S. SENTHILKUMAR*, R. M. VIJAYAKUMAR, K. SOORIANATHASUNDARAM AND D. DURGA
DEVI
Department of Fruit Crops, Tamil Nadu Agricultural University, Coimbatore-641 003 (Tamil Nadu), India
*(e-mail : senthilshanmugam87@gmail.com; Mobile : 94864-75411)
ABSTRACT
In viticulture, GA3 has been widely applied for enhancing production and has a potential impact over the growth and development in berries of grape. It is the most applicable fact in any new introduced exotic varieties in grape prior to commercial release. An investigation was performed to study the effect of GA3 over other PGR’s and stage of application on yield and economic traits in grape (Vitis vinifera L.) cv. Italia at Horticultural College and Research Institute, TNAU, Coimbatore. The treatments imposed over the vines pruned to standardized pruning level viz., pruning 50% canes for crop yield and remaining 50% for vegetative growth. The study revealed that the bunch sprays with GA3 (10 ppm) in combination with brassinosteroid (1 ppm) at 7-8 mm berry size stage recorded the optimum vine yield of 12.70 kg/vine. An economic analysis of the monetary gains received from the various treatments revealed that the application of GA3 (10 ppm) along with brassinosteroid (1 ppm) at 7-8 mm berry size stage recorded the highest benefit : cost ratio of 3.13 over control.
Key words : Grape, Italia, gibberellic acid, yield, economics