Physico-chemical properties of mango fruits cv. Alphonso as influenced by the post flowering foliar nutrition

The investigation was carried out at Mango research Sub-Centre, Rameshwar, Sindhudurg during the season 2017-18 on uniformly growing, 30 years old Alphonso mango trees. The experiment was laid in RCBD design with three replications and seven treatments. The treatments included viz; Control (No spray), Urea (1 and 3%), Potassium nitrate (1 and 3%) and 19: 19: 19 NPK (1 and 3%). Two sprays were taken in each treatment as 1st spray at pea stage of fruit development and second spray was given at marble stage. The sigificantly maximum fruit length and breadth (9.27 cm and 7.97 cm, respectively) and highest fruit weight (245.33 g) were measured in T5 - KNO3 (3%) treatment. The least fruit weight (229.67 g) was recorded in Control (T1). At harvest stage, the highest T. S. S. (8.98 0B) was recorded in KNO3 (1%) treatment while at ripe stage, KNO3 (3%) exhibited highest T. S. S. (20.32 0B). The highest total sugars and ascorbic acid content (16.28% and 55.47 mg/ 100 g of fruit pulp, respectively) was found in KNO3 (3%) treatment. The spongy tissue intensity was significant reduced in the mango fruits by foliar nutrition. The lowest intensity (5.5 percent) was observed in KNO3 (3%) treatment.