บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Effect of short-term exposure to CO2-enriched atmospheres on ‘Valencia’ oranges quality.

Alonso M., Jacas J.A., Palou L., del Rio M.A.

5th International Postharvest Symposium . Volume of Abstract . Verona, Italy 6-11 June 2004, p.49

2004

บทคัดย่อ

Effect of short-term exposure to CO2-enriched atmospheres on ‘Valencia’ oranges quality.   Quarantine treatments must be currently applied to Spanish citrus export shipments to markets such as the US because of the endemic presence in the Mediterranean area of the Mediterranean fruit fly Ceratitis capitata (Diptera: Tephritidae).The current accepted quarantine treatment is fruit exposure to temperatures ranging from 1.1 to 2.2 °C.Alternatives are needed because fruit quality of some cold sensitive cultivars can be adversely affected by this treatment.

Since CO2 has shown proved insecticidal activity, short-term exposure to this gas appears as an interesting alternative.In the present work, ‘Valencia’ oranges quality was assessed o­n fruit exposed to 98% CO2 at 22 °C for 8, 16, and 24 h, stored at 5 °C for 7, 14, and 21 days, and then kept at 20 °C for 7 days to simulate shelf life.The following quality and sensory attributes were analyzed o­n treated and control fruit: rind colour and firmness, maturity index, juice yield, the fermentative volatile compounds ethanol and acetaldehyde, taste, and chewiness.

No general negative effects were observed in CO2-exposed fruit.Ethanol content was significantly higher o­n fruit exposed to the gas for 24 h and stored at 5 °C for 21 days than o­n control fruit.However, ethanol content o­n treated fruit did not reach 200 mg per 100 ml of juice.As a conclusion, exposure to CO2-enriched atmospheres shows promise for the control of C. capitata o­n citrus cold-sensitive cultivars.