Effect of latent GVB infection on agronomic and enological performances of wine cultivar Albarossa (Vitis vinifera L.)

Grapevine virus B (GVB), member of the genus Vitivirus, is closely associated with Corky bark disorder of the Rugose Wood complex. Although not particularly widespread in grape, it is generally considered harmful and the Italian regulations (DM 24/06/2008) listed the GVB among the viruses from which a selected clone must be free to be registered in the National Catalogue. Few, if none, information however were reported on the real impact of latent GVB infection in grapevine. The aim of this study was to ascertain agronomic and enological performances of symptomless vines affected by GVB in comparison with GVB-free plants.