Effect of stem tip pruning and bioregulators on endogenous Abscisic Acid (ABA), Cytokinins (DHZR’S AND (ZR’s), Gibberellic acid (GA3), Auxin (IAA) contents at flower bud swelling stage (510 Stage OF BBCH Scale) in Mango (Mangifera indica L) CV. Banganpalli under high density planting system

Abstract

An experiment on the effect of bio regulators (B1 -Gibberilic acid GA3 @50 ppm, B2 -6 Benzyl aminopurine 6 BA@ 200 ppm, B3 -Paclobutrazol PBZ@1500ppm, B4 -Napthaleine acetic acid NAA @ 100 ppm, B5 -PBZ @1500ppm+BA @ 200 ppm, B6 -PBZ @1500ppm+ NAA@100 ppm, B7 -GA3 @.50 ppm+ PBZ@ 1500ppm, B8- Untreated Control) and stem tip pruning (P1 -with stem tip pruning, P2 -without stem tip pruning) was conducted on endogenous abscisic acid (ABA), auxin (IAA), cytokinins (DHZR’S AND (ZR’S), gibberellic acid (GA3), at flower bud swelling stage (510 stage of bbch scale)in mango cv. Banganpalli under high density planting system. Paclobutrazol in combination with 6 benzyl aminopurine (6-BA) (B5) along with stem tip pruning (P1) has significantly resulted in highest endogenous ABA, cytokinins, lowest GA3 contents at flower bud swelling stage (510 stage of BBCH scale).