Effect of ethephon and urea mixtures on flowering and plant quality of bromeliad (Guzmania lingulata)
To introduce flowering and improve the plant quality of bromeliad (Guzmania lingulata), a drop of the mixture solution of ethephon and urea on the top of plants at different concentrations (10 mL plant-1) was applied to 8-month-old plants grown in 6-inch pots and under 50% shade. The experiment was designed as factorial with 2 factors in CRD. The first factor was the concentration of ethephon, which was 0, 0.24, 0.48 and 0.72 g L-1 and the second factor was the concentration of urea, which was 0, 0.25, 0.5 and 0.75 g L-1. It was found that ethephon at 0.72 and 0.48 g L-1 induced 100 and 95% flowering within 3 weeks after treatments, respectively compared with 72.5 and 0% when the concentrations were 0.24 and 0 g L-1 while the concentration of urea had no effects. Length of flower spikes, diameter and color of floral bracts as well as width and length of leaves were not affected by the treatments. But ethephon treatments caused the yellowish color, marginal purple color and tip burn of leaves. The mixtures with urea were found to reduce the negative symptoms when the concentration of urea increased. In conclusion, the mixture solution of ethephon at 0.72 g L-1 and urea at 0.75 g L-1 application resulted in the earliest flowering and healthy green leaves.
Issarakraisila, M., Rundon, P. and Nuanla-ong, S. 2017. Effect of ethephon and urea mixtures on flowering and plant quality of bromeliad (Guzmania lingulata). Acta Hort. (ISHS) 1167:359-362
bromeliad, Guzmania lingulata, ethephon, urea, flowering