Noble Rot on 2006 Riesling grapes - click to close

2006 Riesling grapes showing Botrytis 'noble rot'

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The Botrytis fungus attacks the grape berries, encouraged by humidity. If the grapes are ripe and healthy, and the ambient conditions are alternately damp (not rainy) and sunny as on Autumn mornings, this 'Noble Rot' shrivels the grapes and concentrates the natural sugar enabling top quality sweeter wines to be produced.