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Raisin de table Redglobe : les atmosphères à forte teneur en carbone de dioxyde appliquées lors de l'entreposage réduisent les pertes dues au Botrytis mais aggravent le brunissement du rachis.

Carbon dioxide-enriched atmospheres during cold storage limit losses from Botrytis but accelerate rachis browning of Redglobe table grapes.

Auteurs : CRISOSTO C. H., GARNER D., CRISOSTO G.

Type d'article : Article

Résumé

The authors evaluated a range of CO2 and O2 concentrations as a potential substitute to SO2 treatments for controlling decay development on Redglobe table grape during storage. In 1998, early and late harvested Redglobe grapes were stored in 16 controlled atmospheres of 5, 10, 15, 20, and 25 kPa CO2 combined with 3, 6, and 12 kPa O2. In 1999, 10 or 15 kPa CO2 combined with 3, 6, and 12 kPa O2 were tested in comparison with air-stored grapes as control. In 2000, late harvested `Redglobe' grapes were kept in 12 kPa CO2+6 kPa O2 in comparison with standard commercial storage practices of SO2 fumigation. None of the atmospheres tested for up to 12 weeks at 0 °C influenced SSC, titratable acidity (TA), SSC:TA, or berry shatter and browning. Rachis browning was accelerated and off-flavor was detected in grapes exposed to CO2 levels above 10 and 15 kPa for early and late harvested fruit, respectively. Atmospheres including above 10 kPa CO2 controlled decay incidence and spread among berries (nesting) independent of O2 concentrations during storage at 1 °C for up to 8 weeks and after 3 days at 20 °C, simulating retail display. Based on these data, combined 10 kPa CO2 and 3, 6 or 12 kPa O2 is suggested for up to 12 weeks storage for late harvested `Redglobe' grapes. An atmosphere of 10 kPa CO2+6 kPa O2 is suggested for early harvested Redglobe grapes, but should not exceed 4 weeks.

Détails

  • Titre original : Carbon dioxide-enriched atmospheres during cold storage limit losses from Botrytis but accelerate rachis browning of Redglobe table grapes.
  • Identifiant de la fiche : 2003-2383
  • Langues : Anglais
  • Source : Postharvest Biol. Technol. - vol. 26 - n. 2
  • Date d'édition : 09/2002

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