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

Crown gall-like swellings.

PHOTO 159. In this specific instance the swelling of the graft union (see Photo 158) continued on the trunk – which appears abnormally thickened. Note the swelling (atypical in respect of crown gall) just below the point where the trunk had been sawn off in the 11:00-position.

PHOTO 160. The occurrence of strange swellings (Photo 159), which develop mainly on one side of the trunk section (positioned across for the photo).

A Guide to Grapevine Abnormalities in South Africa • 107