Full TGIF Record # 225015
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Web URL(s):http://www.swss.ws/wp-content/uploads/docs/2004%20Proceedings-SWSS.pdf#page=446
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Author(s):Teuton, T. C.; Sorochan, J. C.; Main, C. L.; Campbell, B. N.; Mueller, T. C.
Author Affiliation:Department of Plant Sciences, University of Tennessee, Knoxville, TN
Title:Selective control of overseeded perennial ryegrass in bermudagrass with ALS herbicides
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Meeting Info.:Memphis, Tennessee: January 26-28, 2004
Source:Proceedings: Southern Weed Science Society: 57th Annual Meeting. Vol. 57, 2004, p. 348.
# of Pages:1
Publishing Information:Champaign, Illinois: Southern Weed Science Society
Keywords:TIC Keywords: Chemical control; Cynodon dactylon; Herbicide efficacy; Herbicide evaluation; Lolium perenne; Selective weed control; Transitional overseeding
Abstract/Contents:"Perennial ryegrass (Lolium perenne L.) is commonly used in the transition zone for overseeding home lawns, golf courses, and sports fields of dormant bermudagrass (Cynodon dactylon L. Pers.). Traditionally turfgrass managers have relied on warmer weather and bermudagrass competition to transition back to the bermudagrass base. However, with the recent influx of acetolactate synthase (ALS) inhibiting herbicides, chemical transition may be possible. This would allow for healthier, more uniform bermudagrass turf for the warmer months of summer. Research was initiated in the spring of 2003 at the University of Tennessee football practice facility to evaluate selective control of perennial ryegrass with ALS herbicides compared to diclofop, a non-ALS herbicide. Treatments included foramsulfuron at 0.02, 0.05, and 0.02 followed by (fb) 0.02 kg ai/ha, trifloxysulfuron at 0.03, 0.05, and 0.03 fb 0.03 kg ai/ha, metsulfuron 0.02, 0.04, and 0.02 fb 0.02 kg ai/ha, rimsulfuron at 0.02 and 0.01 fb 0.01 kg ai/ha, and diclofop at 1.14 and 1.14 fb 1.14 kg ai/ha. Sequential applications were made 5 wk after initial application (WAA). Perennial ryegrass was evaluated for percent control (0-100) and bermudagrass was evaluated for percent injury (0-100) and quality (0-9). All herbicides, except diclofop, provided > 90% control 3 WAA. However, by 5 WAA only foramsulfuron at 0.05 kg ai/ha and trifloxysulfuron at 0.03, 0.05, and 0.03 fb 0.03 kg ai/ha provided > 90% control. Perennial ryegrass control 7 WAA improved following the sequential herbicide application (>98% control) for all herbicides except diclofop. Trifloxysulfuron was the only herbicide to provide acceptable control (96%) 7 WAA with a single application. Rimsulfuron was the only herbicide to cause bermudagrass injury (8%), however injury was mostly stunting and did not effect overall turfgrass quality. Quality evaluations for all herbicide treatments were not statistically different from the untreated control 7 WAA. Overall, all ALS herbicides tested performed better than diclofop and can be used with excellent bermudagrass safety. ALS herbicides allow turfgrass managers another safe option for transitioning from bermudagrass winter dormancy to a vigorous bermudagrass base for summer."
Note:"The changing world of weed science"
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ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Teuton, T. C., J. C. Sorochan, C. L. Main, B. N. Campbell, and T. C. Mueller. 2004. Selective control of overseeded perennial ryegrass in bermudagrass with ALS herbicides. South. Weed Sci. Soc. Proc. 57:p. 348.
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    Last checked: 07/17/2013
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