Resumo

FELIX-GASTELUM, Rubén et al. Detection of Zucchini yellows mosaic virus (ZYMV) and its coinfection with other virus in cultivated Cucurbitaceae and wild plants in Fuerte Valley, Sinaloa, Mexico. Rev. mex. fitopatol [online]. 2007, vol.25, n.2, pp.95-101. ISSN 2007-8080.

Viral diseases are the main limiting factor for cucurbit production in El Fuerte Valley, Sinaloa, Mexico. The objective of this study was to detect Zucchini yellows mosaic virus (ZYWV), Watermelon mosaic virus (WMV), Papaya ring spot virus (PRSV-W), and Cucumber mosaic virus (CMV) using ELISA and RT-PCR procedures. ZYMV and the mixture ZYMV + PRSV-W predominated during the month of November with 54.5 and 36.4% incidence, respectively. In December, infections by ZYMV and PRSV-W occurred at 8.3 and 75%, while ZYMV + PRSV-W was detected at 16.7%. In January, infections by ZYMV, PRSV-W, CMV, and WMV ranged from 3.8 to 23.1%; and the combinations of these viruses varied from 3.8 to 30.8%. In February, ZYMV and WMV occurred at 28.6%, while CMV occurred at 7.6%; combinations of these viruses ranged from 5.6 to 8.7%. In April, WMV and ZYMV reached 38.9 and 44.4%, respectively; the mixtures ZYMV + PRSV-W and ZYMV + WMV ocurred at 5.5 and 11.1%. All these viruses were detected in wild plants of tobacco (Nicotiana glauca), wild melon (Cucurbita foetedissima), bitter cucumber (Momordica charantia), and spiny cucumber (Cucumis dipsaceus), except ZYMV, which was not detected in wild tobacco. This study indicates the role of the wild plant species in the epidemiology these viruses merits further research in the region.

Palavras-chave : Viral diseases; tabacco; Nicotiana glauca; Cucurbita foetedissima; Momordica charantia; Cucumis dipsaseus.

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