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

Leafroll.

PHOTO 188. The incidence of leafroll in one (or more) young grapevines is widespread in a newly established block. Such instances are indicative of the phytosanitary quality of plant material – a situation that demands immediate action(s).

PHOTO 189. A typical example of secondary spread of leafroll – from grapevine to grapevine in specific rows, as well as crossing over to adjacent rows.

126 • A Guide to Grapevine Abnormalities in South Africa