Downy mildew

Scientific term: Plasmopara viticola, Peronospora

Genus/ Division: Mock mushroom, egg mushroom (Oomycota)

Features

Slightly purple or white-gray mealy coatings form on the underside of the leaf. Either oil spots or red colored areas (see picture) are visible on the upper side of the leaf.

Consequences

The consequence of the infestation is withering and dying of the leaves and eventually the whole vine. The grapes are then also no longer suitable for consumption.

Spread

The wind carries the spores and spreads the disease.

Treatment advices

Coming soon

Sources

  • Viret, Olivier, Werner, Siegfried, Pierre-Henri, Dubuis, and Katia, Gindro. "Echter Mehltau".Eidg. Departement für Wirtschaft, Bildung und Forschung WBF, Agroscope, AMTRA, Version von (2014).