Effects of pruning and growth regulators on off-season flower induction in ‘Udupi Jasmine’

Published

2025-06-30

DOI:

https://doi.org/10.58993/ijh/2025.82.2.14

Keywords:

Udupi jasmine, off-season, pruning, growth regulator
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Authors

  • Shreedevi Badiger Department of Floriculture and Landscaping Architecture, College of Horticulture, Mudigere 577132, Karnataka, India
  • Nataraj S K Department of Floriculture and Landscaping Architecture, College of Horticulture, Mudigere-577132, Karnataka, India.
  • Satish K M Department of Biotechnology, KSNUAHS, Shivamogga-577201, Karnataka, India. Krishi Vidnyana Kendra, Bramhavar, Udupi-576101, Karnataka, India.
  • Chaitanya HS Department of Vegetable Science, College of Horticulture, Mudigere-577132, Karnataka, India.
  • Srinivasa V Department of Vegetable Science and Floriculture, Choudhary Sarwan Kumar Himachal Pradesh Krishi Vishvavidhyalaya, Palampur-176062, Himachal Pradesh, India.
  • Harish B M M Department of Vegetable Science and Floriculture, Choudhary Sarwan Kumar Himachal Pradesh Krishi Vishvavidhyalaya, Palampur-176062, Himachal Pradesh, India.

Abstract

‘Udupi Jasmine’ (Jasminum sambac var. aeyaneanum) is an important flower crop of coastal Karnataka possessing a geographical indication tag, having peak season during March-April and an off-season for blooming commencing during November-February. Present study was conducted to induce off-season flowering through growth regulators and pruning in ‘Udupi Jasmine’ by treating with different growth regulators and pruning intervals and elucidate the interaction between both on plant growth and flowering traits of the crop. The effect of pruning in October recorded the highest plant height (109.08cm), number of primary shoots (24.11) number of secondary shoots (111.58), number of flowers per shoot (108.71), individual flower weight (0.07g) and flowers weight per plant (111.85g) and the plant growth regulator GA3 @ 150ppm recorded the highest plant height (119.02cm), number of primary shoots (33.28) and number of secondary shoots (130.75), number of flowers per shoot (118.00) and flowers weight per plant (132.22g) and CCC at 1200ppm shown to increase flower weight (0.09g). Interaction between October pruning and growth regulator GA3 @ 150 ppm reported the highest plant height (124.44 cm), number of primary shoots (33.80), number of secondary shoots (134.97), number of flowers per shoot (122.87) and flowers weight per plant (135.78g). Whereas, the maximum individual flower weight (0.10g) was recorded in plant pruned during November with CCC f oliar spray at 1200ppm.

How to Cite

Badiger, S., Nataraj S K, Satish K M, Chaitanya HS, Srinivasa V, & M, H. B. M. (2025). Effects of pruning and growth regulators on off-season flower induction in ‘Udupi Jasmine’. Indian Journal of Horticulture, 82(02), 217–222. https://doi.org/10.58993/ijh/2025.82.2.14

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