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

Hail damage (433); lightning (434).

PHOTO 433. An example where lignified shoots (even with cordon and trunk sections) were so damaged by severe hail storms that sections of bark were knocked right off. In some cases such canes may die, while callus formation may sometimes occur around the damaged tissue. Obviously ideal ports of ingress are created for secondary wood rotting organisms – an aspect that emphasises the importance of timeous and correct actions/follow-up procedures.

PHOTO 434. An illustration of lightning damage representative of a situation where trellis wires are directly hit, resulting in the browning and drying out of leaves and shoots across the entire row.

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