EFFECT OF FOLIAR SPRAYING WITH SOME ANTI-TRANSPIRANTS ON YIELD AND QUALITY OF FRUITS OF "EWAISE" MANGO TREES UNDER ASWAN CONDITIONS

This investigation was carried out for determining the influence of some anti-transpirants, namely salicylic acid 100 ppm, chitosan 0.1 %, and green miracle 3cm3/l as well as their combinations on yield and its attributes of "Ewaise" mango trees grown in Aswan Governorate, southern Egypt. The experiment conducted during the two seasons of 2021/2022 and 2022/2023 on 20 years old orchard planted at a spacing of 7x7 m in sandy soil. The trees were sprayed four times for both seasons, on the 1st week of November, the 1st week of December, after the fruit set, and one month later. It is clear from the obtained results that spraying "Ewaise" mango trees with the different anti-transpirants used was significantly improved fruit length, diameter and volume, fruit weight, and fruit yield/tree. In addition, it resulted in reducing peel, seed percentages and improving pulp percentage. The different fruit quality including TSS %, reducing, non-reducing and total sugars, vitamin C content, and carotene were improved, while the total acidity were reduced as compared to the control treatment. The higher improvement in the different yield and fruit traits was significantly coincide with applying salicylic acid 100 ppm + chitosan 0.1% + green miracle 3cm3/l, followed by chitosan 0.1% + green miracle 3cm3/l, and then salicylic acid 100 ppm + green miracle 3cm3/l. From this study, it can be recommended that applying the mixture of salicylic acid 100 ppm + chitosan 0.1% + green miracle 3cm3/l with four spray had statistically the maximum productivity and quality measurements.