Vol. 7, Issue 12 (2018)

Author(s):
Vinod Kumar Nellipalli and Arun Kumar Pal

Abstract:
A field experiment was carried out in Horticulture Research Farm, Bidhan Chandra Krishi Vishwavidyalaya, Mohanpur, to study the effect of paclobutrazol as foliar spray at different dates, on growth, flowering and bulb yield of tuberose (Polianthes tuberosa L.) var. Prajwal. The experiment was carried out during the year 2016 - 2018 (March - March) to find out the suitable dose of paclobutrazol and suitable time of its spraying to get maximum flower production. The experiment was laid out in augmented factorial randomized block design with three replications. The first factor contains three different doses of Paclobutrazol application P₁ (100 ppm), P₂ (200 ppm), P₃ (300 ppm) as foliar spray and the second factor is with three different times of Paclobutrazol application i.e., S₁ (45 DAP), S₂ (65 DAP), S₃ (85 DAP). A control plot is made without any application of paclobutrazol to observe the difference in the treatment effect. The results reveal that, compared to all other treatments control produced more number of bulbs per plot. With respect to paclobutrazol treatments, foliar application of 100 ppm of Paclobutrazol (P₁) on the tuberose plants had given the maximum bulb yield regarding small, medium, large and total number of bulbs. With respect to different spraying times, foliar application of paclobutrazol at 45 DAP (S₁) on the tuberose plants had given the maximum number of small bulbs whereas, foliar application of paclobutrazol at 85 DAP (S₃) had given maximum number of medium large and total number of bulbs. Significantly maximum total number of bulbs per plot were observed with the treatment combination P₁S₃ (100 ppm PBZ and 85 DAP).