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

Leafroll.

PHOTO 190. Despite overall reinfection – which may be ascribed to secondary spread of leafroll – it is possible, in this example, to distinguish between various categories (visually lightly and heavily infected).

PHOTO 191. A characteristic example of primary spread of leafroll from surrounding or adjacent blocks. In this instance the young vineyard (below left) can be considered particularly exposed to reinfection – especially where mealybug and ants are present.

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