Control of flowering and bulb maturation in Dendrobium by uniconazol.

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Uniconazole was used as foliar spray on Dendrobium X Pink Doll Elegance and Yukidaruma King to control height and bulb maturation. When 12.5mg/l uniconazole was applied twice on the new shoots (lead bulb), the plant height and number of leave decreased, on the otherhand stem daiamter increased. Flowering of the treated plants was delayed with lower numbers of florets. The result suggested that maturation of the lead bulb was delayed by uniconazole treatment. Plants treated with uniconazole at earlier stage produced shorter shoots in the following year. No delay of flowering was observed in the following year.