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| Web URL(s): | http://www.swss.ws/wp-content/uploads/docs/2012 Proceedings-SWSS.pdf#page=293
Last checked: 08/07/2013
Requires: PDF Reader
Notes: Item is within a single large file |
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| Publication Type:
| Report |
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| Author(s): | Cox, M. C.;
Askew, S. |
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| Author Affiliation: | Virginia Tech, Blacksburg, VA |
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| Title: | Goosegrass control and bermudagrass response to herbicide programs |
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| Section: | Graduate student contest
Other records with the "Graduate student contest" Section
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| Meeting Info.: | Charleston, South Carolina: January 23-25, 2012 |
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| Source: | 2012 Proceedings, Southern Weed Science Society. Vol. 65, 2012, p. 221. |
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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: Cynodon dactylon; Dyes; Goosegrass control; Herbicide efficacy; Herbicide evaluation; Herbicide injury; Herbicide program; Iron chelates; Visual evaluation
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| Abstract/Contents: | "With the removal of MSMA from most turfgrass markets, turf managers, particularly sports turf managers have a new challenge-control of mature goosegrass. Several herbicides are available for effective control of goosegrass at seedling stages, however, control programs for goosegrass at the >2 tiller stage are lacking. A few herbicide programs have controlled mature goosegrass but high costs and significant turf injury have decreased their credibility and use by turf managers. The objectives of this study were to evaluate efficacy of programs that include low rate and repeat applications of various herbicides for control of mature goosegrass (>12 tillers) and determine if the addition of PAR turf dye or chelated iron effectively masks any visual injury to bermudagrass, in order to reduce costs and improve turf quality from goosegrass control programs. A total of 30 treatments were applied to a bermudagrass rough at The Cedars Golf Course in Chatham, Virginia on August 12, 2011 and two varieties of bermudagrass ('Yukon' and 'Riviera') at the Glade Road Research Facility at Virginia Tech in Blacksburg, Virginia on August 15, 2011. Each herbicide was applied with either the addition of chelated iron at 7 kg ai ha-1, PAR turf dye at 1.17 kg ai ha-1, or no additive. Herbicide treatments included: MSMA (2.19 kg ai ha-1) + metribuzin (0.56 kg ai ha-1) at 1 application (app), metribuzin (0.56 kg ai ha-1) + quinclorac (0.42 kg ai ha-1) at 1 app, metribuzin (0.28 kg ai ha-1) + quinclorac (0.21 kg ai ha-1) at 1 app, metribuzin (0.28 kg ai ha-1) + quinclorac (0.21 kg ai ha-1) at 2 apps, metribuzin (0.14 kg ai ha-1) + quinclorac (0.21 kg ai ha-1) at 4 apps, metribuzin (0.07 kg ai ha-1) + quinclorac (0.109 kg ai ha-1) at 4 apps, metribuzin (0.07 kg ai ha-1) + quinclorac (0.42 kg ai ha-1) + sulfentrazone (0.21 kg ai ha-1) at 4 apps, metamifop (200 g ai ha-1) and metamifop (400 g ai ha-1) at 1 app. An untreated check was also incorporated for comparisons. All treatments were applied at 280 L ha-1 using Teejet flat fan 11004 nozzles at 262 kPa. Metribuzin (0.14 kg ai ha-1) + quinclorac (0.21 kg ai ha-1) and metribuzin (0.07 kg ai ha-1) + quinclorac (0.21 kg ai ha-1) + sulfentrazone (0.21 kg ai ha-1) controlled mature goosegrass significantly better than all other treatments 8 WAT when pooled over all additives. When compared between additives and within herbicide treatments, metribuzin (0.14 kg ai ha-1) + quinclorac (0.21 kg ai ha-1) applied with no additive and chelated iron did not significantly differ from metribuzin (0.07 kg ai ha-1) + quinclorac (0.21 kg ai ha-1) + sulfentrazone (0.21 kg ai ha-1) applied with no additive, chelated iron, and PAR. Only these herbicide programs controlled goosegrass greater than 85%. The two herbicide programs that controlled goosegrass did not injure Yukon and Riviera bermudagrass greater than the 30% threshold when chelated iron or PAR was added. Metribuzin (0.56 kg ai ha-1) + MSMA (2.19 kg ai ha-1) injured bermudagrass 65 to 90% and more than other treatments but turf injury was decreased on both bermudagrass varieties to less than 40% when chelated iron was added. These data indicate that 4 applications of metribuzin (0.14 kg ai ha-1) + quinclorac (0.21 kg ai ha-1) and metribuzin (0.07 kg ai ha-1) + quinclorac (0.21 kg ai ha-1) + sulfentrazone (0.21 kg ai ha-1) with no additive controlled mature goosegrass better than all other treatment combinations; however, the addition of chelated iron or PAR to the herbicide treatment is needed to mask injury in some bermudagrass varieties. Future work will evaluate more specifically the influence of quinclorac and sulfentrazone on metribuzin efficacy for goosegrass control." |
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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):
Cox, M. C., and S. Askew. 2012. Goosegrass control and bermudagrass response to herbicide programs. South. Weed Sci. Soc. Proc. 65:p. 221. |
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| Web URL(s):
http://www.swss.ws/wp-content/uploads/docs/2012 Proceedings-SWSS.pdf#page=293
Last checked: 08/07/2013
Requires: PDF Reader
Notes: Item is within a single large file |
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MSU catalog number: b2207931 |
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