Interest in edible coatings applications has progressively developed towards improving the quality and shelf life of climacteric fruits. This study aimed to investigate the influence of pre-harvest treatments (chitosan, chitosan nanoparticle, and CaCl₂) on the physicochemical and quality attributes of Barhi date palm fruits during storage periods. Different pre-harvest treatments (control, chitosan 1, 2, and 3 g/L, CaCl₂ 1, 2, and 3 g/L, nano-chitosan 1, 2, and 3 cm³ /L) were applied. The results showed that all treatments were effective for enhancing the fruit quality, with increasing total soluble solids and total sugars, decreasing weight loss, discarded total acidity, and total soluble tannins compared to the control treatment. Additionally, the results revealed that the highest percentage of TSS was obtained in control fruits (35.78%). Meanwhile, the lowest mean values were obtained from chitosan nanoparticle at 3 cm³/L (33.91%). Treatments with chitosan nanoparticle at 3 cm³/L and CaCl₂ at 3 g/L gave the statistically highest values of total tannins (0.225 and 0.220, respectively). The optimal treatment involved spraying the fruit with 3 cm³/L of nano-chitosan or 3 g/L of CaCl₂ to increase the fruit quality and the shelf life of Barhi dates. The results indicated that weight loss was negatively linked with the moisture content and firmness, while decay had a strong positive relationship with the Rutab index and a negative correlation with the moisture content. Furthermore, the Rutab index was negatively associated with the total tannins and total chlorophyll.

The experiment was conducted to investigate the effects of foliar application of gibberellic acid on productivity and fruit quality in ‘Barhee’ date palm was carried out during the 2023 and 2024 seasons in at El-Mansoria district (Egypt - Alexandria Desert Road), El-Giza Governorate, Egypt. GA3 (5, 10, 15, 20, 25 ppm) was applied to the Date palms and Fruit under control were sprayed with tap water only. Investigate were recorded on fruit properties (productivity and some fruit physical properties) like Fruit retention (%), Bunch weight (kg), Yield/palm (kg), Fruit weight (kg); Seed (%) and Flesh (%), Fruit length (cm), Fruit diameter (cm), Fruit shape index, Firmness (g/cm2), Moisture (%), Marketable fruits, Unmarketable fruits. Results indicated that GA3 (10 ppm) spray favorably influenced productivity and fruit quality of ‘Barhee’ date palm over control during both seasons. Similarly, the fruit set was increased. Although individual fruit weight was reduced slightly, while fruit number as well as marketable yield was increased tremendously over control with no adverse effect on fruit quality characteristics. In all, spraying GA3 during both seasons was much more effective in achieving the desirable results.

Experiment were conducted to investigate the effects of foliar application of gibberellic acid on fruit chemical characters in ‘Barhee’ date palm carried out during the 2023 and 2024 seasons in at El-Mansoria district (Egypt - Alexandria Desert Road), El-Giza Governorate, Egypt. GA3 (5, 10, 15, 20, 25 ppm) was applied to the Date palms during both seasons. Fruit under control were sprayed with tap water only. Investigate were recorded on fruit chemical characters like TSS (%), Titratable acidity (%), TSS/acid ratio, Total sugars, Reducing sugars, Non-reducing sugars, Tannins (%), Phenols (mg g-1 Fw), Total chlorophyll (mg/100 g Fw), Total Carotenoids (mg/100g Fw) and Rutab (%). Results indicated that GA3 concentrations spray either during 2023 and 2024 seasons. Favorably influenced all fruit chemical characters of ‘Barhee’ date palm over control. In all, to investigate the effects of foliar application spraying GA3 during both seasons was very much more effective in achieving the desirable results.