This experiment carried out during 2012 and 2013experimental seasons on "Le-Conte" pear trees. The Kaolin was applied on the canopy surface of trees in well-irrigated and water stress conditions at the beginning of growth, after fruit set and 4 weeks before the commercial harvest as follows: Well-Irrigated Control (WIC), Well-Irrigated + 1% Kaolin (WI1K), Well-Irrigated + 3% Kaolin (WI3K), Well-Irrigated + 5% Kaolin (WI5K), Well-Irrigated + 7% Kaolin (WI7K), Stress-Irrigated Control (SIC), Stress-Irrigated + 1% Kaolin (SI1K), Stress-Irrigated + 3% Kaolin (SI3K), Stress-Irrigated + 5% Kaolin (SI5K) and Stress-Irrigated + 7% Kaolin (SI7K). Data indicated that all well and stress irrigation treatments plus spraying Kaolin tended to increase shoot length as compared with controls (WIC and SIC). Moreover, SI5K and SI3K treatments gave the highest significant value for the shoot thickness. WI3K, WI5K and SI5K treatments gave the highest significant value in leaf area. Also, SI5K, SI3K and SI7Ktreatments significantly increased fruit set percentage and decreased fruit drop percent compared to all well treatments, SI1K and the two controls (WIC and SIC) during both growing seasons. Furthermore, all well irrigation water with kaolin treatments increased average fruit weight as compared with stress irrigation water treatments, while all stress irrigation water with kaolin treatments increased number of fruits per tree as compared with well irrigation water treatments as well as control treatments during both seasons of the study. Also, SIC treatment gave the highest significant T.S.S percent compared with well irrigation treatments and WIC. Stress irrigation treatments decreased acidity percent fruit content as compared with well irrigation treatments, while all kaolin concentrations showed no effect on it. At the meantime, all stress treatments especially, SI7K increased vitamin content, as compared with WIC and SIC. Also, it was found that well irrigated increased N, P and K percentages in “Le-conte" pear leaf as compared with stress water treatments.