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Safj Sa Fruit Journal Phi Superficial Scal Featured
October / November 2023

Forewarned is forearmed

SA Fruit Journal: October / November 2023

In the world of export-grade 'Granny Smith' apples, superficial scald is hardly a small matter. By Charmain Lines

Superficial scald may not sound like a big problem, but when it comes to export-grade 'Granny Smith' apples, it can be a deal breaker. Therefore, the means to determine the risk of this disorder before it develops will serve the industry well.

A major postharvest oxidative stress disorder, superficial scald limits the long-term storage of 'Granny Smith' apples. It is known that the disorder starts with an induction period that occurs during storage, followed by symptom expression in the form of superficial browning of the peel after storage and ripening. Producers and exporters of 'Granny Smith' apples also know that superficial scald knocks down the fresh-market value of the fruit and contributes to significant annual losses.

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