Plant growth regulator taken up into the xylem through the leaves, stems, or roots. PaclobutrazolPlant growth regulatorFRAC 3 ... CV.p. 0.001 mPa (20 ºC)S.g./density 1.22 g/mlSolubility In water ... 7, 10 days). APPLICATIONS Mode of action Plant growth regulator taken up into the xylem through the ... begonias, freesias, poinsettias and bulbs) to inhibit growth; on rice to increase tillering, reduce lodging, ...