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| Web URL(s): | http://www.newss.org/proceedings/proceedings_1999_vol53.pdf#page=58
Last checked: 07/24/2013
Requires: PDF Reader
Notes: Item is within a single large file |
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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Fagerness, Matthew J.;
Yelverton, Fred H. |
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| Author Affiliation: | Fagerness: Research Assistant; and Yelverton: Associate Professor, Crop Science Department, North Carolina State University, Raliegh, NC |
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| Title: | Divot recovery of 'Tifway' bermudagrass treated with trinexapac-ethyl and paclobutrazol |
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| Meeting Info.: | Cambridge, MA: January 4-7, 1999 |
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| Source: | Proceedings of the 53rd Annual Meeting of the Northeastern Weed Science Society. Vol. 53, 1999, p. 58. |
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| Publishing Information: | College Park, MD: Northeastern Weed Science Society |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Divots; Divot recovery; Cynodon dactylon; Cynodon transvaalensis; Trinexapac-ethyl; Paclobutrazol; Suppression; Turf recovery; Growth regulators; Growth; Lateral growth; Golf fairways; Quality; Shoot growth
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| Cultivar Names: | Tifway |
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| Abstract/Contents: | "Trinexapac-ethyl (TE) and paclobutrazol (PB) are two plant growth regulators, which can effectively suppress vertical shoot growth in many turfgrass species. Both inhibit biosynthesis of gibberellic acid (GA) but TE is foliar absorbed with only a 2-day half-life in soil while PB is root absorbed and has a 200-day half-life in the soil. Both growth regulators can effectively suppress shoot growth for 4-6 weeks after application. Concerns with use of either plant growth regulator often focus on their impact on lateral development of affected turfgrass species. 'Tifway' bermudagrass [Cynodon dactylon (L.) Pers. x Cynodon transvaalensis (Burtt-Davy)] is frequently found on golf course fairways and tees in transition zone or southern regions of the United States. Because divots are a common form of mechanical disturbance in either fairways or tees, the effects of TE and PB on recovery rates for divots made in 'Tifway' bermudagrass are a relevant concern for many golf course superintendents. An experiment was conducted in the summer of 1998 to evaluate the effects of TE and PB on patterns of divot recovery in established 'Tifway' bermudagrass maintained under golf course fairway conditions. Applications of TE and PB were made once, twice, or three times during summer at label recommended rates (0.11 kg a.i./ha and 0.56 kg a.i./ha, respectively). Divots were made biweekly throughout the summer, using a custom-build divot maker, to evaluate effects of TE and PB on divot recovery both during and after periods of growth suppression. Assessment of divot recovery was conducted on a biweekly basis and constituted measurements of percent grow-in using a counting grid and shoot counts for shoots originating from rhizome nodes. Turfgrass quality was assessed biweekly as a standard measurement to ensure TE and PB were affecting growth as would be expected. Divot recovery in nontreated turf required 4-6 weeks, with maximum recovery occurring between two and four weeks after divots were made. Results showed little, if any, detrimental effect of TE on recovery rates of divots during the period of growth inhibition. However, results also suggested that divot recovery may be enhanced during periods following growth inhibition when growth resurgence in 'Tifway' bermudagrass is not uncommon PB showed the tendency to delay recovery of divots, especially in turf where PB was continuously applied. The emergence of shoots from rhizome nodes was also reduced in PB-treated divots, suggesting that PB activity in soil may affect rhizome development in 'Tifway' bermudagrass." |
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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):
Fagerness, M. J., and F. H. Yelverton. 1999. Divot recovery of 'Tifway' bermudagrass treated with trinexapac-ethyl and paclobutrazol. Proc. Annu. Meet. Northeast. Weed Sci. Soc. 53:p. 58. |
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| Web URL(s):
http://www.newss.org/proceedings/proceedings_1999_vol53.pdf#page=58
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. 53 |
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