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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Scroggins, T. B.;
Martin, D. L.;
Murray, D. S.;
Bell, G. E.;
Gray, C. J. |
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| Author Affiliation: | Oklahoma State University, Stillwater, OK |
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| Title: | Response of OKS 91-11 bermudagrass to varying rates of Primo liquid (trinexapac-ethyl) |
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| Section: | Section II: Weed management in turf, pasture, and rangeland
Other records with the "Section II: Weed management in turf, pasture, and rangeland" Section
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| Meeting Info.: | 54th Annual Meeting, Biloxi, Mississippi: January 22-24, 2001 |
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| Source: | Southern Weed Science Society Proceedings. Vol. 54, 2001, p. 62. |
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| Publishing Information: | Champaign, IL: Southern Weed Science Society. |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Cynodon; Trinexapac-ethyl; Application rates; Growth regulators; Golf courses; Golf fairways; Lawn turf; Visual evaluation; Phytotoxicity; Shoot growth; Mowing height; Color; Clipping weight
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| Cultivar Names: | OKS 91-11 |
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| Trade Names: | Primo Maxx; Primo |
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| Abstract/Contents: | "Plant growth regulators (PGRs) have become an important component of many turf management programs. They reduce mowing frequency and maintenance cost. For PGRs to be effective, they must reduce the shoot growth without causing an unacceptable level of injury to the plant. Field experiments conducted in 1999 and 2000 at the Oklahoma State University Turf Research Center near Stillwater, OK evaluated the response of OKS 91-11, a new seeded bermudagrass cultivar, to Primo Liquid (trinexapac ethyl). This research was a combination of two separate studies that included two different management practices on the OKS 91-11 bermudagrass cultivar. The first study was conducted on a golf course simulated fairway using a 1.3 cm mowing height and the second study was on a simulated lawn using a 3.8 cm mowing height. Two experiment areas were an established stand of OKS 91-11. The experimental design was a randomized complete block with three replications of treatment. Plot size was 1.4 x 3.0 m. The soil type was a sandy loam soil containing 2.2% organic matter and having a pH of 6.7. Primo Liquid treatments for each study were applied using an air pressurized bicycle sprayer on 12 July, 1999 and on 7 July, 2000. Treatments used in the fairway simulated study were: untreated check, 0.05 kg ha-1, 0.10 kg ha-1, 0.15 kg ha-1, and 0.20 kg ha-1 with 0.10 kg ha-1 being the labeled rate. Treatments used in the lawn simulated study were: untreated check, 0.1 kg ha-1, 0.2 kg ha-1, 0.3 kg ha-1, 0.4 kg ha-1, and 0.5 kg ha-1 with 0.3 kg ha-1 being the labeled rate of Primo. Plots were visually rated for color, quality, and phytotoxicity on a weekly basis for 8 week after treatment (WAT). Shoot counts were taken on a bi-weekly basis. Clippings were collected weekly for 8 WAT and measured for wet and dry mass as well as a wet mass volume. A walk behind reel mower with catcher was used to collect the clippings that were taken from the middle of each plot in an area 0.5 m wide by 3.0 m long. Turf visual quality initially decreased at the labeled rate and higher rates in both years of each study. Treatments showed little difference in quality after 3 WAT. Turf in each study showed phytotoxicity effects due to the application of Primo Liquid. Phytotoxicity was observed more often on the lawn-simulated study than on the fairway-simulated study, and the higher the rate applied, the more phytotoxicity seen. The clipping weight reduction effect was highly significant during both years and on both studies, when the labeled rate and higher rates of Primo Liquid were applied. When comparing the labeled rate to the higher rates applied, a[n] even lower reduction in clipping weight was ot seen. In the lawn-simulated study, clipping yields were reduced for a longer time than in the fairway-simulated study. This was likely due to higher use rates in the lawn-simulated study. Results of this research suggest that close attention must be paid when selecting a use rate for Primo Liquid, and that the user must closely consider the individual cultivar within species as well as the turf cutting height when deciding upon the use rate. Addition[al] use rate research is needed on a number of new bermudagrasses that have recently entered the market place. Finally, it is important to note that a new formulation of (trinexapac-ethyl), Primo Maxx, was released in 2000. Research is needed to determine bermudagrass cultivar sensitivity to this new formulation." |
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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):
Scroggins, T. B., D. L. Martin, D. S. Murray, G. E. Bell, and C. J. Gray. 2001. Response of OKS 91-11 bermudagrass to varying rates of Primo liquid (trinexapac-ethyl). South. Weed Sci. Soc. Proc. 54:p. 62. |
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MSU catalog number: SB 611 .S6 v.54 |
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