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Viruses on cucumber leaves

Susceptible Poinsett cucumber (Cucumis sativus) infected with CMV-NY. Note effects on foliage and fruit.
Photo courtesy of T.A. Zitter, Cornell University, Ithaca, NY

Tobacco Ringspot Nepovirus infections appear as yellowish mosaic on newly infected leaves of melon and cucumber
Photo courtesy of R. Provvidenti, NYSAES, Geneva, NY