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

Leafhoppers.

PHOTO 354. The feeding activities of leafhoppers are based on the extraction of plant sap from the vascular bundles on the underside of leaves.

PHOTO 355. A typical example of browning and desiccation from the outer leaf edges, as associated with the feeding of leafhoppers. Not to be confused with salination, drought or drowning, inter alia.

228 • A Guide to Grapevine Abnormalities in South Africa