Disease Note.

First Report of Zucchini Yellow Mosaic Virus in Cucumis melo in Colima, Mexico. M. Orozco-Santos, IN1FAP-CIPAC, Campo Experimental Tecoman, Programa de Fitopatologia, Tecoman, Col., 28100, Mexico. O. Perez-Zamora, and O. Lopez-Arriaga, IN1FAP-CIPAC, Campo Experimental Tecoman, Programa de Fitopatologia, Tecoman, Col., 28100, Mexico. Plant Dis. 78:1123. Accepted for publication 19 July 1994. Copyright 1994 The American Phytopathological Society. DOI: 10.1094/PD-78-1123B.

Zucchini Yellow Mosaic Virus (ZYMV) infection causes heavy losses in cucurbit crops grown in the Mediterranean, central Europe, and the United States. Cantaloupe (Cucumis melo L.) that were stunted, with severe fruit malformation and distortion of leaves with yellow mosaic, vein clearing, and enation were found in the Tecoman Valley of the state of Colima, Mexico, from January to May 1993. In indirect ELISA, affected cantaloupe plants were positive for papaya ringspot virus-W (PRSV-W), watermelon mosaic virus (WMV-2), cucumber mosaic virus (CMV), and ZYMV. The ZYMV incidence was 10-15% in 10 commercial fields of cantaloupe. Affected plants were sap-inoculated to two indicator host. plants for ZYMV (1). A ZYMV-positive sample was indicated by latent systemic infection in Ranunculus sardous Crantz and absence of infection in Nicotiana glutinosa L. ZYMV was transmitted with Myzus persicae (Sulzer) from R. sardous to cantaloupe cv. Hiline and zucchini squash (Cucurbita pepo L. cv. Zucchini Grey) and then maintained in this cucurbit. M. persicae, Aphis gossypii Glover, A. spiraccola Patch, and Uroleucon ambrosiae Thomas transmitted ZYMV from Cucurbita pepo to Cucumis melo; but Aphis nerii Boyer de Fonsc. did not. From 400 seeds harvested from ZYMV-infected cantaloupe, no virus-infected seedlings were obtained. Symptomatology, systemic latent infection in R, sardous, absence of infection in N. glutinosa, serology, and aphid transmission data indicate that ZYMV is present in Colima, Mexico, and poses a potentially. serious threat to cucurbit production in this area