Abscission: Abscission (from latin �ab = away� and �scindere = to cut) is shedding of various parts specially leaves and fruits of plant. Due to various causes such as drought, lack of nutrients, senescence, deficiency of light etc., the formation of ethylene and abscisic acid increases thereby a abscission layer is formed at the base of pedicle and petiole. This layer checks the transportation of materials between plants and leaf/fruit. After some time this leaf/fruit is isolated from plant. The isolation of fruits after ripening is caused so. IAA hormone delays abscission and senescence. If IAA in appropriate concentration would sprayed them abscission is delayed for a time.