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

Stem grooving (213); rugose wood complex (214).

PHOTO 213. Intense grooving and pitting on the scion trunk component, not to be confused with Shiraz decline.

PHOTO 214. Anatomical reactions/changes are induced by the rugose wood complex in trunks older than a year.

140 • A Guide to Grapevine Abnormalities in South Africa