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

Crown gall-like swellings.

PHOTO 161. Swellings as in Photo 160. Note the coarse, loose and cracked bark sections.

PHOTO 162. The occurrence of swellings (Photos 160 & 161) on one- and two-year-old and older cane parts. Note: (i) the abnormally small pith sections; (ii) the loose and cracked parts of the bark; (iii) the occurrence of numerous swollen buds and (iv) the wilting of green shoots preceding their drying out.

108 • A Guide to Grapevine Abnormalities in South Africa