flowersThe effects of BA on the vase life of cut ‘Kokucho’ dahlia flowerswere investigated. We modified the method to apply BA directly topetals by spraying instead of dipping them because a large amountof BA solution would be required for dipping whole dahlia flow-ers. The vase life of cut dahlia flowers sprayed with 50, 100 and500 M BA was significantly extended compared to the controls(Table 6 and Fig. 3). Outer petals sprayed with BA tended to bereflective, like the straight cactus petal form. A pulse treatment with100 or 500 M BA based on immersing the cut end of flower stemstended to shorten the vase life. The amount of 50, 100 and 500 M