National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
A field trial was conducted in the Department of Floriculture and Landscaping, Orissa University of Agriculture and Technology, Bhubaneswar to find out the effect of plant growth regulators at three concentrations viz, NAA (25, 50 & 100ppm) on growth and flowering of Vinca rosea (Catharanthus roseus L.) during May 2015 to September 2015. The growth regulators were applied in form of foliar spray, once at 30 days after planting (DAS) seedlings and again after 30days of first application. Plants sprayed with distilled water served as control. The results of the study revealed that application of NAA at 50ppm significantly reduced plant height (28.33, 30.13, 30.53, 36.33 & 43.76cm) number of leaves (364.33) per plant. However, number of branches per plant were significantly improved due to application of NAA 25ppm (19.33) & NAA100ppm (18.66) without showing significant variation from each other. Besides significant delay in flower bud initiation (20.66 days). Although application of NAA at 25ppm & 100ppm significantly increased the number of flowers (18.80 & 17.96 nos respectively) per plant, the size of flowers was significantly increased (5.86 cm & 5.06 cm dia respectively) under these treatments as compared to control.
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