Full TGIF Record # 65349
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Web URL(s):http://www.newss.org/proceedings/proceedings_2000_vol54.pdf#page=101
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Publication Type:
i
Report
Author(s):Fagerness, M. J.; Yelverton, F. H.
Author Affiliation:Fagerness: Research Assistant, Crop Science Department, North Carolina State University, Raleigh, NC; Yelverton: Associate Professor, Crop Science Department, North Carolina State University, Raleigh, NC
Title:Lateral development of plant growth regulator treated 'Tifway' bermudagrass
Section:Turfgrass and plant growth regulators
Other records with the "Turfgrass and plant growth regulators" Section
Meeting Info.:Baltimore, MD: January 3-6, 2000
Source:Proceedings of the 54th Annual Meeting of the Northeastern Weed Science Society. Vol. 54, 2000, p. 101.
Publishing Information:College Park, MD: Northeastern Weed Science Society
# of Pages:1
Keywords:TIC Keywords: Mode of action; Lateral growth; Growth regulators; Cynodon dactylon; Cynodon transvaalensis; Trinexapac-ethyl; Paclobutrazol; Application rates; Shoot growth; Shoot density
Cultivar Names:Tifway
Abstract/Contents:"The ability of plant growth regulators (PGRs), such as trinexepac-ethyl (TE) and paclobutrazol (PB), to suppress shoot biomass production and enhance shoot density in 'Tifway' bermudagrass [Cynodon dactylon (L.) Pers. x Cynodon transvaalensis (Burtt-Davy)] has been documented. However, determination on how PGRs affect lateral development of this species remains a necessity for complete understanding of how they affect growth and development. Research was conducted in a greenhouse over two years to investigate how various application patterns of either TE or PB affect both basic growth and lateral development patterns in established 'Tifway' bermudagrass. 10-cm sod cores were established in 23-cm pots and were maintained at a 1.9 cm cutting height. All pots were subirrigated and were fertilized at 49 kg N/ha/month. Trinexepac-ethyl and PB were applied once, twice, or three times during the experiment at 0.11 and 0.56 kg a.i./ha respectively. Both TE and PB inhibited shoot biomass production. Paclobutrazol, especially when applied two or three times, had the greatest effect on this measured parameter. Post inhibition growth enhancement (PIGE) was evidenced for both PGRs and was more pronounced when sequential applications were minimized. Shoot density was enhanced by either PGR. However, the duration of such enhancements by TE was dependent upon sequential applications, while this dependency did not exist for PB. Stolon length was unaffected by TE in either year of the experiment. PB significantly reduced stolon length in both years; this suppressive effect was dependent upon sequential applications in 1998 but not in 1999. PB was the only PGR that affected stolon numbers emerging from the sod core. However, this effect, characterized by reductions in stolon number, was dependent on sequential applications of PB. Three applications of PB resulted in a two-fold increase in overall sod core areas in 1998 while maximum such increases with TE were 30-40%. The three-application regime with PB did not produce the same effects in 1999. However, core are was maximized in 1999 in pots treated with one or two applications of PB. The stronger suppressive effect of PB on 'Tifway' bermudagrass growth did not relate to decreased core area in this experiment. It is believed that strong suppression of stolon length with PB results in more rapid incorporation of these tissues into the perceived canopy. The absence of TE effects on stolon length affected the overall outward development of TE treated cores. However, enhancements of measurable shoot density may hae accounted for slight increases in TE treated cores. Results suggest that PGRs may help facilitate 'Tifway' bermudagrass establishment. However, the suppressive and persistent effects of PB may necessitate higher sprig planting densities to maximize the utility of this PGR."
Language:English
References:0
See Also:Other items relating to: P G Rs 1997-2006
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Fagerness, M. J., and F. H. Yelverton. 2000. Lateral development of plant growth regulator treated 'Tifway' bermudagrass. Proc. Annu. Meet. Northeast. Weed Sci. Soc. 54:p. 101.
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Web URL(s):
http://www.newss.org/proceedings/proceedings_2000_vol54.pdf#page=101
    Last checked: 07/24/2013
    Requires: PDF Reader
    Notes: Item is within a single large file
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MSU catalog number: SB 610 .N62 v. 54
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