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

Oidium.

PHOTO 28. The visual appearance of lateral branches of the bunch framework as well as pedicels subjected to oidium infection.

PHOTO 29. Decreased susceptibility to oidium is experienced with progressive ripening.

26 • A Guide to Grapevine Abnormalities in South Africa