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

Leafroll.

PHOTO 192. An example where leafroll has obtained a sure footing in the middle blocks. Primary spread to adjacent blocks is practically certain – especially where applicable vectors occur and drastic intervention does not take place.

PHOTO 193. Intense leafroll infection causes these high lying blocks to look almost like raisin drying surfaces. In the foreground infected Sauvignon blanc grapevines are clearly suffering.

128 • A Guide to Grapevine Abnormalities in South Africa