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

Choking/strangulation.

PHOTO 503. Although this example illustrates severe choking/strangulation effects, as a result of tying the rope below instead of above the bud for intended trunk/grapevine development, active scion root development/growth (graft union, as well as choking position covered with soil) may be considered an additional cause of the deteriorating appearance and dieback of this grapevine.

PHOTO 504. Similar to the cause illustrated in Photo 503, severe choking/strangulation is encountered in this Weisser Riesling grapevine. Such situations are reflected where growth and performance are normal in affected grapevines for a certain period, only to be subjected to sudden drying out, especially as a result of stress.

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