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

Bacterial blight.

PHOTO 143. A young shoot is wiped out together with the inflorescence (during flowering) as in Photo 142. The dead and brittle shoot section was broken off at the top end of the peduncle.

PHOTO 144. Typical of bacterial blight is the development of small, lenticular cracks on young shoot sections, encircled by brownish-black tissue – as depicted here in the middle shoot. Not to be confused with dead-arm disease.

A Guide to Grapevine Abnormalities in South Africa • 97