Effect of Coating Treatments by Chitosan and Some Natural Oils as Normal and Nano Forms on Wonderful Cultivar Pomegranate Fruits under Cold Storage

This research was carried out on a Wonderful pomegranate cultivar fruits at the National Research Centre, Researches and Production Station, at El-Nobaria district, El-Behaira Governorate, Egypt. after harvest in the cold storage of Agriculture of Cairo University during two seasons (2020-2021 and 2021-2022). The treatments were arranged in a completely randomized design including seven coating treatments after harvest on Wonderful cultivar pomegranate fruits under storage refrigerated at 7°C and RH 90%, all treatments three replicates. This study aimed to obtain the effect of some natural and chemical materials on Wonderful pomegranate fruits during storage while increasing their nutritional and marketing value and the shelf life of fruits. Wonderful cultivar pomegranate fruits before storage treated by seven treatments as follows: Chitosan 2g/L, Nano Chitosan 1g/L, Clove oil 2%, Nano Clove oil 1%, Rosemary oil 1%, Nano Rosemary oil 0.5%and control. The transactions were carried out within six weeks by adding these materials to pomegranate fruits by coating after harvest. The results proved that Nano Rosemary 0.5% exhibited significantly the highest values in all chemical and physical characteristics of fruits compared to the control treatment and the other treatments.