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

Esca complex.

PHOTO 125. A characteristic of the esca complex is the occurrence of black specks (measles) on developing berries.

PHOTO 126. Berries (Photo 125) on such bunches shrivel and eventually dry out, assuming a raisin-like appearance. Also note the leaf characteristics typical of esca in the case of white grape cultivars.

86 • A Guide to Grapevine Abnormalities in South Africa