Floral Initiation of Poinsettia Euphorbia Pulcherrima as Affected by Photoperiod and Different Rates of Paclobutrazol

The study aimed to determine the effect of paclobutrazol on the growth and flowering of poinsettia. Specifically, it aimed to determine the flowering response of poinsettia applied with different rates of paclobutrazol determine the rate of paclobutrazol most suited for the flowering of poinsettia and determine the effect of day length on the growth of poinsettia. This study was conducted at Sultan Kudarat State University, Tissue Culture Nursery, EJC Montilla, Tacurong City. The study was laid in a 3x3 factorial in Completely Randomized Design. Treatments consisted of the following Factor A was day length, categorized into 8 hours control 10 hours 2 hours extended and 12 hours 4 hours extended , and Factor B dealt with the rates of paclobutrazol with the following applications water only control 50 ppm, and 100 ppm. Each was replicated 3 three times with 10 experimental plants per treatment. Results showed that in terms of plant height and shoot length, poinsettia responded better when exposed to 12 hours day length. The earliest number of days to floral initiation was reached by those poinsettia exposed to 10 hours day length, while the earliest number of days to flowering and better plant vigor was obtained in plants exposed to 8 hours day length. The application of 50ppm paclobutrazol favors the growth and flowering of poinsettia. Aizel Y. Celeste | Jesusa D. Ortuoste "Floral Initiation of Poinsettia (Euphorbia Pulcherrima) as Affected by Photoperiod and Different Rates of Paclobutrazol" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-2 | Issue-6 , October 2018, URL: http://www.ijtsrd.com/papers/ijtsrd18628.pdf