Dr. A. BhagwanB.SANTHOSHI RANI2019-09-262019-09-262019-02-08Sri Konda Laxman Telangana State Horticultural University, Rajendranagar, Hyderabad-30http://krishikosh.egranth.ac.in/handle/1/5810129357The present investigation entitled “Effect of branch tip pruning in combination of paclobutrazol on flowering induction, yield and quality of mango (Mangifera indica L.) cv. Banganpalli” was carried out at Fruit Research Station, Sangareddy District, Telangana. Experiment was conducted on fifteen years old mango trees under randomized block design with factorial concept and replicated four times. Various flowering and yield parameters like number of panicles per branch, flowering percentage, days taken for flowering, days for 50% flowering and days for 100% flowering, fruit set per panicle at marble stage, number of fruits per panicle one month after marble stage, number of fruits per branch (60 days before harvest), fruit diameter (mm), fruit length (mm), fruit width (mm), number of fruits per tree at harvest maturity, fruit weight (g), yield per tree(kg), shelf life(days) and bio chemical factors like TSS(˚Brix), titrable acidity(%), pulp yield (g), reducing sugars(%), non- reducing sugars(%) and TSS to acid ratio were recorded. The readings were taken with BBCH scale. In the experiment, among different paclobutrazol doses, 2.0 ml per linear meter canopy has recorded significantly highest number of panicles per branch, flowering percentage, fruit set per panicle at marble stage, one month after marble stage and number of fruits at harvest stage. Same treatment recorded minimum number of days for flowering, day for 50% flowering and days for 100 % flowering. However, maximum fruit weight, fruit diameter, fruit length, fruit width, yield, pulp yield and shelf life were recorded with paclobutrazol 1.5 ml per linear meter canopy. Bio chemical parameters like TSS and TSS to acid ratio was significantly increased in 1.0 ml per linear meter canopy. Different branch tip pruning levels i.e., 5 cm level of branch tip pruning has recorded significantly highest number of panicles per branch, flowering percentage, fruit set per panicle at marble stage, one month after marble stage and number of fruits at harvest stage, fruit weight, yield, pulp yield and shelf life. Same treatment recorded minimum number of days for flowering, days for 50% and 100 % flowering. However, fruit diameter, fruit length, fruit width and bio chemical parameters like TSS and TSS to acid ratio was significantly increased in two whorl leaves of branch tip pruning. In interaction effects, paclobutrazol 2.0 ml per linear meter canopy with 5 cm level of branch tip pruning has recorded significantly maximum number of panicles per branch (35.84), flowering percentage (92.40), fruit set per panicle at marble stage (9.01) and one month after marble stage (7.90), number of fruits (23.32) per branch (60 days before harvest) and number of fruit per tree at harvest maturity (160). Minimum number of days for flowering (36.53) and for 100% flowering (32.02) were also observed in the same treatment combination. However, maximum fruit weight (578.45 g) and yield (78.62kg/tree) was significantly increased in treatment combination of paclobutrazol 1.5 ml per linear meter canopy with 5 cm level of branch tip pruning. Paclobutrazol 1.5 ml per linear meter canopy with two whorl leaves of branch tip pruning recorded maximum fruit length (362.51mm), diameter (352.51 mm) and fruit width (264.26 mm). Bio chemical parameters like TSS and TSS to acid ratio was significantly increased in treatment combination of paclobutrazol 1.0 ml per linear meter canopy with two whorl leaves of branch tip pruning. Highest benefit cost ratio (4.66) was recorded in paclobutrazol 1.5 ml per linear meter canopy with 5 cm level of branch tip pruning. In the present investigation, paclobutrazol acts by reducing the gibberellins biosynthesis, thus contributing to inhibit branch growth, promoting bud maturation and consequently favoring flowering and fruiting. Positive response with branch tip pruning might be due to removal of the apex of branches stimulates the budding of axillary buds and removes structures that inhibit reproductive buds. Among different levels of branch tip pruning and paclobutrazol, 1.5 ml per linear meter canopy with 5 cm level of branch tip pruning followed by 1.0 ml per linear meter canopy