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

Shiraz decline.

PHOTO 245. A characteristic example of the occurrence of deep cracks/grooves on trunk and cordon sections – which goes hand in hand with a hardening/necrosis of affected wood parts in grapevines associated with Shiraz decline.

PHOTO 246. Typical leaf discolouration patterns as associated with Shiraz decline. Also note the thickened graft union and trunk section in this example.

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