Effet of CATTS post-harvest treatment on 'Fuji' apple fruit qualities

As an alternative of methyl bromide fumigation, a relatively high temperature treatment has been developed to disinfect larval of the peach fruit moth, Carposina sasakii Matsuraura (Lepidoptera: Carposinidae). Under a controlled atmosphere (CA) using 15% CO2 and 1% O2, control efficacy of the temperature treatment is highly enhanced. The combined technique of the high temperature and CA is called eCATTSf. This study assessed eFujif fruit qualities after various CATTS treatments. The treated apples were stored at 25oC for 14 days or at 1 oC for 120 days. At different periods, the apples were analyzed in physical (firmness, soluble solid, acidity), chemical (CO2 and ethylene emission) and biological (putrefaction) characters. No significant changes in physical characters were detected among the apples treated with different CATTS in any storage conditions. Low temperature storage decreased respiration rate (CO2 emission) and increased ethylene evolution. Increase of CATTS treatment periods longer than 90 min significantly decelerated CO2 emission and decrease ethylene evolution even in 1oC storage. Degree of apple putrefaction was not changed at mild CATTS treatments shorter than 120 min for 30 days. These results indicate that CATTS treatment using 60 min exposure to disinfect C. sasakii larvae can be applicable to eFujif apples without any detrimental effects of fruit qualities.