PACLOBUTRAZOL AND CYTOKININ TO PRODUCE IRIS (Iris x hollandica Tub.) IN POTS

Because of the increasing and diversified demand for potted plants, there is interest in Argentina in commercial iris production (Iris x hollandica Tub.). Two experiments were performed at the Instituto Nacional de Tecnologia Agropecuaria (INTA), San Pedro Agricultural Experimental Station (33o41’ S, 59o41’ W), Buenos Aires Province. The effects of increasing concentrations of paclobutrazol (PBZ) and combinations of PBZ and 6-benzylaminopurine (BA) were compared. Height, length of the cycle and rate of flowering were registered. Experiment 1: the bulbs were subjected to immersion in nine concentrations of PBZ: 0, 10, 20, 30, 40, 50, 60, 70 or 80 mg L -1 for 24 h. Experiment