Influence of Foliar Spray of Brassinosteroids (BR), Salicylic Acid (SA) and Gibberellic Acid (GA3) on Vegetative Growth and Flowering Parameters of Cucumber (Cucumis sativus L) cv. Arpit.

Abstract

An investigation entitled “Influence of foliar spray of Brassinosteroids (BR), Salicylic acid (SA) and Gibberellic acid (GA3) on vegetative and flowering parameters of Cucumber (Cucumis sativus L) cv. Arpit” was carried out at the Vegetable Research Farm, Department of Horticulture, Sam Higginbottom University of Agriculture, Technology & Science, Prayagraj, (U.P.) - 211007 during the year 2018-19 and 2019-2020. The experiment was laid out in a Randomized Block Design with 15 treatments and 3 replications and each replicated thrice. Source of variables were Brassinosteroids (BR) 0.05 PPM, Brassinosteroids (BR) 0.10 PPM, Brassinosteroids (BR) 0.5 PPM, Brassinosteroids (BR) 1.0 PPM, Brassinosteroids (BR) 2.0 PPM, Salicylic acid (SA) 0.05 mM, Salicylic acid (SA) 0.10mM, Salicylic acid (SA) 0.2mM, Salicylic acid (SA) 0.5mM, Salicylic acid (SA) 1.0mM, Gibberellic acid (GA3) 25 PPM, Gibberellic acid(GA3) 50 PPM, Gibberellic acid(GA3) 100 PPM, Gibberellic acid (GA3) 150 PPM  and combination of them with control treatment taken as 15 treatments. As far as the vegetative growth and flowering is concerned, application of different treatment of plant growth regulators significantly enhanced the Length of main vine (cm), Number of branches per plant, Number of leaves per plant, Diameter of main stem (cm), Inter-nodal distance (cm), Leaf area (cm2), Days to first flower bud initiate (DAS), Days taken to 50% flowering, Number of male flower per plant, Number of female flower per plant at all successive stages. The maximum vine length (143.17 and 146.04cm), number of leaves per plant (93.74 and 94.74), number of branches per plant (19.49 and 19.82), diameter of main stem (14.70 and 16.02cm), leaf area (277.42 and 280.90 cm2), internodal distance (7.27 and 6.97cm) and as per flowering parameters lowest days taken to first flower bud initiation (36.66 and 35.73 days), days taken to 50% flowering (42.40 and 422.73 days), number of male flower per plant (91.71 and 92.05) and  number of female flower per plant (47.59 and 46.92) were recorded in both successive year with T5 (Brassinosteroids (BR) 2.0 PPM) and minimum growth and flowering were observed in T0 (control).