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

Botrytis (grey rot).

PHOTO 74. For germinating botrytis spores, burst berries provide convenient ports of entry whereby berries may be penetrated.

PHOTO 75. Total browning and accompanying tissue degradation of berries are often encountered when warm, moist conditions occur after botrytis infection (in compact bunches especially).

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