Ethephon influences flowering, height, and branching of several herbaceous perennials

摘要: Abstract Effects of ethephon (2-chloroethylphosphonic acid) were determined on flowering, plant height, and branching Achillea millefolium L. ‘Weser River Sandstone’, Coreopsis verticillata ‘Moonbeam’, Echinacea purpurea Moench ‘Bravado’, Leucanthemum × superbum Bergmans ex. J. Ingram ‘Thomas Killen’, Liatris spicata Willd. ‘Kobold’, Monarda didyma ‘Blue Stocking’, Phlox paniculata ‘Mt. Fuji’, Physostegia virginiana Bentham ‘Summer Snow’. Spraying three times at 1000 mg l−1 (6.92 mM) delayed the flowering Echinacea, Monarda, by 6, 7 9 days, respectively. Ethephon reduced height 23, 42, 46, 40, or 46% when applied Achillea, Leucanthemum, Physostegia, respectively, compared to that control plants anthesis. inflorescence shoot count per pot varied among species. The number inflorescences was increased application (36%), (52%), (25%), but decreased in (33%), Leucanthemum (21%), (62%), (24%). Treatment with caused necrosis foliage. Inflorescence diameter increasing dosage.