Tolerance of `Fuyu' persimmons to low oxygen and high carbon dioxide atmospheres for insect disinfestation
Elizabeth J. Mitcham, Mohamed M. Attia and William Biasi
Postharvest Biology and Technology Vol: 10 Issue: 2 Pages: 155-160.
1997
บทคัดย่อ
The tolerance of `Fuyu' persimmons (Diospyros kaki L.) to insecticidal controlled atmosphere (ICA) was investigated. Freshly harvested `Fuyu' persimmon fruit were exposed to air, 0.25% O2, 40% CO2 in air, and 0.25% O2 + 40% CO2 at 20°C for 3, 5 and 7 days. Fruit treated with ICA exhibited slight external injury and fruit treated with 40% CO2, regardless of the O2 concentration, were softer than fruit treated with air or 0.25% O2 only 5 days after removal from the treatment. Ethanol and acetaldehyde concentrations were higher in treated fruit compared with air controls upon removal from ICA, with the highest levels in persimmons exposed to 0.25% O2 + 40% CO2. Treatment with 40% CO2 (balance air) resulted in higher levels of ethanol and acetaldehyde in the fruit than treatment with 0.25% O2 (0.03% CO2). Ethanol and acetaldehyde concentrations decreased 30 and 20%, respectively, after 5 days storage in air at 10°C following ICA. Informal sensory evaluations indicated no loss in quality as a result of the ICA treatments. Tolerance of `Fuyu' persimmons to ICA indicates a potential for developing such treatments for insect quarantine.