, Cornell University, Ithaca, NY


Summer squash displays severe downward cupping along the midvein and leaf reduction caused by Cucumber Mosaic Cucumovirus
Photo courtesy of T.A. Zitter, Cornell University, Ithaca, NY


Summer squash leaves show mosaic symptoms caused by Watermelon Mosaic Potyvirus (formerly WMV-2).
Photo courtesy of T.A. Zitter, Cornell University, Ithaca, NY


Mild mosaic symptoms as seen on foliage of summer squash (Cucurbita pepo) and melon (Cucumis melo) following infection with Watermelon Mosaic Potyvirus
Photo courtesy of T.A. Zitter, Cornell University, Ithaca, NY


Mosaic and rugosity of foliage and color breaking on fruit of straightneck yellow squash caused by Watermelon Mosaic Potyvirus (formerly WMV-2).

Note mosaic on foliage but absence of color breaking on fruit infected with Watermelon Mosaic Potyvirus (formerly WMV-2). Presence of a yellow precocious gene in the variety 'Multipik' and other varieties prevents color breaking from occurring.
Photos courtesy of T.A. Zitter, Cornell University, Ithaca, NY


Leaf distortion and plant stunting caused by Papaya Ringspot Potyvirus
Photos courtesy of T.A. Zitter, Cornell University, Ithaca, NY

Extreme leaf filiformity of summer squash as seen with several cucurbit viruses including Papaya Ringspot Potyvirus
Photos courtesy of T.A. Zitter, Cornell University, Ithaca, NY

Leaf and malformation of zucchini summer squash (Cucurbita pepo) caused by Papaya Ringspot Potyvirus
Photo courtesy of T.A. Zitter, Cornell University, Ithaca, NY

Papaya Ringspot Potyvirus produces strong mosaic, distortion, and deep leaf serration.
Photo courtesy of T.A. Zitter, Cornell University, Ithaca, NY


Advanced symptoms of Zucchini Yellow Mosaic Potyvirus on zucchini summer squash (Cucurbita pepo)
Photo courtesy of R. F. Davis, Rutgers University, New Brunswick, NJ