Skip to main content
Grapefruit

Grapefruit

Recommended

Conventional cooling

Dynamic Cooling

Pre-cooling

De-greening

Ripening

General Tips for Grapefruit

Storage temperatureRelative Humidity (RH)DurationPre-coolingSensitivity to ethyleneEthylene ProductionControlled Atmosphere
Storage temperature: 12 °C – 14 °C
Relative Humidity (RH): 90%-95%
Duration: 6 – 8 weeks
Pre-cooling: Not required
Sensitivity to ethylene: High
Ethylene Production: Very low
Controlled Atmosphere: Not recommended

Storage Temperature: Recommended range is 12 °C – 14 °C.

High Humidity: Select an air-cooler with a small air–product temperature differential (ΔT).

De-Greening: Apply de-greening only to the required fruit volume according to the chamber capacity.

Storage Duration: Recommended period is 6 – 8 weeks.

Controlled Atmosphere: Not recommended, as it is uneconomical for small production volumes and provides limited benefit in extending shelf life.

Ozone: Install an ozone generator delivering the necessary ozone concentration to control microbial load.

Ventilation: A dedicated, digitally controlled ventilation system should be installed for the removal of ethylene and carbon dioxide (CO₂) from the chamber atmosphere.

IMPORTANT TIPS
  • Low temperatures can cause peel damage and chilling injury.
  • Ethylene removal from cold-storage chambers improves preservation.
  • Maintaining medium CO₂ concentrations supports long-term storage.
  • Excessive CO₂ inside the chamber can lead to off-odours.
  • For de-greening, apply 1–10 ppm ethylene at 24 °C – 26 °C, 90 %–95 % RH, for a duration of 2–3 days.
  • Disinfect cold-storage chambers before use.
  • Disinfect and wax the fruit prior to storage.