Abstract
The present investigation Efficacy of plant growth retardants on growth, flowering, yield and shelf life of dahlia (Dahlia variabilis L.) cv. Shubhra was conducted in Research Field, Department of Horticulture, Sam Higginbottom University of Agriculture, Technology and Sciences, Prayagraj, during winter season (2022-23). The experiment was laid out in Randomized block design (RBD). There are 9th treatment combination Cycocel (1000,1500, 2000 ppm), Malic Hydrazide (1000,2000,3000 ppm), Paclobutrazol (50,100,150 ppm). T6 malic hydrazide (3000 ppm) better performance compared to others growth retardants treatments parameters like, plant height (70.71 cm), number of leaves plant-1(119.43), number of branches plant-1(7.58), stem diameter (2.36 cm), average of length branches (71.29 cm), days taken for first flower bud initiation (64.96), complete opening of flower days (7.32), number of flower plant-1(17.42), flower diameter(16.07 cm), flower weight (62.35 g), plant peduncle length(16.19 cm), number of flower yield plot-1 (156.81), number of flower yield ha-1 (65.18 ton.) and shelf life of flower (14.37 days).
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