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

Shiraz disease.

PHOTO 232. Typical leaf discolouration patterns associated with Shiraz disease.

PHOTO 233. Leaf drop in normal instances has already been completed, while the process is considerably delayed in grapevines that show visual signs of Shiraz disease (mid-July 2005). Note the smaller appearance of grapevines (in the centre of the group especially) – likewise illustrated in Photo 225.

152 • A Guide to Grapevine Abnormalities in South Africa