Full TGIF Record # 225172
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Web URL(s):http://www.swss.ws/wp-content/uploads/docs/2005 Proceedings-SWSS.pdf#page=198
    Last checked: 07/18/2013
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i
Report
Author(s):Totten, F. W.; Bunnell, B. T.; McCarty, L. B.
Author Affiliation:Department of Horticulture, Clemson University, Clemson, SC
Title:'Tifway' bermudagrass response to Primo and Cutless
Section:Weed management in turfgrass
Other records with the "Weed management in turfgrass" Section
Meeting Info.:Charlotte, North Carolina: January 24-26, 2005
Source:Proceedings of the 58th Annual Meeting of the Southern Weed Science Society. Vol. 58, 2005, p. 123.
Publishing Information:Champaign, Illinois: Southern Weed Science Society
# of Pages:1
Keywords:TIC Keywords: Cynodon dactylon x Cynodon transvaalensis; Flurprimidol; Plant growth regulator combinations; Growth regulator evaluation; Tank mix; Trinexapac-ethyl
Cultivar Names:Tifway
Trade Names:Primo; Cutless
Abstract/Contents:"'Tifway' Bermudagrass (Cynodon dactylon x transvaalensis 'Tifway') is a popular turfgrass utilized on golf course fairways and athletic fields. Aggressive summer growth habit, fine leaf texture, and dark green color attribute to the popularity of 'Tifway'. In order to reduce mowing requirements, suppress seedheads, enhance color, and to sustain a uniform playing surface, plant growth regulators (PGRs) have been widely used on 'Tifway' bermudagrass. The study was performed for 12 weeks from 10 July to 4 October, 2004 on Clemson University's registered Tifway bermudagrass [Cynodon dactylon (L.) x C. transvalensis Burtt-Davy] research plot. The study evaluated Primo Maxx 1EC (trinexapac-ethyl) and Cutless 50W (flurprimidol) applied exclusively and as a tank mix at three rates. The rates for Primo were 0, 6, and 12 oz A-1 (0, 0.052, and 0.105 kg ai ha-1). The rates for Cutless were 0, 4, and 8 oz A-1 (0, 0.14, and 0.28 kg ai ha-1). Exclusive applications and tank mixes of Primo and Cutless resulted in nine treatments total. Applications were made every three weeks for the duration of the study. Clippings were harvested at 4, 8, and 12 weeks after initial treatment (WAIT) using a walk mower set to a 16mm height. Clipping weights for all Primo and Cutless treatments were compared to untreated plots to calculate percent clipping reductions. Percent horizontal regrowth was measured biweekly. Tifway bermudagrass injury was evaluated weekly. Injury was rated visually on a scale from 0-100% with 30=maximum level of acceptable injury. Statistical analysis showed that a Primo x Cutless interaction was not significant for clipping yield, percent lateral regrowth, or injury data. This implies that the two products were acting independently. At 8 WAIT, a linear decrease in clipping yield was observed as the rate of Primo and Cutless increased. Primo at 12 oz A-1 reduced clipping yield 49% 8 WAIT. Cutless at 4 oz A-1 and 8 oz A-1 reduced clipping yield by approximately 60% 8 WAIT. Acceptable injury to 'Tifway' bermudagrass was observed with all tank mixes. With Primo, a linear increase in injury was observed with increasing rate 1 and 2 WAIT. At both dates the greatest injury was observed with Primo at 12 oz A-1. Injury from Cutless increased linearly as rate increased 1 WAIT. Cutless at 4 oz A-1 and 8 oz A-1 produced the greatest amount of injury 1 WAIT. All plots had rebounded from injury 3 WAIT. Percent lateral regrowth was reduced by Cutless 2 WAIT. As rate of Cutless increased, a linear decrease in lateral regrowth of 'Tifway' bermudagrass was observed. Reductions were 13% for Cutless at 4 oz A-1 and 26% for Cutless at 8 oz A-1. In summary, acceptable visible injury was recorded 1 and 2 WAIT, and the greatest clipping reduction was recorded 8 WAIT on 'Tifway' bermudagrass. In both cases, the highest recorded values were for the high rates of both Primo and Cutless. Percent lateral regrowth was reduced by Cutless 2 WAIT, as the high rate of 8 oz A-1 yielded the greatest reduction. Future research should continue evaluating new rates and application timings for Primo/Cutless tank mixes. Also, the residual activity of these tank mixes should be further explored."
Language:English
References:0
Note:"The changing world of weed science"
This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Totten, F. W., B. T. Bunnell, and L. B. McCarty. 2005. 'Tifway' bermudagrass response to Primo and Cutless. South. Weed Sci. Soc. Proc. 58:p. 123.
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http://www.swss.ws/wp-content/uploads/docs/2005 Proceedings-SWSS.pdf#page=198
    Last checked: 07/18/2013
    Requires: PDF Reader
    Notes: Item is within a single large file
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