Grapefruit
Recommended
Conventional cooling
Dynamic Cooling
Pre-cooling
De-greening
Ripening
General Tips for Grapefruit
| Storage temperature | Relative Humidity (RH) | Duration | Pre-cooling | Sensitivity to ethylene | Ethylene Production | Controlled 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.