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| Web URL(s): | http://www.newss.org/proceedings/proceedings_1993_vol47.pdf#page=108
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| Publication Type:
| Report |
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| Author(s): | Gover Arthur E.;
Watschke, Thomas L.;
Batey, David A. |
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| Author Affiliation: | Gover: Project Associate; Watschke: Professor of Turfgrass Science;and Batey: Research Aide, The Pennsylvania State University, University Park, PA |
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| Title: | Evaluation of trinexapac-ethyl in combination with several plant growth regulators applied to tall fescue |
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| Section: | Turfgrass and plant growth regulators - Wednesday January 6
Other records with the "Turfgrass and plant growth regulators - Wednesday January 6" Section
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| Meeting Info.: | Baltimore, MD: January 4-7, 1993 |
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| Source: | Proceedings of the 47th Annual Meeting of the Northeastern Weed Science Society. Vol. 47, 1993, p. 108-109. |
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| Publishing Information: | Ithaca, NY: Northeastern Weed Science Society |
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| # of Pages: | 2 |
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| Keywords: | TIC Keywords: Trinexapac-ethyl; Growth regulators; Tank mix; Comparisons; Festuca arundinacea; Combination treatments; Application rates; Mefluidide; Imazethapyr; Imazapyr; Chlorsulfuron; Metsulfuron methyl; Height; Seedheads; Density; Clipping weight; Dry weight; Growth
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| Cultivar Names: | Cimmaron; Bonanza; Olympia |
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| Abstract/Contents: | "As part of a cooperative research project with the Pennsylvania Department of Transportation, a study evaluating the growth regulation of tall fescue (Festuca arundinacea Schreb.) with trinexapac-ethyl in combination with other plant growth regulators was established May 1, 1992, at the Landscape Management Research Center of the Pennsylvania State University. Trinexapac-ethyl at rates of 0, 0.125, and 0.25 lb ai/ac was applied alone and in combination with mefluidide at 0.125 lb ai/ac; a commercial premix of imazethapyr and imazapyr at 0.044 plus 0.0016 lb ai/ac, respectively; chlorsulfuron at 0.012 lb ai/ac; and metsulfuron methyl at 0.0094 lb ai/ac. These treatments were applied to a six year old stand of a blend of 'Cimmaron', 'Bonanza', and 'Olympia' turf-type tall fescues. The applications were made to 3 by 15 ft plots in a randomized complete block design with a factorial treatment arrangement and three replications, using a CO₂ powered, hand-held sprayer delivering 15.8 gal/ac at 20 psi using Spraying Systems 8002 flat fan spray tips. All plots except the untreated check were also treated with a commercial premix of 2,4-D, MCPP, and dicamba, at 1.0, 1.0, and 0.25 lb ae/ac, respectively, tank mixed with the growth regulator treatments. Vegetative canopy height was estimated at two locations in each plot on May 29, 28 days after treatment (DAT). Seedhead height and density were measured June 12, 42 DAT. Seedhead density was measured by counting the number of seedheads in a single 0.25 m² quadrat placed in each plot. Clipping yields were taken June 18 and July 27, 47 and 87 DAT, respectively, using a 20 in rotary mower set at 3 in. A clippings subsample was taken from each plot at the 47 DAT harvest, and weighed fresh and dry to determine dry matter content and dry weight clipping yield. The data were subjected to analysis of variance, and means separations performed using Fisher's Protected lsd test. There was no significant interaction between trinexapac-ethyl rate and plant growth regulator treatment for any dependent variable. Trinexapac-ethyl rate had a significant effect on vegetative canopy height, seedhead height, and dry weight yields (Table 1a). There was a significant decrease in vegetative canopy height and seedhead height with each increase in trinexapac-ethyl application rate. Dry weight clipping yields of turf treated with 0.25 lb ai/ac of trinexapac-ethyl were significantly lower than when treated with 0, or 0.125 lb ai/ac trinexapac-ethyl. Plant growth regulator treatment had a significant effect on all dependent variables (Table 1b). Treatments including a growth regulator in addition to trinexapac-ethyl provided a reduction in vegetative canopy height, seedhead height, seedhead density, and clipping yields and dry matter content 47 DAT; and a significant increase in clipping yields 87 DAT, compared to treatments with no additional growth regulator. There were no turf color differences observed during the course of the study. The addition of trinexapac-ethyl at increasing rates did increase the inhibition of turf growth without causing phytotoxicity, but the application rates used in this study were not sufficient to provide the degree of inhibition, particularly of seedhead production, that would be considered satisfactory. Furture investigations of combination treatments should include increased application rates of the treatment components." |
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| Language: | English |
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| References: | 0 |
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| Note: | Tables |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Gover A. E., T. L. Watschke, and D. A. Batey. 1993. Evaluation of trinexapac-ethyl in combination with several plant growth regulators applied to tall fescue. Proc. Annu. Meet. Northeast. Weed Sci. Soc. 47:p. 108-109. |
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http://www.newss.org/proceedings/proceedings_1993_vol47.pdf#page=108
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Notes: Item is within a single large file |
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MSU catalog number: SB 610 .N62 v. 53 |
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