with two whorl leaves of branch tip pruning recorded maximum yield and quality parameters. CHAPTERThe present investigation entitled “Effect of branch tip pruning in combination of paclobutrazol on flowering induction, yield and quality of mango (Mangifera indica L.) cv. Banganpalli” was carried out at Fruit Research Station, Sangareddy District, Telangana. Experiment was conducted on fifteen years old mango trees under randomized block design with factorial concept and replicated four times. Various flowering and yield parameters like number of panicles per branch, flowering percentage, days taken for flowering, days for 50% flowering and days for 100% flowering, fruit set per panicle at marble stage, number of fruits per panicle one month after marble stage, number of fruits per branch (60 days before harvest), fruit diameter (mm), fruit length (mm), fruit width (mm), number of fruits per tree at harvest maturity, fruit weight (g), yield per tree(kg), shelf life(days) and bio chemical factors like TSS(˚Brix), titrable acidity(%), pulp yield (g), reducing sugars(%), non- reducing sugars(%) and TSS to acid ratio were recorded. The readings were taken with BBCH scale. In the experiment, among different paclobutrazol doses, 2.0 ml per linear meter canopy has recorded significantly highest number of panicles per branch, flowering percentage, fruit set per panicle at marble stage, one month after marble stage and number of fruits at harvest stage. Same treatment recorded minimum number of days for flowering, day for 50% flowering and days for 100 % flowering. However, maximum fruit weight, fruit diameter, fruit length, fruit width, yield, pulp yield and shelf life were recorded with paclobutrazol 1.5 ml per linear meter canopy. Bio chemical parameters like TSS and TSS to acid ratio was significantly increased in 1.0 ml per linear meter canopy. Different branch tip pruning levels i.e., 5 cm level of branch tip pruning has recorded significantly highest number of panicles per branch, flowering percentage, fruit set per panicle at marble stage, one month after marble stage and number of fruits at harvest stage, fruit weight, yield, pulp yield and shelf life. Same treatment recorded minimum number of days for flowering, days for 50% and 100 % flowering. However, fruit diameter, fruit length, fruit width and bio chemical parameters like TSS and TSS to acid ratio was significantly increased in two whorl leaves of branch tip pruning. In interaction effects, paclobutrazol 2.0 ml per linear meter canopy with 5 cm level of branch tip pruning has recorded significantly maximum number of panicles per branch (35.84), flowering percentage (92.40), fruit set per panicle at marble stage (9.01) and one month after marble stage (7.90), number of fruits (23.32) per branch (60 days before harvest) and number of fruit per tree at harvest maturity (160). Minimum number of days for flowering (36.53) and for 100% flowering (32.02) were also observed in the same treatment combination. However, maximum fruit weight (578.45 g) and yield (78.62kg/tree) was significantly increased in treatment combination of paclobutrazol 1.5 ml per linear meter canopy with 5 cm level of branch tip pruning. Paclobutrazol 1.5 ml per linear meter canopy with two whorl leaves of branch tip pruning recorded maximum fruit length (362.51mm), diameter (352.51 mm) and fruit width (264.26 mm). Bio chemical parameters like TSS and TSS to acid ratio was significantly increased in treatment combination of paclobutrazol 1.0 ml per linear meter canopy with two whorl leaves of branch tip pruning. Highest benefit cost ratio (4.66) was recorded in paclobutrazol 1.5 ml per linear meter canopy with 5 cm level of branch tip pruning. In the present investigation, paclobutrazol acts by reducing the gibberellins biosynthesis, thus contributing to inhibit branch growth, promoting bud maturation and consequently favoring flowering and fruiting. Positive response with branch tip pruning might be due to removal of the apex of branches stimulates the budding of axillary buds and removes structures that inhibit reproductive buds. Among different levels of branch tip pruning and paclobutrazol, 1.5 ml per linear meter canopy with 5 cm level of branch tip pruning followed by 1.0 ml per linear meter canopy with two whorl leaves of branch tip pruning recorded maximum yield and quality parameters.ennullThesis