Comparison of effectiveness between bees-carnauba mixed wax and chitosan when combination with phenyllactic acid on postharvest qualities of Orange Fruit CV. Canh during low temperature storage

Comparison of effectiveness between bees-carnauba mixed wax (mw) and chitosan when combination with phenyl lactic acid (pla) on postharvest qualities of orange fruit cv. canh during low temperature storage was studied,by soaking fruit in 2.5% pla before coating with 8% mw and 2% chitosan solution,and then storing at 5 ± 1°c for 60 days. while,untreated fruits were used as control. percentage of weight loss and fruit decay,total sugar content,titratable acidity content,total soluble solids (tss) content,ascorbic acid content,and total microorganisms were monitored during the preservative time. the results showed that 2.5% pla in combination with 8% mw had a higher preservative effectiveness when compared to 2.5% pla in combination with 2% chitosan and control fruits,which was expressed as lower percentage of weight loss and fruit decay,and lower total microorganisms for 60 days in storage. moreover,fruits maintained nutrient ingredients expressed as total sugars,titratable acidity,tss and ascorbic acid content.