This study was carried out during two successive seasons (2016 and 2017) on six years old Keitt mango trees grafted on Succary seedlings as rootstocks and planted at 2×3 meters in sandy soil under drip irrigation system in Kafr El-Sohbi village, Qalubia Governorate, Egypt., To study the influence of kaolin and screen duo foliar application on fruit sunburn, yield and fruit quality. Hence, the foliar applications treatment were kaolin (aluminum silicate) at 25,50 and 75g/L and screen duo at 6,12 and 18 cm 3 /L sprayed once at mid of June and also sprayed twice at mid of both June and July during both seasons of study as well as, control (tap water spray). The influence was evaluated through the response of the different measurements as yield, sunburned fruit measurements, fruit quality and fruit skin color parameters with kaolin and screen duo concentrations and times of spray (once or twice). The obtained results revealed that the response to screen duo was more pronounced and differences between its three concentrations were significant in most cases as compared each other from one hand and the highest one (18 cm 3 /L.) was the most effective in most cases from the other hand. Referring the specific effect of times of spray (once or twice) data display obviously that the highest values in most cases were significantly in concomitant to fruits sprayed twice during both seasons of study. Anyhow, it could be concluded that, spraying screen duo at 12 and/or 18 cm 3 /L twice in summer months (at mid of both June and July) had a positive effect to prevent fruit sunburn damage and improved yield and fruit quality of Keitt mango fruits.

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 present study was carried out during two successive seasons (2016 and 2017) at El-Frafra Oasis District, Egypt. Female 'Sewi' date palms of healthy, nearly homogenous in growth, as well as fruiting ability, were selected. The selected palms were pruned after harvesting and leaf bunch ratio was adjusted to 8 leaves per bunch during both seasons of study. The effect number of bunch per palm (8, 10 or 12) and thinning % by cutting out a number of strands from the centre of the bunch enough to remove about (0, 10, 20 and 30%) and their combinations were investigated. Anyhow, the influence was evaluated through the response of the different (productivity, fruit physical and chemical properties) to the specific and interaction effects of both investigated factors. The obtained results revealed the greatest fruit weight per bunch was always in significant concomitant to 8 bunches per palm +zero thinning % during both seasons. Moreover, the highest fruit weight per palm was significantly coupled to 12 bunches/palm + zero thinning level. However, the highest values of fruit weight (g) and fruit dimensions were significantly induced by 8bunches/palm + 30 thinning %. Anyhow, the heaviest fruit pulp weight was significantly coupled with (8 bunches /palm +30% thinning) the highest fruit seed weight was exhibited significantly by (8bunches/palm +30% thinning level) and (10 bunches/palm +30% thinning level). Meanwhile, the

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This study was conducted during two successive seasons of 2016 and 2017 on Crimson seedless grapevines (Vitis vinifera L.) in a private vineyard located at El-Khatatba region, Minofia governorate, Egypt. The vines were 6 years old and spaced 2.0 m within vines and 3.0 m between rows and grown in a sandy soil under drip irrigation system. This investigation was conducted to study effect of potassium sulphate (60, 90, 120 and 150 kg/fed.) and foliar spray magnesium sulphate (0.0, 100, 200 and 300 ppm) as well as their combination in order to assure optimum growth and maximum productivity with high fruit quality.The obtained results showed that the largest leaf area and the thickest cane were resulted from the combinations of potassium at 150 kg/fed., especially those received magnesium at the high level (300 ppm) and medium level (200 ppm) in the two seasons. The highest values of berry length, width and weight were registered by the combined treatment between potassium fertilization at 150 kg/fed. and 300 ppm magnesium in the both seasons. The best cluster weight and yield/ fed. were scored by the combination of the high rate of both potassium and magnesium fertilizer in the two seasons. The combined treatment between potassium and magnesium at the high level achieved the highest values of red berries % and the lowest values of green berries % in the two seasons. Whereas, the highest record of pink and green berries % were gained by combined treatment received the lowest rate of potassium fertilizer and magnesium foliar spray at 0.0 ppm in the two seasons.The highest values of total sugars %, TSS % and anthocyanin content as well as the lowest value of acidity % were scored by the combined treatment between the high rate of potassium fertilization and magnesium foliar spray at 300 ppm in the two seasons. The highest leaf content of N, P and K % were obtained by those fertilized by the high rate of both potassium and magnesium in the two seasons. Thereby, it could be recommended that foliar application with magnesium at 300 ppm and potassium fertilization at 150 kg/fed. could be used to improve growth, yield and quality berries of Crimson seedless grapes.