Disease Note

Cucumber Vein Yellowing Virus on Cucumber in Jordan. A. M. Al-Musa, S. J. Qusus, and A. N. Mansour, Department of Plant Pathology, University of Jordan, Amman. Plant Disease 69:361, 1985. Accepted for publication 18 December 1984. Copyright 1985 The American Phytopathological Society. DOI: 10.1094/PD-69-361c.

In the Jordan Valley, a virus isolated from stunted parthenocarpic cucumbers (Cucumis sativus L.) showing vein yellowing symptoms was identified as cucumber vein yellowing virus (CVYV).  The virus was transmitted by whitefly (Bemisia tabaci Genn.) and inefficiently by rub inoculation.  The host range was restricted to cucurbitaceous plants, including C. sativus var. marbella, C. melo, and C. melo var. flexousus; Cucurbita pepo, C. moschata, and C. foetidissima; and Citrullus lanatus and C. colocynthis.  Systemic symptoms produced on these plants ranged from chlorotic or necrotic dots to severe vein yellowing and stunting.  Properties in crude sap were DEP = 10⁻²–10⁻³, TIP = 50–55°, and LIV = 48 hr.  Electron-microscopic studies of the virus showed rod-shaped particles 715 nm long.  This is the first report of CVYV in Jordan.

References: Cohen, S., and Nitzany, F. E. Phyopathol. Mediterr. 1:44, 1960.  Sela, I., et al.. Phytopathology 70:226, 1980.