Effect of growth substances on vase life and bulb production in tuberose (Polianthes tuberosa L.) cv. pearl double

Tuberose, the alluring cut flower is a major representative of bulbous flower group. Hence, considering its economic importance, the present investigation entitled “Effect of growth substances on bulb production and vase life of tuberose (Polianthes tuberosa L.) cv.Pearl Double” was carried out at Horticultural Research Farm of Department of Horticulture, C. C. S. University, Meerut. The soil of the experimental area was sandy loam and neutral in reaction. The total number of treatments were 10 comprising 3 levels of each i.e. ethrel (100, 150 and 200 ppm), maleic hydrazide (50, 100 and 150 ppm) and cycocel (3000, 5000 and 7000 ppm) with control.The experiment was laid out in randomized block design with three replications. The salient features of the present study are summarized as the vase life along with all bub production parameters were significantly influenced with all treatments. The longest vase life (13.03 and 13.53)as well as highest bulb per clump(3.24 and 3.30) wereobserved with T5 (MH-100ppm) while, maximum weight (80.84 and 83.07) and diameter (3.26 and 3.95) of biggest bulb per clump were recorded with T2 (Ethre1-150ppm). It is also evident from the data that maximum number of bulblets per clump (23.96 and 24.94) as well as weight of bulb (48.04 and 48.69) and bulblets (23.31 and 23.87) were recorded with T8 (CCC-5000 ppm) while, highest yield of bulb and bulblets (262.38 and 273.60 q/ha) were recorded with T5 (MH-100ppm) during both the years of investigation.