الفهرس 
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Abstract
This experiment was carried out during 2021 and 2022 seasons, on ten years old ”Anna” apple trees, planted at 4*4 meters apart in a sandy clay loam soil under drip irrigation in a private orchard located at El Omid region, Marsa Matruh governorate, Egypt. One hundred tree were selected in the same vigor for performing this study and all of them were received to the applied cultural practices. Three sprays with water only (control), nano silver at 10, 12.5 and 15 mL/L, nano zinc at 100, 200 and 300 ppm and zinc at 0.25, 0.5 and 1 g/L were applied on the trees before flowering, during the full bloom and one month later. Every treatments contained ten trees (ten replicates) and all the treatments were designed in a randomized complete block design.