Downy Mildew

Grape Downy Mildew Symptoms
A gallery of slides
At the third International Workshop on Grapevine Downy and Powdery Mildew (Loxton, South Australia, 21-28 March 1998), it was decided to create a site where people could view the variety of symptoms produced by Plasmopara viticola on different cultivars. Click on the cultivars below to see more pictures of downy mildew on that specific cultivar.

Cultivar Unknown	Trollinger (Syn.: Vernatsch)	Riesling
Mueller-Thurgau (Syn.: Rivaner)	Pinot noir (Syn.: Spaetburgunder)	Silvaner
Pinot blanc (Syn.: Weisser Burgunder)	Pinot gris (Syn.: Ruhlaender)	Sangiovese

Please send us any pictures you might have so our collection will be more complete.

J. W. Pscheidt¹ and W. Mahaffee²
¹Dept. of Botany & Plant Pathology, Oregon State University, Corvallis, OR, USA, 97331-2903.
² USDA-ARS-HCRL, 3420 NW Orchard Ave, Corvallis, OR, USA, 97331.