New host plants of Cucumber vein yellowing virus
The natural host range of Cucumber vein yellowing virus (CVYV - EPPO Alert List) was previously thought to be restricted to Cucurbitaceae. However, in south-eastern Spain, studies have recently shown that other plants could be natural hosts of the virus. In spring 2001, leaf symptoms ranging from vein clearing to general leaf chlorosis were observed on weed species commonly growing within or near commercial glasshouses. Samples were collected from 6 weed species and tested for the presence of CVYV. The virus was detected in Ecballium elaterium (Cucurbitaceae), Convolvulus arvensis (Convolvulaceae), Malva parviflora (Malvaceae), Sonchus oleraceus, S. asper and S. tenerrimus (Asteraceae). In addition, whitefly transmission was used to confirm that S. oleraceus is a natural host of CVYV. Natural infection of these six common weed species consistently coincided with an outbreak of CYVY in cucurbitaceous crops and high infestations of Bemisia tabaci in the commercial glasshouses nearby.
Sources
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Janssen, D.; Ruiz, L.; Velasco, L.; Segundo, E.; Cuadrado, I.M. (2002) Non-cucurbitaceous weed species shown to be natural hosts of Cucumber vein yellowing virus in south eastern Spain.
New Disease Reports, volume 5, January 2002 – July 2002.
http://www.bspp.org.uk/ndr/july2002/2002-10.htm
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