Potential non-chemical methods for use against thrips in green asparagus: quality changes in response to heat treatments and high concentrations of carbon dioxide
Simantara P.
5th International Postharvest Symposium . Volume of Abstract . Verona, Italy 6-11 June 2004, p.114
2004
บทคัดย่อ
Potential non-chemical methods for use against thrips in green asparagus: quality changes in response to heat treatments and high concentrations of carbon dioxide
Quality changes induced in fresh green asparagus were determined after exposure to a combined post-harvest heat treatment followed by high CO
2 atmospheres at low temperature. Asparagus samples obtained from
Thailand were subjected to three heat treatments: control, hot water (45°C for 15 min) and hot air (45°C for 15 min). After that, they were transferred to sealed glass jars with atmospheres of low (1%) and high (52-83%) CO
2 concentrations at 4°C and 0°C for 24 h, followed by 10 days storage at the same temperature under air.
Quality tests were performed, 1) before heat treatment, 2) after heat treatment, 3) after CO2 treatment, 4) after 5 days storage and 5) after 10 days storage to evaluate weight loss, colour, overall appearance, decay, off-odour and texture. There were significant effects of hot air on weight loss, overall appearance, decay and texture, and significant, but much lower effects of hot water treatment. High CO2 atmospheres of 52-83% did not reduce observed quality of asparagus at all. No difference was seen between the two storage temperatures.