Plant Growth Regulator - Maleic hydrazide

NOMENCLATURE Common name paclobutrazol (BSI, draft E-ISO, (m) draft F-ISO, ANSI) IUPAC name (2RS,3RS)-1-(4-chlorophenyl)-4,4-dimethyl-2-(1H-1,2,4-triazol-1-yl)pentan-3-ol Chemical Abstracts name (R*,R*)-(?-b-[(4-chlorophenyl)methyl]-a-(1,1-dimethylethyl)-1H-1,2,4-triazole-1-ethanol CAS RN [76738-62-0] stated stereoisomers


Plant growth regulator taken up into the xylem through the leaves, stems, or roots, and translocated to growing sub-apical meristems. Produces more compact plants and enhances flowering and fruiting.


Used on fruit trees to inhibit vegetative growth and to improve fruit set; on pot-grown ornamentals and flower crops (e.g. chrysanthemums, begonias, freesias, poinsettias and bulbs) to inhibit growth; on rice to increase tillering, reduce lodging, and increase yield; on turf to retard growth; and on grass seed crops to reduce height and prevent lodging. To be applied as a foliar spray, as a soil drench, or by trunk injection. Has some fungicidal activity against mildew and rusts.

Production formulation

Paclobutrazol 95%TC
Paclobutrazol 15%WP
Paclobutrazol 50%SC