Vol. 70 No: 4

Title:
The Effects of Storage Atmosphere on the Keeping Quality of ‘Idared’ Apples

Author:
J. STOW

pp: 587-596

Abstract:
The response of ‘Idared’ apples to storage in atmospheres containing less carbon dioxide than the recommended 8% was investigated after it was found that core flush could develop in 8% CO₂ + 13% O₂ at 3.5°C. Storage in <1% CO₂ and 1 or 2% O₂ resulted in less core flush than storage in 5% CO₂ + 3% O₂, but apples from 2% O₂ were softer, as determined by both a sensory panel and a penetrometer, than those from 5% CO₂ + 3% O₂. Jonathan spot developed in both low oxygen regimes. A pre-harvest application of daminozide increased the surface area coloured red, increased firmness at harvest and reduced the incidence of core flush in samples stored in 8% CO₂ + 13% O₂. It was concluded that to minimize losses from physiological disorders, ‘Idared’ grown in UK should be picked no later than the beginning of November and stored in <1% CO₂ +1% O₂ for no more than three months.

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