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

Bacterial blight.

PHOTO 149. The destruction of a young bunch (during flowering) by bacterial blight (left) compared to an example that is intact (right).

PHOTO 150. An example of a young bunch (after set) which is beginning to succumb to the onslaught of bacterial blight. Note the typical necrotic cracks on the rachis. Not to be confused with dead-arm disease.

100 • A Guide to Grapevine Abnormalities in South Africa