Abstract
Heliconia stricta Huber `Dwarf Jamaican' were grown in 10-liter containers under full sun or 50% shade for 1 year, and H. caribaea Lamarck `Purpurea' were grown in an open field for 2.5 years. Rhizomes were soaked for 1 hour before planting or plants were sprayed with 30 μm DCPTA after two leaves had emerged. Heliconia stricta grown under full sun produced more inflorescences than those grown under 50% shade, and DCPTA-treated plants grown under shade produced more pseudostems and were taller than control plants. DCPTA-treated H. caribaea produced more pseudostems per plant than control plants during their first year, but differences in the number of pseudostems and inflorescences during subsequent years were not significant. Chemical name used: 2-(3,4-dichlorophenoxy)triethylamine (DCPTA).
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