Multiple Cyclanilide Applications Promote Branching of Woody Ornamentals

Abstract Single applications of 0 to 200 ppm cyclanilide (CYC), an experimental bioregulator effective in stimulating lateral branching in fruit trees, were applied to the foliage of 19 species or cultivars of woody landscape shrubs over the 2004 and 2005 seasons, 12 of which exhibited increased branching in response to treatment. New shoot increases were concentration and species dependent. Compared to untreated controls at 30 days after treatment (DAT) in 2004, new shoots increased from 14 to 317% across Florida anise, ‘Elizabeth Ann’ Japanese camellia, ‘Nigra’ inkberry holly, ‘Chinsan’ azalea, ‘Red Slippers’ azalea, ‘Watchet’ azalea, ‘Ellen Huff’ oakleaf hydrangea, ‘Brandy's Temper’ sasanqua camellia, and Eleanor Taber™ Indian hawthorn following CYC application. In 2005, shoot increases at 60 DAT ranged from 32 to 240% across ‘Ellen Huff’ oakleaf hydrangea, ‘Brandy's Temper’ sasanqua camellia, Eleanor Taber™ Indian hawthorn, Olivia™ Indian hawthorn, ‘Sky Pencil’ holly, and ‘Foster’ holly. Plant size de...