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| Web URL(s): | http://www.newss.org/proceedings/proceedings_2008.pdf#page=122
Last checked: 07/16/2013
Requires: PDF Reader
Notes: Item is within a single large file |
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| Publication Type:
| Report |
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| Author(s): | Askew, S. D. |
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| Author Affiliation: | Virginia Tech, Blacksburg |
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| Title: | Use of plant growth regulators on sports turf |
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| Section: | Symposium: The latest in plant growth regulators for turfgrass use
Other records with the "Symposium: The latest in plant growth regulators for turfgrass use" Section
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| Meeting Info.: | Philadelphia, Pennsylvania: January 7-10, 2008 |
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| Source: | Proceedings of the Sixty-Second Annual Meeting of the Northeastern Weed Science Society. Vol. 62, 2008, p. 104. |
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| Publishing Information: | Baltimore, Maryland: Northeastern Weed Science Society |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Cynodon dactylon; Cynodon dactylon x Cynodon transvaalensis; Ethephon; Mefluidide; Paclobutrazol; Plant growth regulators; Scalping; Sports turf management; Trinexapac-ethyl
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| Cultivar Names: | Tifway; Patriot |
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| Abstract/Contents: | "The science of sports turf management continues to evolve. Plant growth regulators (PGRs) have been an important part of that evolution in the past 10 years. There are several ways in which plant growth regulators are used on sports fields with most uses aimed at reduction of clippings and reducing scalping. Trinexapac ethyl is the most common product in use but flurprimidol, paclobutrazol, ethephon, and mefluidide all have varying uses on different types of fields. Benefits of PGRs in athletic fields include reduced scalping, less equipment wear, fewer clippings on the field, faster mowing time, increased turfgrass density, improved stress tolerance, improved turfgrass color, pre-stress conditioning, and improved establishment of over-seeded grasses. Use of PGRs is more common on bermudagrass fields than on cool-season fields. With dense bermudagrass types, such as Tifway or Patriot, bermudagrass scalping is an issue any time mowing is delayed and especially in the fall when bermudagrass morphology changes due to changes in light quality and the peak in bermudagrass density is reached. Patriot bermudagrass has been widely adopted in Virginia and other states in the northern transition zone due to cold tolerance, aggressive growth and density. Because of Patriots aggressive growth habit, PGRs are becoming an important tool in managing this bermudagrass cultivar. Scalping is one of the most important issues with Patriot bermudagrass. Scalping issues increase with decreasing mowing height, increasing fertility applications, and irregular mowing frequency. PGRs such as trinexapac ethyl can reduce scalping but will not eliminate the problem. Athletic field managers in Virginia are finding that an "attitude adjustment" is in order to manage scalping of Patriot bermudagrass in the fall. The angle of a reel mowers bed knife to the ground is called the "attitude". As the angle is increased the attitude becomes more "aggressive" and as the angle is decreased the attitude becomes more "flat". For putting green management, flat attitude is discouraged because it can cause streaks as the bedknife rubs the turf. At taller heights of cut, such as 1 to 2 cm, a flat attitude will not pose problems like it does on putting greens. Patriot bermudagrass becomes so dense in late summer that the bulk of its canopy is stolons capped with only a thin layer of leaves. Thus, routine PGR use, regular mowing, decreased fertility, and flat attitude are the best combination to combat scalping. When a PGR program is discontinued, turfgrass growth increases much beyond that of turfgrass that was not on a PGR program. Field mangers will use this phenomenon to advantage by discontinuing a PGR program briefly in conjunction with stressful events such as concerts or increased field use. PGRs are also useful to reduce growth of existing turfgrass when establishing an over-seeded species. PGR rates may be doubled and applied 1 to 7 days prior to over-seeding. Trinexapac ethyl is the best product for this use because it does not affect germination or emergence of seeded grasses. Ethephon, mefluidide, and paclobutrazol continue to be important PGRs in situations where cool-season fields are infested with annual bluegrass and seedhead production in spring reduces field quality during the sporting event." |
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| Language: | English |
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| References: | 0 |
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| Note: | This item is an abstract only! |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Askew, S. D. 2008. Use of plant growth regulators on sports turf. Proc. Annu. Meet. Northeast. Weed Sci. Soc. 62:p. 104. |
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| Web URL(s):
http://www.newss.org/proceedings/proceedings_2008.pdf#page=122
Last checked: 07/16/2013
Requires: PDF Reader
Notes: Item is within a single large file |
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MSU catalog number: SB 610 .N62 |
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