Apple trees are particularly sensitive to low soil moisture. Water stress during the growing season reduces number and size of fruits, and increases June drop. Success of apple largely depends on uniform distribution of rain during the year in case of dry spells during the critical periods supplementary irrigation should be provided. Water stress conditions results in poor fruit set, heavy fruit drop, low production and poor quality. The most critical periods of water requirement are April August and peak water requirement is after fruit set. Normally the orchards are irrigated immediately after manuring in the month of December-January. During the summer periods, the crop is irrigated at an interval of 7-10 days. After the fruit setting stage the crop is irrigated at weekly intervals. Application of water during the fortnight preceding harvest markedly improves the fruit color. Thereafter till the onset of dormancy, irrigation is given at an interval of 3-4 weeks.