Document Type : Original papers
Authors
1
Assistant researcher, Horticulture Research Institute, Agricultural Research Center
2
Department of Horticulture (Pomology), Faculty of Agriculture and Natural Resources, Aswan University
3
Professor of Pomology, Faculty of Agriculture, South Valley University, Qena
4
First Researcher Horticultural Research Institute Agricultural Research Center
Abstract
The present investigation was conducted for evaluating the impact of some anti-transpirants, namely salicylic acid 100 ppm, chitosan 0.1 %, and green miracle 3cm3/l as well as their combinations on the blooming characteristics, growthaspects, pigment contents, and mineralcomposition of "Ewaise" mango trees grown in Aswan Governorate. The experiment conducted during the two seasons of 2021/2022 and 2022/2023 on 20 years old orchard planted 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 the different bloomingcharacteristics i.e. panicle length, total number of panicles/tree, number of secondary branches/ panicle, perfect flowers %, fruitset %, and fruitretention% compared to untreated plants. In addition, it resulted in improving growth aspects including shoot length,shoot diameter,leaves number/shoot, and leaf area compared to the control in the studied seasons. The different chemical composition including N,P,K,Mg,Fe, and Mn,as well as pigment contents were also improved dueto apply different anti-transpirants comparing to the control. The higher increment in the different tested 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.
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