The most stringent of all is the import ban of the host plants of these pests, However ,when exporting country has developed complete disinfestations method against these pests, importation is globally accepted on the condition that exporting country undertakes pre-export treatment procedures specifically agreed by the importing country. In recent years, either vapor heat or cold temperature is mainly used for the sterilization of fruit flies. For both methods, the standard treatment procedure which is suitable for each particular species of fresh fruit is selected for use.