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Brian A. Krug, Brian E. Whipker, and Ingram McCall

paclobutrazol or uniconazole at a concentration of 5 mg·L −1 on de-eyed tubers were shown to retard overall foliage height ( Wilfret, 1993 ). Flurprimidol (Topflor; SePRO Corp., Carmel, Ind.) has been available in Europe for more than 20 years as a 1

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William B. Miller

of the soaking solution affected the efficacy of flurprimidol corm soaks. When performing 30- to 60-min soaks, room temperature or warmer solutions (17 to 32 °C) were more effective than cold (7 °C) solutions. Flurprimidol at 54 mg·L −1 and 77 mg

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William B. Miller

solution may be used to dip numerous bulbs without loss of efficacy. For example, at least 55 lily bulbs can be dipped into 1 L of paclobutazol or uniconazole ( Ranwala et al., 2005 ) and 100 hyacinth bulbs can be dipped into 1 L of flurprimidol ( Krug et

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Jared Barnes, Brian Whipker, Wayne Buhler, and Ingram McCall

( Whipker and Evans, 2012 ). Flurprimidol is a PGR that is used to control plant height and can be applied as a foliar spray, substrate drench, or preplant bulb soak ( Krug et al., 2005 ). It functions by inhibiting the catalyst that converts ent -kaurene

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Hunter C. Smith, Jason A. Ferrell, and Tyler J. Koschnick

with GA inhibitors on large landscaping species ( Keever and Gilliam, 1994 ). Flurprimidol (0.33%) [alpha-(1-methylethyl)-alpha-(4-(trifluoromethoxyphenyl)-5-pyrimidine-menthanol] is a PGR commercially available for use in landscaping, nurseries, and

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Shawn D. Lyons, William B. Miller, H. Christian Wien, and Neil S. Mattson

unlikely to result in sufficient height control overall. Anti-gibberellin PGRs are used to restrict stem elongation in a wide variety of floriculture crops. Flurprimidol and paclobutrazol reduce stem and scape elongation in tulip ( Tulipa gesneriana

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Timothy L. Grey, Mark Czarnota, Thomas Potter, and B. Todd Bunnell

Flurprimidol [alpha-(1-methylethyl)-alpha-(4-(trifluoromethoxyphenyl)-5-pyrimidinemethanol] is a commercially available Type II plant growth regulator (PGR) ( Rademacher, 2000 ) registered for use on golf course turf, coniferous and deciduous trees

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Christopher J. Currey, Roberto G. Lopez, Brian A. Krug, Ingram McCall, and Brian E. Whipker

; Sanderson et al., 1975 ; Wilfret, 1987 ; Wilfret and Reiser, 1996 ). Flurprimidol (Topflor; SePRO Corp., Carmel, IN) is available in the U.S. market as a 0.38% liquid formulation. In addition to ancymidol, paclobutrazol, and uniconazole, flurprimidol

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Amy Barker, Ingram McCall, and Brian E. Whipker

significant differences. No other research studies are reported on the effects of PGRs on plumbago. Two additional PGRs applied as a drench have shown potential for successful growth control: flurprimidol and ethephon. Flurprimidol has been widely used in

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Amir Rezazadeh, Richard L. Harkess, and Guihong Bi

and concentration for consistent results. Several PGRs effectively inhibit stem elongation of ornamental plants and influence the time of flowering. The triazole class of PGRs, including flurprimidol, uniconazole, and paclobutrazol, are one of the