Cutless and Atrimmec for Controlling Growth of Woody Landscape Plants in Containers

Banko, Thomas J.; Stefani, Marcia A.

doi:10.24266/0738-2898-13.1.22

Cited by 6 publications

(4 citation statements)

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“…Thus, it is possible, its application to facilitate the combination of biotechnological and conventional propagation methods, as it takes place in the case of strawberry. For 'Bluecrop' and 'Darrow' cultivars, dikegulac limited shoot elongation, which is a wellknown impact of growth retardants on ericaceous ornamentals [Banko and Stefani 1995, Marosz and Matysiak 2005, Litwińczuk and Prokop 2010. To a certain extent, it might be considered positively as it facilitates nursing more plants at a smaller area.…”

Section: Discussionmentioning

confidence: 99%

The impact of foliar dikegulac and Asahi SL sprays on the shoot production of highbush blueberry nursery plants

Litwińczuk

2023

asphc

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The aim of the present study was to assess the usefulness of dikegulac (2,3:4,6-di-O-isopropylidene-α-Lxylo-2-hexulofuranosonic acid) and Asahi SL (sodium ortho- and para-nitrophenolate, sodium 5-nitroguaiacolate) in production of highbush blueberry nursery plants. The experiment was carried out on three cultivars of highbush blueberry: ‘Bluecrop’, ‘Brigitta blue’ and ‘Darrow’. Pot plants were treated two times with dikegulac (0.1%) or/and Asahi SL (0.2%) foliar sprays in the late spring. The reaction of blueberry clones to the tested chemicals was different. Dikegulac-treated plants developed significantly more shoots making them a good and efficient source of cuttings when using the traditional propagation. Dikegulac limited the shoot elongation of two studied cultivars (‘Bluecrop’, ‘Darrow’). It also reduced the size of leaf blades but generally did not change the fluorescence and the relative content of chlorophyll. The influence of dikegulac in the applied dose was much stronger than the impact of nitrophenolates. The application of Asahi SL, alone or together with dikegulac, did not give any spectacular and advantageous effects.

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Section: Discussionmentioning

confidence: 99%

The impact of foliar dikegulac and Asahi SL sprays on the shoot production of highbush blueberry nursery plants

Litwińczuk

2023

asphc

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“…Dikegulac sodium is a plant growth regulator (PGR) that chemically prevents apical dominance by inhibiting cell division in the apical meristem, thereby allowing lateral branching to occur (Arzee et al, 1977;Rezazadeh et al, 2015). Dikegulac sodium has been shown to effectively increase branching of several horticultural crops such as Sedum, Hydrangea, Phlox, and Nepeta (Banko and Stefani, 1995;Cline, 1978;Grossman et al, 2013;Sun et al, 2015). Within 1 d, dikegulac sodium was detected in the apical meristem after being applied to the basal foliage of Chrysanthemum morifolium.…”

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confidence: 99%

Concentration and Timing of Dikegulac Sodium on Helianthus hybrida ‘Sunfinity’ Seedlings for Potted Plant Production

Marshall

Starman

Pemberton³

et al. 2022

horts

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Sunflower ‘Sunfinity’ (Helianthus hybrida) can be produced as a potted plant if apical dominance is removed with a manual pinch to control plant height and promote branching and flower number. Chemical pinching agents such as dikegulac sodium could prove to be valuable tools to reduce the labor and costs associated with manual pinching. Our objective was to determine the time of seedling growth and concentration of dikegulac sodium foliar spray application that would result in morphology similar to manually pinched plants. Dikegulac sodium was applied to sunflower ‘Sunfinity’ seedlings at one of four concentrations increasing from 200 to 500 mg⋅L−1 at the time of growth when the first, second, or third node (N1, N2, or N3) was the apical node and axillary stems at those nodes were undeveloped. Applications of 400 mg⋅L−1 at N3 and 500 mg·L−1 at N2 removed apical dominance because of total senescence of the apical meristem and produced a well-branched plant similar to that subjected to manual pinching. Apical dominance was temporarily inhibited without senescence of the apical meristem when 400 mg⋅L−1 was applied at N2 and when 500 mg⋅L−1 was applied at N3, which, nevertheless, resulted in branching that formed a well-rounded canopy.

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“…Plant growth regulators are synthetic compounds commonly used on ornamental, greenhouse species to produce a uniform and compact appearance (Banko and Stefani, 1995;Krug et al, 2005). Gibberellin [gibberellic acid (GA)] biosynthesis inhibition is the most common mechanism of action used today because it has the least potential for phytotoxicity (Graebe, 1987;Rademacher, 2000).…”

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confidence: 99%

“…Sold as a granule formulation (Cutless G; SePRO Corp., Carmel, IN), irrigation is required to facilitate the movement of flurprimidol into the root zone of the plant where it is absorbed and translocated through the xylem along with plant water uptake (Sterrett and Tworkoski, 1987). Several studies have shown that flurprimidol has performed as well or better when compared with other landscaping PGRs (Banko and Stefani, 1995;Keever and Gilliam, 1994;Krug et al, 2005;Norcini, 1991).…”

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confidence: 99%

Flurprimidol Performance on Ornamental Species in Relation to Trimming Time and Method of Application

Smith

Ferrell

Koschnick

2014

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The plant growth regulator flurprimidol (Cutless G) is registered for use on ornamental plants to reduce internode elongation and reduce trimming frequency. It has been hypothesized that timing of the trimming event can be related to the efficacy of the flurprimidol treatment. Granular flurprimidol was applied to well-established plants at a standard rate of 22.5 g/a.i. (15 lbs product)/1000 ft2 on 23 Apr. 2012 and 1 May 2013.Two common Florida landscaping species, Viburnum odoratissimum and V. suspensum, were selected to be trimmed at different times to investigate flurprimidol efficacy by measuring plant regrowth, biomass, and visual appearance. The five trimming treatments occurred at 7 days before (flurprimidol) application (DBA), 0 DBA, 7 days after application (DAA), 14 DAA, and 21 DAA. No significant differences were observed in trimming times for flurprimidol-treated V. odoratissimum or V. suspensum. V. odoratissimum shoot regrowth was significantly reduced in flurprimidol-treated plants compared with the untreated control (UTC). The insufficient growth regulation observed in both Viburnum species is likely the result of species tolerance. Two flurprimidol application methods, granular and drench, were evaluated against an UTC on two landscaping species, Elaeagnus pungens and Loropetalum chinense. This experiment was to determine if a granular or drench application would influence the performance of flurprimidol. Shoot growth of E. pungens was reduced 4.3% and 13.9% by the granular and drench applications, respectively, but was not significantly different from one another or the UTC. The granular application reduced biomass (25.1%) but was not significantly different from the drench (16.9%). L. chinense shoot regrowth was decreased 39.5% and 38.2% by the granular and drench treatments, respectively. Plant biomass was significantly reduced in both treatments compared with the UTC (17.0% by granular and 13.9% by drench), but the biomass and visual assessments between the application methods were not significantly different. Species sensitivity was found to have a substantial influence on the efficacy of a flurprimidol application.

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Cutless and Atrimmec for Controlling Growth of Woody Landscape Plants in Containers

Cited by 6 publications

References 0 publications

The impact of foliar dikegulac and Asahi SL sprays on the shoot production of highbush blueberry nursery plants

The impact of foliar dikegulac and Asahi SL sprays on the shoot production of highbush blueberry nursery plants

Concentration and Timing of Dikegulac Sodium on Helianthus hybrida ‘Sunfinity’ Seedlings for Potted Plant Production

Flurprimidol Performance on Ornamental Species in Relation to Trimming Time and Method of Application

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