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| Web URL(s): | http://www.swss.ws/wp-content/uploads/docs/2009 Proceedings-SWSS.pdf#page=513
Last checked: 07/25/2013
Requires: PDF Reader
Notes: Item is within a single large file |
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| Publication Type:
| Report |
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| Author(s): | Goddard, M. J.;
Willis, J. B.;
Askew, S. D. |
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| Author Affiliation: | Turfgrass Weed Science, Virginia Tech, Blacksburg, VA |
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| Title: | Improving creeping bentgrass infested turf with mesotrione and seeding |
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| Section: | SWSS - Ph.D. Oral Paper Contest
Other records with the "SWSS - Ph.D. Oral Paper Contest" Section
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| Meeting Info.: | Orlando, Florida: February 9-12, 2009 |
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| Source: | 2009 Proceedings, Southern Weed Science Society. Vol. 62, 2009, p. 443. |
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| Publishing Information: | Champaign, Illinois: Southern Weed Science Society |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Agrostis stolonifera; Application timing; Establishment; Festuca arundinacea; Golf greens; Herbicide evaluation; Mesotrione; Resazurin test; Research; Weed control
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| Trade Names: | Tenacity |
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| Abstract/Contents: | "Creeping bentgrass is maintained as a desirable turf on many golf course fairways, greens, and tees. Cultural practices such as core aeration, slicing, and seeding can move propagules into surrounding turfgrass, causing weed problems. Until recently, selective control of creeping bentgrass in cool season turf has not been available. Mesotrione is a herbicide that received registration for use in turfgrass in 2008 under the trade name Tenacity™. Mesotrione can selectively control creeping bentgrass in cool season turf and is safe to use at seeding of many cool season turfgrasses. When patches of creeping bentgrass are controlled, voids in the turf canopy are unsightly and may lead to other weed infestation. By integrating the use of mesotrione at different timings before and after seeded reestablishment of the contaminated areas, we hope to provide an option for optimum bentgrass control while preserving turfgrass quality. Our objectives are to 1) evaluate mesotrione for bentgrass control during seeded establishment of four turfgrasses, and 2) determine optimum timing for controlling creeping bentgrass during seeded establishment of turfgrasses. This trial was initiated at two locations in Blacksburg, VA in 2007. The first location was established on August 7, 2007 in a tall fescue rough infested with bentgrass at Blacksburg Country Club (BCC). The second location was established August 9, 2007 on an L-93 creeping bentgrass fairway at Virginia Tech's Turfgrass Research Center (TRC) which was reestablished to Kentucky bluegrass, perennial ryegrass, tall fescue, and fine fescue seeded at 147, 391, 488, and 391 kg pure live seed/ha, respectively. Treatments were arranged in a randomized complete block design with 5 treatments and 4 replications. At each location, treatments included mesotrione applied at 140 and 175 g ai/ha, 2 weeks prior to seeding, at seeding, and 3 weeks after seeding (WAS); mesotrione applied at 140 g ai/ha, 4 and 2 weeks prior to seeding, at seeding, and 3 WAS; mesotrione applied at 140 g ai/ha, 2 weeks prior to seeding, at seeding, and 3 and 5 WAS; and a nontreated check. At BCC, initial bentgrass cover at the trial location was between 82 and 96%. All treatments resulted in greater than 96% control of creeping bentgrass 11 WAS and were not significantly different. At this same rating, tall fescue cover ranged from 76-83% in all treatments. Evaluations the following spring showed all treatments contained greater than 97% tall fescue for each treatment combination. At the TRC, turfgrass cover in the reestablished areas varied due to germination rates of the different species. The best treatment resulted in 20, 72, 44, and 20% cover 2 months after seeding, and 74, 94, 86, and 53% cover the following spring for Kentucky bluegrass, perennial ryegrass, tall fescue, and fine fescue, respectively. No treatments caused unacceptable injury to the newly seeded turfgrasses. The integration of mesotrione at seeding is a very effective method of reestablishing desirable tolerant cool season turfgrasses from seed in an area where bentgrass formerly was a problem." |
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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):
Goddard, M. J., J. B. Willis, and S. D. Askew. 2009. Improving creeping bentgrass infested turf with mesotrione and seeding. South. Weed Sci. Soc. Proc. 62:p. 443. |
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| Web URL(s):
http://www.swss.ws/wp-content/uploads/docs/2009 Proceedings-SWSS.pdf#page=513
Last checked: 07/25/2013
Requires: PDF Reader
Notes: Item is within a single large file |
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MSU catalog number: b2207931 |
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