| Effect of preharvest sprays of calcium chloride and moringa leaf extract on creasing and quality of Washington navel orange fruits |
| Paper ID : 1018-FCANVU |
| Authors |
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eldesouki ibrahim arafat *1, Ezzat Mona Mohamed Helal2 1Agriculture Research Center, Horticulture Research Institute, Giza, Egypt 2الربع- تمى الامديد- الدقهلية |
| Abstract |
| Oranges fruit creasing is one of the major problems of production which leads to economic and quality losses. The study was carried out during 2018-2019 and 2019-2020 on Twelve-year-old trees of Washington navel orange at a private orchard, in Badaway, Al-Dakahlia governorate, Egypt to evaluate the impact of preharvest sprays of calcium chloride (CaCl2) and moringa leaf extract (MLE) on creasing and quality of Washington navel orange (Citrus sinensis L. Osbeck) fruits. The experiment was laid out in randomized block design with three replications and 9 treatments; T1= Control (distilled water only), T2= CaCl2 at 2%, T3= CaCl2 at 3%, T4= MLE at 20 ppm, T5= MLE at 30 ppm, T6= CaCl2 at 2% + MLE at 20 ppm, T7= CaCl2 at 2% + MLE at 30 ppm, T8= CaCl2 at 3% + MLE at 20 ppm and T9= CaCl2 at 3% + MLE at 30 ppm. The spraying treatments took place two times; in the third week of May (cell division of fruit lets stage) and July (at fruit development stage) in both seasons. The results showed that preharvest sprays of moringa leaf extract and/or CaCl2 significantly affected yield, fruit firmness, peel thickness, TSS, ascorbic acid, acidity, and fruit moisture contents. MLE increased fruit pectins, gibberellins, and calcium status, and simultaneously reduced fruit creasing. In summary, preharvest treatment of CaCl2 at 2% + MLE at 30 ppm was more effective in reducing the creasing and improving the quality of Washington navel orange fruits. |
| Keywords |
| creasing, calcium, moringa, extract, preharvest, pectins, gibberellins, Washington navel orange |
| Status: Accepted |