Abstract
Abstract The effects of several concn of growth retardant chemicals on the elongation of the last stem internode of cut tulips were studied. Compared to tap water, α-cyclopropyl-α-(4-methoxyphenyl)-5-pyrimidine-methanol (ancymidol) at 25 ppm reduced intemode growth by 31% with no detrimental effects on vase life or flower quality. The 2,4-dichlorobenzyl-tributylphos-phonium chloride (CBBP) was ineffective at 6-25 ppm. CBBP at 125 did reduce stem elongation but was toxic to the flower. Ancymidol in the vase solution retarded growth without altering water uptake by the stem.
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