Influence of Pruning Month and Growth Regulators on Off-Season Flower Induction in G.I. Tagged Mysuru Jasmine (Jasminum sambac)
Keerthishankar, K. *
ICAR-KVK, Tiptur, Tumkur Dist. Karnataka, India.
Yathindra, H.A.
Department of Floriculture and Landscape Architecture, College of Horticulture, Bengaluru, India.
Mangala, K.P.
Department of Social Science, College of Horticulture, Bengaluru, India.
Ganavi, B.R.
ICAR-KVK, Tiptur, Tumkur Dist. Karnataka, India.
Shankar, M.H.
ICAR-KVK, Tiptur, Tumkur Dist. Karnataka, India.
Mutturaju, G.P.
Department of Entomology, College of Horticulture, Mysuru, India.
*Author to whom correspondence should be addressed.
Abstract
Regulation of flowering in jasmine has immense practical value. The time of peak flowering does not generally coincide with the time of greatest demand, therefore any method of modifying the flowering sequence will be helpful to farmers. An experiment was conducted on Jasminum sambac cv. Mysuru Mallige for Standardisation of off-season flower induction in G. I. tagged Mysuru Jasmine (Jasminum sambac) as influenced by pruning month and growth regulators on growth, quality and yield parameters. The design used for the experiment was FRCBD with three replications and 02 factors: pruning month and growth regulators. During off season flower impose, the results of this experiment envisaged that plants pruned during September month with foliar spray of nitrobenzene at 3 ml/l recorded maximum plant height (64.25 ± 0.36 cm, 72.08 ± 1.48 cm and 74.54 ± 1.85 cm) cm), chlorophyll content (1.02 ± 0.01 mg/g during February and 1.30 ± 0.02 mg/g during May), maximum bud length (1.432 ± 0.006 cm), bud diameter (0.915 ± 0.001 cm) and corolla tube length (1.252 ± 0.002 cm) and off-season flower yield per plant (0.77 ± 0.02 kg). Enhanced vegetative growth in early phase by exogenous application of nitrobenzene, which would have favored the increased photosynthesis and CN ratio. Further, it would have favored convenience of factors influencing floral initiation, that is the carbohydrate pathway.
Keywords: Geographical indication, vegetative growth, Mysuru Jasmine, horticulture