Grapevine flavescence dorée MLO not present in Switzerland
For several years symptoms of a yellows disease of grapevine have been observed on vines in Switzerland. An investigation was initiated to determine if the yellows disease is identical with grapevine flavescence dorée MLO (EPPO A2 quarantine pest). Diseased grapevine samples were collected in West Switzerland and in the Tessin and were subjected to an ELISA test specific to grapevine flavescence dorée MLO. All samples reacted negatively with the ELISA. The authors, therefore, concluded that grapevine flavescence dorée MLO is not present in Switzerland. They stressed, however, the danger presented by unknown yellows diseases.
Sources
Cazelles, O.; Kuszala, C. (1993) Prospection des jaunisses de la vigne en Suisse romande et au Tessin et comparaison avec la flavescence dorée par le test ELISA.
Revue Suisse de Viticulture, Arboriculture, Horticulture 25, 257-259.