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| Web URL(s): | http://www.swss.ws/wp-content/uploads/docs/2004%20Proceedings-SWSS.pdf#page=224
Last checked: 07/17/2013
Requires: PDF Reader
Notes: Item is within a single large file |
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| Publication Type:
| Report |
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| Author(s): | Bunnell, B. T.;
McCarty, L. B. |
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| Author Affiliation: | Department of Horticulture, Clemson University, Clemson, SC |
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| Title: | Tifway bermudagrass growth regulation using Primo and Cutless |
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| Section: | Weed management in turf crops
Other records with the "Weed management in turf crops" Section
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| Meeting Info.: | Memphis, Tennessee: January 26-28, 2004 |
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| Source: | Proceedings: Southern Weed Science Society: 57th Annual Meeting. Vol. 57, 2004, p. 126. |
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| Publishing Information: | Champaign, Illinois: Southern Weed Science Society |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Chemical injury; Clipping weight; Cynodon dactylon x Cynodon transvaalensis; Flurprimidol; Growth regulator evaluation; Horizontal growth; Plant growth regulators; Trinexapac-ethyl
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| Cultivar Names: | Tifway |
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| Trade Names: | Primo; Cutless |
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| Abstract/Contents: | "Plant growth regulators (PGRs) are frequently used in highly maintained turfgrass situations such as golf courses and athletic fields to reduce vegetative growth and suppress seedheads. Other advantages of PGRs include reduced scalping, increased turf density, and improved turf color. The objective of this study was to evaluate two commercially available PGRs on clipping weights, horizontal regrowth, and injury of Tifway bermudagrass. The study was performed for 12 wks from 16 June to 8 September, 2003 on Clemson University's registered Tifway bermudagrass [Cynodon dactylon (L.) Pers. x C. traansvaalensis Burtt-Davy] research plot. The study evaluated tank mix combinations including three rates of Primo Maxx 1 EC (trinexapac-ethyl) and Cutless (flurprimidol). Primo rates were 0, 6.0, and 12.0 oz A-1 (0, 0.052, and 0.105 kg ai ha-1). Cutless rates were 0, 4.0, and 8.0 oz A-1 (0, 0.14, and 0.28 kg ai ha-1). Tank mixes included all combinations of 3 rates of Primo and Cutless, resulting in 9 treatments. Tank mix applications were made every 3 weeks throughout the study duration. Clipping were harvested at 4, 8, and 12 weeks after initial treatment (WAIT) with a walk mowing set to a 16 mm height. Clipping weights were compared to the untreated plot to calculate percent clipping reduction. Percent horizontal regrowth was measured biweekly and averaged over the entire study. Visual ratings for Tifway bermudagrass injury were taken weekly. Injury was rated on a 0-100% scale with 30=maximum level of acceptable injury. At 4 WAIT, clippings were reduced 81 to 95% with Primo at 12 oz A-1 plus all rates of Cutless and Primo at 6 oz A-1 plus Cutless at 4 and 8 oz A-1. Tank mix applications containing Primo at 6 oz A-1 plus Cutless at 0 oz A-1 and Primo at 0 oz A-1 plus Cutless at 8 oz A-1 reduced clippings approximately 50%. At 8 WAIT, only tank mixes containing Primo at 12 oz A-1 significantly reduced clippings compared plots receiving no PGR applications. Primo at 12 oz A-1 plus Cutless at 0 or 4 oz A-1 reduced clippings by 75%. A 94% clipping reduction followed the tank mix containing the high rate of Primo and Cutless. At 12 WAIT, the tank mix of Primo at 12 oz A-1 plus Cutless at 8 oz A-1 reduced clippings by 50%. Other tank mix combinations containing Primo at 6 or 12 oz A-1 plus Cutless, although not significant, reduced clippings 25 to 40%. The 4, 8, and 12 WAIT ratings were pooled to achieve a cumulative Tifway bermudagrass clipping regulation. Clipping weights were reduced 46 to 70% with all tank mixes containing either Primo at 12 oz A-1 or Primo at 6 oz A-1 plus Cutless at 4 and 8 oz A-1. Percent horizontal regrowth was reduced by PGR applications. Horizontal regrowth was reduced approximately 15% following Primo at 6 oz A-1 plus Cutless at 4 or 8 oz A-1 and all tank mixes containing Primo at 12 oz A-1. Cutless at 4 and 8 oz A-1 plus Primo at 0 oz A-1 did not reduce horizontal regrowth. Acceptable Tifway bermudagrass injury occurred at 1 and 2 WAIT with all tank mixes. Greatest injury of 25% at 2 WAIT followed the tank mix combination of Primo at 12 oz A-1 plus Cutless at 8 oz A-1. All plots full recovered by 3 WAIT. In summary, greatest clipping reduction and Tifway bermudagrass injury followed the tank mix containing the high rates of Primo and Cutless at all rating dates. All tank mixes containing Primo reduced horizontal regrowth except Primo at 6 oz A-1 plus no Cutless. Cutless alone did not reduce horizontal regrowth. Future research should continue to evaluate different rates and frequencies of these tank mixes. Additional work should investigate residual clipping reduction using these products on various turfgrasses." |
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| Language: | English |
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| References: | 0 |
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| Note: | "The changing world of weed science"
This item is an abstract only! |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Bunnell, B. T., and L. B. McCarty. 2004. Tifway bermudagrass growth regulation using Primo and Cutless. South. Weed Sci. Soc. Proc. 57:p. 126. |
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| Web URL(s):
http://www.swss.ws/wp-content/uploads/docs/2004%20Proceedings-SWSS.pdf#page=224
Last checked: 07/17/2013
Requires: PDF Reader
Notes: Item is within a single large file |
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MSU catalog number: b2207931 |
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