Effect of gibberellin acid (GA3) on flowering inhibition of pineapple cv. Pataviea after flowering stimulus by
ethylene was conducted at Lampang Agricultural Research and Training Centre. The GA used spray on leave at
three levels (i.e. 10 20 and 40 ppm.) compared with plant used ethylene and control (no spray). The results
showed that, the plant use GA treated have the highest of growth rate of old and new leaf length. The plants were
treated by GA at 20 ppm have the days of flowering higher than the other treatments.
Key words : pineapple, flowering, gibberellin (GA)