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V. SRILATHA*, Y.T.N. REDDY AND P. KARTHIK REDDY
University of Horticultural Sciences, GKVK Campus, Bengaluru-65
A study was conducted to evaluate the effects of pruning (current or previous season’s vegetative growth) and paclobutrazol (PBZ) @ 3 ml m-1 canopy diameter on the fruit yield and fruit quality of mango cvs. Raspuri, Dashehari and Amrapali during 2013-2014. Trees pruned to current season’s growth recorded 53.4, 17.3 and 11.8 per cent higher yields than unpruned trees. Similarly application of PBZ recorded 242.4, 163.1 and 52.8 per cent more number of fruits per tree, 13.4, 14.8 and 26.1 per cent decline in average fruit weight, and 171.2, 180.0 and 49.3 per cent higher yields than control trees of Raspuri, Dashehari and Amrapali respectively, when compared to control. Among the interaction effects, trees pruned to current season’s growth and with PBZ application recorded significantly higher fruit number (143.7) and higher yileds per tree (28.1 kg). Raspuri and Dashehari trees pruned to current season’s growth recorded high TSS (20.13 and 20.16 °Brix, respectively) compared to control trees (P3). Similarly, trees without PBZ application (C2) recorded higher TSS of 19.89 and 21.25 °Brix in cvs Raspuri and Dashehari, respectively. PBZ application recorded significantly higher ascorbic acid and carotenoid contents in Dashehari and Amrapali cultivars. The effects of PBZ alone or in combination with pruning were nonsignificant with respect to total sugars, nonreducing sugars and reducing sugars. The study indicated that, the responses of pruning and PBZ treatments varied with the bearing habit of the cultivars. Pruning of current season’s growth and application of PBZ treatment was more pronounced in influencing the fruit yield and fruit quality of alternate bearing cultivars of Raspuri and Dashehari.
Mango, Pruning, Paclobutrazol, Fruit yield, Fruit quality