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| Web URL(s): | http://www.newss.org/proceedings/proceedings_2010.pdf#page=23
Last checked: 07/22/2013
Requires: PDF Reader
Notes: Item is within a singel 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): | Reis, A.;
Brosnan, J.;
Breeden, G.;
Elmore, M. |
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| Author Affiliation: | University of Tennessee, Knoxville, TN |
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| Title: | Mesotrione for managing weeds during the establishment of Kentucky bluegrass abd tall fescue turf in the transition zone |
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| Meeting Info.: | Cambridge, MA: January 4-7, 2010 |
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| Source: | Proceedings: 64th Annual Meeting of the NortheasternWeed Science Society. Vol. 64, 2010, p. 7-8. |
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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: Cool season turfgrasses; Crabgrass control; Digitaria ischaemum; Eleusine indica; Establishment; Festuca arundinacea; Goosegrass control; Herbicide efficacy; Herbicide evaluation; Mesotrione; Poa pratensis; Transition zone; Weed control
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| Cultivar Names: | Faith |
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| Abstract/Contents: | "Mesotrione is a triketone herbicide registered for the control of several broadleaf and grassy weeds in cool-season turf. Data evaluating mesotrione use for managing weeds during the establishment of cool-season home lawns is limited. Two research trials were conducted in the spring and summer of 2009 at the East Tennessee Research and Education Center (Knoxville, TN) to evaluate the efficacy of mesotrione as part of weed control programs used during the establishment of tall fescue [Schedonorous phoenix (Scop.) Holub.] home lawns in spring and summer. Trials were conducted on a tilled and leveled Seqautchie loam soil seeded with 'Faith' tall fescue at 38.7 g/m2. Plots (5 by 7 m) were arranged in a randomized complete block design with three replications. Treatments included both single and sequential [6 week after seeding (WAS) or 6 and 12 WAS] mesotrione applications at 280 and 840 g ai/ha. These treatments were compared to applications of mesotrione (280 and 840 g ai/ha) at seeding followed by (fb) quinclorac (840 g ai/ha) at 6 and 12 WAS. Sequential applications were made at 6 and 12 WAS in the spring trial, but only at 6 WAS in the summer trial. All mesotrione treatments included a non-ionic surfactant at a 0.25% v/v ratio, while all quinclorac treatments were delivered with a methylated seed oil surfactant at 1.5 L/ha. An untreated control was included in both the spring and summer trials. Herbicide treatments were applied immediately after seeding the spring trial on 29 April and the summer trial on 26 June. Treatments were applied using a CO2 powered boom sprayer calibrated to deliver 842 L/ha using four, 04 flood-jet nozzles at 248 kPa, configured to provide a 1.8m spray swath. Nozzle spacing was 25 cm and a wheeled aluminum frame maintained the boom at a height of 25 cm while spraying. Weed control, turf injury, and turf cover were evaluated visually utilizing a 0 (no weed control, turf injury, or turf cover) to 100 (complete weed control, turf injury, or turf cover) % scale. In the spring trial, tall fescue cover was rated weekly until 63 days after seeding (DAS), while injury was rated until 112 DAS. Smooth crabgrass (Digitaria ischaemum) and goosegrass (Eleusine indica) control were rated weekly until 105 DAS in the spring trial as well. During the summer trial, tall fescue cover and injury were rated until 63 DAS, while smooth crabgrass and goosegrass control were rated until 70 DAS. All treatments increased tall fescue cover (>93%) compared to the untreated control (60%) at 63 DAS in the spring trial, and no tall fescue injury was reported for any treatment. In the summer trial, no treatment yielded a tall fescue cover value that was significantly different from the untreated control at 63 DAS. Tall fescue injury at 15 DAS exceeded 50% for all mesotrione treatments at 840 g ai/ha applied at seeding. In spring, mesotrione at seeding fb mesotrione or quinclorac at 840 g ai/ha controlled smooth crabgrass ā„80% at 70 DAS. This response was observed for both the 280 and 840 g ai/ha rates of mesotrione. Additionally, all mesotrione treatments applied at seeding controlled goosegrass >85% 42 DAS. Sequential applications of mesotrione at the 840 g ai/ha rate did not increase goosegrass control compared the 280 g ai/ha rate in spring. In summer, all mesotrione treatments applied at seeding provided >85% control of smooth crabgrass at 42 DAS; however this declined to <50% at 70 DAS. Sequential applications of both mesotrione (at both rates) and quinclorac increased smooth crabgrass control to >83% at 70 DAS. Applications of mesotrione (at both rates) at seeding provided 100% control of goosegrass at 20 DAS but this declined to 23% by 70 DAS. Goosegrass control at 70 DAS exceeded 90% for sequential applications of mesotrione at both the 280 and 840 g ai/ha rates applied 6 WAS. These data suggest that mesotrione can be an effective tool for controlling weeds during the establishment of cool-season turfgrasses in spring and summer." |
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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):
Brosnan, J., G. Breeden, and M. Elmore. 2010. Mesotrione for managing weeds during the establishment of Kentucky bluegrass abd tall fescue turf in the transition zone. Proc. Annu. Meet. Northeast. Weed Sci. Soc. 64:p. 7-8. |
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| Web URL(s):
http://www.newss.org/proceedings/proceedings_2010.pdf#page=23
Last checked: 07/22/2013
Requires: PDF Reader
Notes: Item is within a singel large file |
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MSU catalog number: SB 610 .N62 v. 60 |
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