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

Wind damage.

PHOTO 393. An example of a trellis system that succumbed to the onslaught of gusts of wind. Apart from the cement poles, grapevines are destroyed mostly as a result of the trunks being torn off/broken.

PHOTO 394. A typical example of shoots chafing against foliage wires, in which case vascular tissue is damaged to the extent that it is unable to engage in optimal translocation processes – a phenomenon that may even occur with more moderate prevailing winds.

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