The treatment consisted of different doses of Paclobutrazol (PP333) namely 1.0 gram and 0.5g/canopy diameter along with control. Paclobutrazol was applied once in a year 15 October 1997 and 15 September 1998 in soil around the tree canopy spread. Paclobutrazol did not affect on sugar, color, glucose-fructose ratio reduced sugar concentration and did not affect TSS and firmness of Mango, increased TSS, ascorbic acid, chlorophyll, Carotene, amylase, peroxides activity for 12 days in Dashehari Mango in storage at ambient temperature (30-33°C), Applying paclobutrazol at 1.0 gram on 15 October produced the highest number of fruits as well as yield per plant and the heaviest fruit compared with the lowest yield in control. Paclobutrazol at 1.0 gram applied on 15 October also resulted in higher edible portion, lower stone pulp ratio and peel pulp ratio, longer shelf life, higher TSS, increased vitamin C, lower titratable acidity, higher dry matter, reducing, non-reducing and total sugar contents as compared lower doses 0.5 gram with control plants. The present results suggest that the application of paclobutrazol at 1.0 gram in October enhances yield and quality in mango. chemical used Paclobutrazol [(2RS, 3RS)-1-1(4-Chlorophenyl)-4, 4-dimethyl-2- (1, 2, 4-trizol)-1-yl)] Pentan-3-ethanol.
Keywords: Auxins (IAA), Cytokinins and Plant growth regulator, Gibberellins, Paclobutrazol (PBZ), Yield and quality of mango, soil drench application of Paclobutrazol.