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

Sulphur burn (441); bunch stem necrosis (442).

PHOTO 441. A further example of sulphur burn (as in Photos 439 and 440) occurring widely on berries and even pedicels. Not to be confused with sunburn or even anthracnose.

PHOTO 442. A typical example of bunch stem necrosis in a bunch of table grapes, in which case the band formation occurs in positions where lateral branches develop out of the rachis – to be followed by browning and drying out, in conjunction with wilting, shrivelling and drying out of berries.

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