A Guide to Grapevine Abnormalities in South Africa - P.G. GOUSSARD

Enation.

PHOTO 256. A typical example of delayed bud burst and shoot growth, allied with seriously thickened and misshapen basal leaves, as associated with enation – compounded by the possibility of confusion in respect of herbicide damage. The example is representative of a winegrape vine (cultivar unknown) at the end of November 1977 in the Rawsonville area.

PHOTO 257. Shoots of enation infected grapevines have a tendency to grow downwards, but are not rubbery as with corky bark disease. The photo is representative of Sauvignon blanc grapevines in the Languedoc-Roussillon region in the south of France.

166 • A Guide to Grapevine Abnormalities in South Africa