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| Web URL(s): | http://www.newss.org/proceedings/proceedings_2005.pdf#page=113
Last checked: 07/22/2013
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Notes: Item is within a single large file |
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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Derr, J. F.;
Serensits, T. J. |
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| Author Affiliation: | Virginia Tech, Virginia Beach, VA |
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| Title: | Goosegrass and dallisgrass control in bermudagrass |
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| Section: | Turfgrass and plant growth regulators
Other records with the "Turfgrass and plant growth regulators" Section
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| Meeting Info.: | Capital Hilton, Washington, D.C.: January 3-6, 2005 |
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| Source: | Proceedings: NortheasternWeed Science Society. Vol. 59, 2005, p. 99-100. |
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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: Eleusine indica; Paspalum dilatatum; Weed control; Cynodon dactylon; Foramsulfuron; Trifloxysulfuron; Rimsulfuron; Postemergence weed control; Herbicide evaluation; Herbicide injury; Cynodon transvaalensis; Application rates
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| Cultivar Names: | Tifsport; Yukon; Princess 77 |
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| Abstract/Contents: | "Goosegrass (Eleusine indica (L.) Gaertn.) and dallisgrass (Paspalum dilatatum Poir.) are common and troublesome weeds in bermudagrass turf. Few options exist for postemergence control. Several new herbicides, including foramsulfuron, trifloxysulfuron, and rimsulfuron, have been developed for use in this warm-season turf species, but most of the emphasis has been placed on these products as transitioning tools. These products may have utility for selective weed control during the summer. In the first experiment, foramsulfuron at a 0.026 lb ai/A and trifloxysulfuron at 0.022 lb ai/A were applied postemergence to tillered goosegrass in 'Yukon' and 'Princess 77' common bermudagrass (Cynodon dactylon (L.) Pers.) that had been seeded 21 and 27 days earlier, respectively. These herbicides were compared to atrazine at 1.0 lb ai/A and MSMA applied twice at 2.0 lb ai/A, with the second application occurring 5 days after the first. Foramsulfuron and trifloxysulfuron caused less than 10% injury to Princess 77 common bermudagrass at 14 days after treatment (DAT) but this injury disappeared by 24 DAT. Greater injury (18%) was seen in Yukon, but the injury was slight at 25 DAT. Trifloxysulfuron and atrazine did not control goosegrass, while foramsulfuron reduced goosegrass ground cover by 68% in Princess 77 but only 18% in Yukon, perhaps due to the faster growth rate of Princess 77. In another postemergence trial conducted in Yukon, foramsulfuron reduced goosegrass cover 54% 40 DAT, while a single application of metribuzin at 0.25 lb/A or trifloxysulfuron did not reduce goosegrass cover and MSMA applied twice at 2.0 lb ai/A reduced cover by 24%. A postemergence trial containing tillered goosegrass was established one month after sprigging 'Tifsport' hybrid bermudagrass (C. dactylon (L.) Pers. x C. trannsvaalensi Burtt-Davys). A second application of each herbicide was made 11 days after the first. Foramsulfuron at 0.026 and 0.039 lb/A and foramsulfuron at 0.026 lb/A plus MSMA at 2.0 controlled goosegrass 97 to 99% 29 DAT. Diclofop at 1.0 lb/A gave 91% control, with metribuzin at 0.25 lb/A controlling 87%. MSMA applied alone controlled goosegrass 60%, while rimsulfuron at 0.031 lb/A did not control goosegrass. A similar trial was conducted in the greenhouse, with foramsulfuron at 0.013 lb/A replacing the foramsulfuron plus MSMA treatment. Only single applications of each herbicide were made. Foramsulfuron at 0.013, 0.026, and 0.039 reduced goosegrass shoot fresh weight by 95 to 98% while diclofop completely controlled goosegrass. MSMA at 2.0 lb/A reduced goosegrass shoot fresh weight by 60%, while rimsulfuron reduced shoot weight by 71% and metribuzin causing a 44% reduction in goosegrass shoot weight. A postemergence trial evaluated foramsulfuron applied at rates ranging from 0.5 to 4 fl oz/gallon applied once or twice, spaced either 2 or 4 weeks apart, or 5 days after MSMA was applied at 2.0 lb/A. Single applications of foramsulfuron provided approximately 30 to 50% dallisgrass control. For plots recieving 2 applications of foramsulfuron, dallisgrass control increased as herbicide rate increased. Control appeared to be better when the second application was made 4 weeks compared to 2 weeks after the initial application. Maximum dallisgrass control (83% at 63 days after initial treatment) in this trial occurred when foramsulfuron was applied twice at 4 fl oz/gallon with the applications spaced one month apart. Applying MSMA 5 days prior to foramsulfuron resulted in control similar to 2 applications of foramsulfuron spaced 2 weeks apart. Foramsulfuron applied once postemergence provides significant suppression of goosegrass, with two applications providing excellent control. It provides generally greater goosegrass control than metribuzin or MSMA, and equivalent control to diclofop. Trifloxysulfuron and rimsulfuron do not provide acceptable control of goosegrass. Two applications of foramsulfuron at 3 to 4 fl oz/gallon provide fair (approximately 60 to 80%) dallisgrass control, but further treatment would be required if excellent control was desired." |
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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):
Derr, J. F., and T. J. Serensits. 2005. Goosegrass and dallisgrass control in bermudagrass. Proc. Annu. Meet. Northeast. Weed Sci. Soc. 59:p. 99-100. |
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| Web URL(s):
http://www.newss.org/proceedings/proceedings_2005.pdf#page=113
Last checked: 07/22/2013
Requires: PDF Reader
Notes: Item is within a single large file |
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MSU catalog number: SB 610 .N62 v. 57 |
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