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

Crown gall-like swellings.

PHOTO 163. The drying out and dieback of young shoots associated with bud burst in the swellings (Photos 160, 161 & 162) is clearly illustrated. After bud burst these are also subject to dieback.

PHOTO 164. An enlarged version of an individual swelling is indicative of the occurrence of numerous apparently swollen buds. Note the intensely cracked and coarse bark sections. Such swellings or gall- like structures are atypical with regard to crown gall and should not be confused with the disease.

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