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

Eutypa dieback (tandpyn).

PHOTO 110. A cross section of an Eutypa-infected cordon/arm shows a characteristic rotting pattern associated with the V-shaped appearance of necrotic wood, from the bark to the core wood. One clearly notes the boundary where the wood appears to be healthy.

PHOTO 111. An Eutypa-like appearance (small, necrotic leaves) when observed for the first time can easily be confused with other causes. Also note the yellow spots on basal leaves – in this instance these were not by any means related to downy mildew.

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