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

Shiraz disease.

PHOTO 238. Reactions/changes to the secondary xylem caused by Shiraz disease. The incidence of atypical wood vessels is characteristic (April 2005).

PHOTO 239. Typical of Shiraz disease is an intensely waved cambium (spoke wheel effect) combined with atypical, compressed wood vessels.

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