HortScience · 1983 · 33 citations · 0 references
AgricultureAgronomyPlant SciencesHerbicide Application TechnologyHerbicide ChemistryPlant EcophysiologyFlowering PhysiologyPlant Growth RegulationPlant Growth Regulation By HerbicidesBotanical BioassaysFoliar Spray ApplicationsPlant Height ControlPlant Height ImprovementPlant Height ModificationPlant Height ReductionSeedling BioassaysSoil Drench Applications
Abstract Height of potted chrysanthemums ( Chrysanthemum × morifolium Ramat.) was effectively controlled by soil drench applications of paclobutrazol [ICI-PP-333 = (2RS, 3RS)-l-(4-chlorophenyl)-4,4-dimethyl-2-l,2,4-triazol-l-yl-pentan-3-ol]. While response to the chemical depended on normal flowering height of each cultivar, rates of 0.125–0.750 mg ai/15-cm pot were effective on the tall- and medium-height cultivars tested. Aqueous foliar sprays were ineffective in controlling plant height. Foliar sprays of paclobutrazol mixed in 15% ethanol caused significant height reduction of chrysanthemum. Foliar sprays were not as effective as soil drench applications for controlling growth.