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Web URL(s): | http://www.swss.ws/wp-content/uploads/docs/2006 Proceedings-SWSS.pdf#page=185 Last checked: 07/18/2013 Requires: PDF Reader Notes: Item is within a single large file |
Publication Type:
| Report |
Author(s): | Taverner, D.;
Strahan, R. E.;
Lee, D. J. |
Author Affiliation: | LSU AgCenter, Baton Rouge, LA |
Title: | Tolerance of Palmetto® St. Augustinegrass and common centipedegrass to several postemergenc [postemergence] herbicides |
Section: | Weed management in turf grass Other records with the "Weed management in turf grass" Section
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Meeting Info.: | San Antonio, Texas: January 23-25, 2006 |
Source: | Proceedings: Southern Weed Science Society 59th Annual Meeting. Vol. 59, 2006, p. 112. |
Publishing Information: | Champaign, Illinois: Southern Weed Science Society |
# of Pages: | 1 |
Keywords: | TIC Keywords: Eremochloa ophiuroides; Herbicide evaluation; Herbicide resistance; Postemergence herbicides; Stenotaphrum secundatum
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Cultivar Names: | Palmetto |
Abstract/Contents: | "Several new herbicides have been registered for use in turfgrass that inhibit acetolactate synthase (ALS). Sulfonylurea and sulfonamide families inhibit the ALS enzyme, preventing the production of three essential amino acids which result in stunting and slow death in susceptible plants. Most of these herbicides are registered or will be registered for use on bermudagrass. However, in the Gulf Coast region of the United States many residential and commercial turfgrass areas utilize St. Augustinegrass and centipedegrass. Herbicides are often applied to manage weed problems and maintain turf quality. The low toxicity and low use rates of ALS inhibiting herbicides make them ideal for use in areas with excessive human traffic. This experiment was conducted to determine the tolerance of several new ALS inhibiting herbicides to common centipedegrass and Palmetto® St. Augustinegrass. The herbicides were compared to standard postemergence herbicides commonly utilized on those grasses. Two studies were conducted at the Burden Research Center in Baton Rouge in 2005 to determine St. Augustinegrass and centipedegrass tolerance to several new ALS inhibiting herbicides. Established Palmetto® St. Augustinegrass and common centipedegrass were fertilized and mowed according to standard accepted practices. Irrigation was applied as needed to prevent stress. The studies were initiated on August 5. In the centipedegrass trial, sethoxydim and clethodim standards were applied in 14 day intervals. In the St. Augustinegrass trial, asulam was applied in 21 day intervals. For both studies, flazasulfuron, bispyribac, sulfosulfuron, and trifloxysulfuron were applied in 21 day intervals. Herbicides were applied either once, twice, or 3 times in the study. Plot sizes were 40 x 60 inches. Herbicides were applied with a CO2 pressurized backpack sprayer equipped with 80003 XR flat fan nozzles that delivered 25 GPA at 25 psi. The centipedegrass study was a randomized complete block (RCB) design with 30 treatments total. The St. Augustinegrass study was a RCB with 25 total treatments. Quality ratings were collected weekly. The plots were rated on a 1 to 9 scale with 9 being highest quality and 1 being no turf. A rating of 5 was considered minimally acceptable quality. Data were subjected to analysis of variance (P=0.05) and means were separated using Fisher's Protected LSD. Centipedegrass was very tolerant of flazasulfuron, sulfosulfuron, and standard centipedegrass herbicides: sethoxydim and clethodim. Acceptable centipedegrass quality was observed following one or two applications of bispyribac at 1.3 oz/A. However, unacceptable centipedegrass quality occurred following three bispyribac applications at the 1.3 oz/A rate. A single application of bispyribac at 2.6 oz/A maintained acceptable quality. Two or more applications of bispyribac at 2.6 oz/A reduced centipedegrass quality to unacceptable levels. Centipedegrass was sensitive to all applications of trifloxysulfuron during the evaluation period. St. Augustinegrass was sensitive to most sequential herbicide treatments in the study. Flazasulfuron treated plots maintained acceptable quality levels only in single applications at 3 and 4.5 oz. Asulam treated plots were only acceptable after a single application. Bispyribac treated plots maintained acceptable quality levels after single applications at 1.3 and 2.6 oz rates. Only single applications of trifloxysulfuron maintained acceptable ratings. All treatments of sulfosulfuron were acceptable." |
Language: | English |
References: | 0 |
Note: | "Vision for the future" This item is an abstract only! |
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete): Taverner, D., R. E. Strahan, and D. J. Lee. 2006. Tolerance of Palmetto® St. Augustinegrass and common centipedegrass to several postemergenc [postemergence] herbicides. South. Weed Sci. Soc. Proc. 59:p. 112. |
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| Web URL(s): http://www.swss.ws/wp-content/uploads/docs/2006 Proceedings-SWSS.pdf#page=185 Last checked: 07/18/2013 Requires: PDF Reader Notes: Item is within a single large file |
| MSU catalog number: b2207931 |
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