Also known as "grapevine flavescence dorée phytoplasma", this relatively new grapevine disease was probably introduced into Europe in the 1940s from the Great Lakes region of eastern North America. It first appeared here on a massive scale in France-Armagnac in the early 1950s and then spread epidemically across southern France, Italy and Spain. Corsica was hit particularly hard because grape varieties that are especially susceptible to it are cultivated here. It seems to occur preferentially in warmer regions, and the strong spread is possibly also due to climate change. There have also been individual observations with similar symptoms in Germany.
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Weinberater, Weinblogger und Journalist; Schwendi