particularly during the period of flowering and fruit set. It is concluded that the better osmoregulation capacity may be associated with better flowering and fruiting performance with low fruit drop in Amrapali (regular bearer) than Langra cultivar of mango (Mangifera indica L.). The present study is also useful to decide the differential irrigation schedule at critical stage to enhance the flowering and reduce the fruit drops for more fruit yield particularly in low osmotic adjustment capacity cultivars Langra.