THIS EXPERIMENT was executed in an olive private farm at Cairo Alexandria desert road (64 kilometer) to study the impact of foliar application of Cytofex (10ml/L, 20ml/L and 30ml/L) and Naftoscene (0.5ml/L, 0.75ml/L and 1.0ml/L) 15 days after full bloom on ‘Kalamata' olive trees planted 6X4m and irrigated with drip irrigation. The farm received the recommended field managements of Horticulture Research Institute. Concerning the number of retained fruits/m of “Kalamata" olive cv., Naftoscene at 0.75ml/L & 1.0ml/L increased significantly number of retained fruits compared to the control and other treatments after spraying, after June drop, and before harvesting during 2011 season, Whereas, Cytofex at 20ml/L & 30ml/L and Naftoscene at 0.5 ml/L & 0.75ml/L surpassed the rest of treatments and the control after June drop, and before harvesting in September in 2012 season. On the contrary, Cytofex at 30ml/L gave the least significant values of fruit drop after spraying, after June drop and before harvesting in both seasons. Cytofex at 30ml/L and 20ml/L influenced significantly fruit weight, flesh weight, oil as fresh weight and dry weight and finally the yield in both seasons, although Cytofex at 30ml/L and Naftoscene at 0.5ml/L gave the highest significant value of high moisture content in both seasons. Therefore Cytofex at 30ml/L can be recommended to be applied for olive to improve production of fruits and oil percentage, and in the meantime decreased the number of fruit drop.