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A wine fermentation that stops before all the sugar is used is described as

  • A.Malolactic, and it softens the acidity of the wine
  • B.Aerobic, and it raises the alcohol content further
  • C.Stuck, and it leaves the wine vulnerable to spoilage
  • D.Complete, and it gives the most stable possible wine

Answer: C

A stuck fermentation leaves residual sugar together with a relatively low alcohol content, which is exactly the condition in which spoilage organisms thrive. Causes include excessive temperature, nutrient shortage and very high initial sugar.

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