ISHS Acta Horticulturae 368: International Symposium on Postharvest Treatment of Horticultural Crops
SCALD CONTROL ON APPLES WITHOUT USE OF CHEMICALS |
| Author: | K. Nardin |
| Abstract:
The objective of this investigation was to study alternative methods to the use of Diphenylamine (DPA) or Ethoxyquine (EQ) to control "superficial scald" on Red Deicious Granny Smith and Morgenduft apples grown in the South Tyrol region (Italy). From all the trials carried out at Laimburg Institute from the early 80s, the "hot-water" treatments showed a promising but insufficent reduction of scald on all varieties. On the contrary, CA storage regimes adopting "Ultra-Low Oxygen" content (0.9–1.1% O2), compared with the conventional one (2.5–3.0 % O2), controlled "superficial scald" on Red Delicious and Granny Smith for about 150 days (followed by 10 days at room temperature) and over 210 days for Morgenduft, also in those years when scald incidence was very high. South Tyrol grown apples, harvested at commercial maturity, can benefit from ULO storage for scald control, because they are tolerant to such atmospheres; in fact, none of the tested varieties accumulated, during or after the storage period, alcoholic flavor or showed visual external or internal symptoms of low-oxygen injury (Hypoxia or fermentation). | |
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