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<p>Bagging date palm bunches is a&#xa0;process commonly used to modify the micro-environment during fruit development, thereby improving fruit quality and protecting fruits from insects and diseases. A&#xa0;field study was carried out during the 2023 and 2024 growing seasons to examine the effect of covering bunches with polyethylene bags of different colors and permeability levels on fruit quality of ‘Siwi’ dates. The trees were grown in sandy soil in a&#xa0;private orchard located in the city of Mut in Dakhla, New Valley Governorate, Egypt. Bunch covering was carried out at the beginning of the Khalal stage. Date palm bunches were subjected to 11 bagging treatments with perforated white, black, red, blue, and green polyethylene bags with 63% or 73% of light permeability. All bagging treatments significantly improved fruit quality attributes, including fruit weight, volume, length, diameter, flesh weight, total soluble solids, and total and reducing sugars contents, compared to the control treatment. The black, blue, and red polyethylene bags significantly improved fruit weight, fruit size, flesh weight, length, and diameter, and provided the highest percentages of total sugars, reducing sugars, and total soluble solids compared with the white and green bags, while there was a&#xa0;slight difference between the two light permeability levels. Therefore, black or blue polyethylene bags are recommended for improving fruit quality of ‘Siwi’ dates.</p>

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Effect of Preharvest Bunch Bagging on Quality of Date Palm (Phoenix dactylifera L. cv. ‘Siwi’)

  • 期刊论文

  • 发表日期：

    2026年7月6日

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  • Magda M. Khattab,
  • Ezzeldin G. Gadalla,
  • Abdou M. Abdalltif,
  • HebaAllah Samy

摘要

Bagging date palm bunches is a process commonly used to modify the micro-environment during fruit development, thereby improving fruit quality and protecting fruits from insects and diseases. A field study was carried out during the 2023 and 2024 growing seasons to examine the effect of covering bunches with polyethylene bags of different colors and permeability levels on fruit quality of ‘Siwi’ dates. The trees were grown in sandy soil in a private orchard located in the city of Mut in Dakhla, New Valley Governorate, Egypt. Bunch covering was carried out at the beginning of the Khalal stage. Date palm bunches were subjected to 11 bagging treatments with perforated white, black, red, blue, and green polyethylene bags with 63% or 73% of light permeability. All bagging treatments significantly improved fruit quality attributes, including fruit weight, volume, length, diameter, flesh weight, total soluble solids, and total and reducing sugars contents, compared to the control treatment. The black, blue, and red polyethylene bags significantly improved fruit weight, fruit size, flesh weight, length, and diameter, and provided the highest percentages of total sugars, reducing sugars, and total soluble solids compared with the white and green bags, while there was a slight difference between the two light permeability levels. Therefore, black or blue polyethylene bags are recommended for improving fruit quality of ‘Siwi’ dates.