Grapevine flavescence doree and other yellows of grapes. Flavescenza dorata e altri giallumi della vite

After c. 15 years from its first appearance in Veneto, Italy, grapevine flavescence doree (phytoplasmas) now affects most of the viticultural area of that region. The features distinguishing flavescence doree from other yellows diseases are described. The incidence of flavescence doree in Vicenza is summarized from observations and experiments conducted in that province and from information in the literature, with particular reference to symptomatology, epidemiology and control. Control strategies are recommended. The importance of protecting healthy nursery plants from the vector, the cicadellid Scaphoideus titanus, by nets or repeated insecticide treatments is stressed.