Abstract

Grapevines of the Maltese islands were surveyed for the presence of virus diseases. Symptoms of fanleaf degeneration, leafroll, rugose wood and fleck were observed in the main grape‐growing areas. The occurrence of these diseases was experimentally confirmed by graft transmission to woody indicators, which also revealed the presence of vein necrosis, a latent virus‐like disorder. Viruses identified were grapevine fanleaf nepovirus, grapevine fleck virus, grapevine A closterovirus, grapevine leafroll‐associated closteroviruses I and III. ELISA tests showed that 86% of 322 vines individually checked were infected by one or more viruses.

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