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

Aster Yellows.

FOTO 273. Aborted young bunches are considered characteristic with Aster Yellows disease.

PHOTO 274. In addition to the situation in Photo 273, partial dieback of bigger bunches can result in seriously reduced productivity in affected grapevines.

176 • A Guide to Grapevine Abnormalities in South Africa