Abstract

VELASQUEZ-VALLE, Rodolfo  and  REVELES-HERNANDEZ, Manuel. Iris yellow spot virus detection in the onion cultivation of Zacatecas, Mexico. Rev. Mex. Cienc. Agríc [online]. 2011, vol.2, n.6, pp.971-978. ISSN 2007-0934.

The yellow spot virus Iris (IYSV) is the most important viral disease for garlic and onion crops in Zacatecas, Mexico. In late May 2010, yellow lesions were found in diamond-shaped leaves and flower stem of onion plants in commercial fields located in the municipalities of Loreto, Villa de Cos, Sain Alto, Villanueva, Calera de V. R. and Enrique Estrada from the State of Zacatecas. The DAS-ELISA test was positive for the virus in samples from different municipalities. Thrips tabaci the only known vector of IYSV was found in sampled commercial parcels, although, the presence of Frankliniella occidentalis was also recognized in a commercial plot of onions, whose samples were positive for IYSV too. No difference was found between height, leaf number, bulb weight or diameter of the plants without lesions and those with different numbers of IYSV lesions.

Keywords : Allium cepa L.; incidence; severity; tospoviruses.

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