الفهرس 
Introductionيوجد فقط 14 صفحة متاحة للعرض العام
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المستخلص
The field work of this investigation was conducted at private orchard located at El-Qusiya district (350 km southern Cairo city), Assiut Governorate- Egypt, during two successive seasons 2017/2018 and 2018/2019. Ten Years old, twenty uniforms in vigor own-rooted Manfalouty pomegranate trees were used in this investigation, where the soil texture is heavy clay and water table depth is not less than two meters. However, surface irrigation system was used.
The formation of the chosen trees is multi trunk (3 trunk/tree) an open vase system with 4 to 6 principal branches and at least two principal layers of production. Winter pruning was followed at the first week of January.
In order to study the effect and the suitable dose of spraying chitosan on Manfalouty pomegranate. Chitosan sprayed at five concentrations namely: 0.0, 50 ppm, 100 ppm, 200 ppm, and 400 ppm. All Chitosan concentrations were sprayed three times yearly: the first one at the beginning of growth, the second one just after fruit setting, and the last spray at one month later. Each treatment was replicated four times; one tree per each was used.
Conclusion:
Under El-Qusiya district, Assiut Governorate conditions, in nil valley clay soil, and similar conditions it could be recommended to treated Manfalouty pomegranate trees with chitosan at 200 ppm as a foliar application, in order to improve the leaves chemical composition, yield (kg/tree) as fruit numbers//tree and fruit weight (g) as well as fruit physical and chemical properties, to produce good yield with high-quality fruit.