Vol. 11, Issue 11 (2022)

An experiment on the effect of bio regulators (B₁ -Gibberellic acid GA₃ @50 ppm, B₂ -6 Benzyl amino purine 6 BA@ 200 ppm, B₃ -Paclobutrazol PBZ@1500 ppm, B₄ -Napthaleine acetic acid NAA @ 100 ppm, B₅ -PBZ @1500 ppm+BA @ 200 ppm, B₆ -PBZ @1500 ppm+ NAA@100 ppm, B₇ -GA₃ @.50 ppm+ PBZ@ 1500 ppm, B₈- Untreated Control) and stem tip pruning (P₁ -with stem tip pruning, P2 -without stem tip pruning) was conducted on flowering, fruit set and yield of mango cv. Banganpalli under high density planting system. Paclobutrazol in combination with 6 benzyl amino purine (6-BA) (B₅) along with stem tip pruning (P₁) during flower bud d ifferentiation stage has significantly resulted in highest endogenous ABA, cytokinins, lowest GA₃ contents at flower bud swelling stage (510 stage of BBCH scale) which in turn resulted in early panicle initiation, increased percent flowering (23.39% increase over control), highest number of hermaphrodite flowers over control, significantly highest number of fruits, highest fruit weight which subsequently resulted in highest yield (40.40% over control).