After a hard winter the wine growers had hoped for a nice spring and early summer. But instead, diseases have spread in the vineyards. La Vigne informs about cool and rainy weather during flowering, which has caused the disease coulure in several places, for instance in the Côte d’Or in Burgundy, Alsace and Bordeaux.
Coulure gives an uneven flowering which may affect the harvest quantity. In Alsace, the grape affected is mainly muscat. In Bordeaux, the flowering was very slow and heterogeneous.
Unripe grapes. Suffering from coulure, poor fruit setting, copyright BKWine Photography
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[...] Coulure has been a problem in the French vineyards this year. But a bigger problem is probably the downy mildew. According to La Vigne, the mildew attacks started early this year in Burgundy, already at the beginning of the flowering. The reason is the wet spring in Burgundy. It rained 300 mm in April and May, which is a lot for only two months, and the rainy weather continued in June, so providing perfect conditions for downy mildew. Vine leaf showing attack by downy mildew, copyright BKWine Photography [...]