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

Phytophthora.

PHOTO 114. Wilting and yellowing of leaves on nursery vines as a result of Phytophthora (as in Photo 113).

PHOTO 115. Leaf colour (Photos 113 & 114) rapidly changes to yellow and eventually to brown.

78 • A Guide to Grapevine Abnormalities in South Africa