Cantidades adquiridas de cucumber vein yellowing virus en el vector bemisia tabaci y cargas virales en plantas huesped de pepino y zucchini ; Acquired amounts of cucumber vein yellowing virus in the vector bemisia tabaci and viral loads in cucumber and zucchini host plants

Cucumber vein yellowing virus (CVYV) is an economically-important pathogen of cucurbit crops in the southeast of Spain, and is transmitted in a semi-persistent manner by Bemisia tabaci. Since 1980, many new viruses infecting cucurbits around the world have been described; several have become widespread causing economic damage following multiplication and spread of the vectors that transmit them. The relationships between plant viruses, their vectors and host plants can be beneficial, neutral, or antagonistic, depending on the species involved. Consequently, these relationships may affect the processes of biological invasion and displacement of indigenous species by invaders when the invasive and indigenous organisms occur within overlapping niches. Several studies highlight the importance of amounts of acquired virus after acquisition to transmission efficiency. Recently we found that the amounts of CVYV detected in B. tabaci adults collected from field crops differed according to the source crop species [J. Virol. Methods, 146: 45-51 (2007)]. In the present study we evaluate the hypothesis that different crop species infected with CVYV accumulate different amounts of virus, and which correlate with those found in the vector after virus acquisition.