First report of grapvine pinot gris virus in Emilia-Romagna and Veneto regions

A recently discovered trichovirus, grapevine pinot gris virus (GPGV), was suggested to be associated with a new grapevine disease in Trentino. the main symptoms are represented by leaf deformation with chlorotic mottling and various mosaic pattern. Shoots are also malformed, showing short internodes and abnormal branching. Diseased vines show a stunting, low vigour, reduced yields and low quality of the berries. Similar symptoms have been observed in some viticultural areas of Emilia-Romagna and Veneto. RT-PCR analysis were carried out to check the virological status of both symptomatic and symptomless grapevines. Results have revealed the presence of GPGV in all symptomatic vines but also in some apparently symptomless samples. PCR products were sequenced and all sequences showed a high identity with the published sequence of GPGV. Further investigations are in progress to better define the distribution and aetiology of this grapevine disease in the Emilia-Romagna and Veneto vineyards.