Details on the situation of bois noir phytoplasma in Switzerland
In Switzerland, the presence of phytoplasma causing bois noir on grapevine (stolbur phytoplasma) has recently been confirmed by PCR in several cantons. Bois noir was confirmed in Valais (on cvs. Chardonnay, Pinot Noir), in Vaud (cvs. Gamaret, Diolinoir, Doral), and in Genève (cv. Chardonnay). In Ticino, all grapevine-producing areas are affected by bois noir. Bois noir does not cause serious epidemics, although it can cause some local problems (especially at the edges of vineyards). However, its possible confusion with grapevine flavescence dorée (EPPO A2 quarantine pest) which has never been found in Switzerland, justifies the continuation of careful monitoring of Swiss vineyards for the presence of phytoplasma diseases.
Sources
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Gugerli, P.; Cazelles, O.; Genini, M.; Emery, S.; Colombi, L. (2002) Maladie du bois noir de la vigne en Suisse romande et au Tessin.
Revue suisse de viticulture, arboriculture, horticulture, 34(1), 15-17.
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