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

Black foot.

PHOTO 135. Black foot rotting from the bark to the pith, which is obviously able to impact significantly on the blockage of vascular tissue.

PHOTO 136. Black foot vascular tissue discolouration is illustrated by a section through the foot of the grapevine.

A Guide to Grapevine Abnormalities in South Africa • 91