Full TGIF Record # 225381
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Web URL(s):http://www.swss.ws/wp-content/uploads/docs/2006 Proceedings-SWSS.pdf#page=182
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Report
Author(s):Askew, S. D.; Ricker, D. B.; Willis, J. B.
Author Affiliation:Virginia Tech, Blacksburg, VA
Title:Weed control and bermudagrass response to ALS-inhibiting herbicides applied in mixtures with broadleaf herbicides
Section:Weed management in turf grass
Other records with the "Weed management in turf grass" Section
Meeting Info.:San Antonio, Texas: January 23-25, 2006
Source:Proceedings: Southern Weed Science Society 59th Annual Meeting. Vol. 59, 2006, p. 109.
Publishing Information:Champaign, Illinois: Southern Weed Science Society
# of Pages:1
Keywords:TIC Keywords: Acetolactate synthase-inhibiting herbicides; Broadleaf herbicides; Cynodon dactylon; Herbicide efficacy; Herbicide evaluation; Weed control
Abstract/Contents:"Flazasulfuron, foramsulfuron, sulfosulfuron, and trifloxysulfuron are new sulfonylurea herbicides for use in turfgrass. Like most ALS-inhibiting herbicides, these products have a high degree of selectivity and are seldom effective on all weeds. Turfgrass practitioners desire to control all weeds with minimal treatments and often resort to tank mixtures of multiple herbicides to broaden the spectrum of weed control. Although a wealth of knowledge on effectiveness of the aforementioned products has been gained over the past few years, few studies have evaluated these products in tank mixtures with broadleaf herbicides. Thus, studies were conducted in Blacksburg, VA to evaluate effectiveness of flazasulfuron, foramsulfuron, sulfosulfuron, and trifloxysulfuron applied alone or combined with several broadleaf herbicides for weed control and response of four bermudagrass cultivars. The study was conducted on a research fairway maintained at 5/8 inch at the Turfgrass Research Center in a randomized complete block design with four replications. The site consisted of 16 large plots that comprised four 1-yr-old bermudagrass cultivars arranged randomly within four blocks. Thus, bermudagrass cultivars served as replication in this study. The four sulfonylurea herbicides and tank mixtures were arranged as a split plot with four sulfonylurea herbicides as main plots and 15 subplots arranged in a two by seven factorial plus a nontreated control. The subplots were comprised of two sulfonylurea rates (low and high) and seven tank mixture options. These sixty treatments were randomly arranged with split plot structure in replications 1, 2, 3, and 4 on 'Riviera', 'Yukon', 'Princess 77', and 'Savannah' bermudagrasses, respectively. Data were analyzed in SAS to evaluate the split plot structure; however, a separate analysis was conducted with the four sulfonylurea herbicides as replication to test the main effect of bermudagrass cultivar. Sulfonylurea herbicide rates included flazasulfuron at 1.0 and 1.5 oz/A, foramsulfuron at 8.5 and 17 fl oz/A, sulfosulfuron at 1.0 and 1.5 oz/A, and trifloxysulfuron at 0.33 and 0.56 oz/A. Tank mix options included nothing, quinclorac (Drive) at 1.0 lb/A, triclopyr + clopyralid (Confrontā„¢) at 1.5 pt/A, 2,4-D + dicamba + MCPP + carfentrazone (Speedzoneā„¢) at 4 pt/A, carfentrazone (Quicksilverā„¢) at 1.5 fl oz/A, metsulfuron (Manorā„¢) at 0.5 oz/a, and primisulfuron at 1.0 oz/A. Treatments were applied on May 17, 2005 and NIS was included at 0.25 % v/v as appropriate. Data included visually estimated control of smooth crabgrass (Digitaria ischaemum), large crabgrass (D. sanguinalis), annual bluegrass (Poa annua), and corn speedwell (Veronica arvensis) and bermudagrass injury and cover. Crabgrass was the predominant weed in this study and tended to influence bermudagrass cover and turfgrass quality. Those herbicides that controlled large and smooth crabgrass tended to improve bermudagrass cover and quality the most. The main effect of sulfonylurea herbicide was strongly significant for both crabgrass control and bermudagrass cover. These herbicides can be ranked from highest to lowest crabgrass control in the following order: trifloxysulfuron> flazasulfuron> sulfosulfuron> foramsulfuron. Only three instances of reduced weed control by tank mixtures were noted. These occurred with annual bluegrass control and were flazasulfuron + Driveā„¢, sulfosulfuron + Confrontā„¢, and sulfosulfuron + Manorā„¢. Corn speedwell, large crabgrass, and smooth crabgrass control were not decreased by the various tank mixtures compared to sulfonylurea herbicides alone; however, cool-season grasses like annual bluegrass may be antagonized by some tank mixtures, especially hormone-type broadleaf herbicides like Confront and Speedzoneā„¢."
Language:English
References:0
Note:"Vision for the future"
This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Askew, S. D., D. B. Ricker, and J. B. Willis. 2006. Weed control and bermudagrass response to ALS-inhibiting herbicides applied in mixtures with broadleaf herbicides. South. Weed Sci. Soc. Proc. 59:p. 109.
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http://www.swss.ws/wp-content/uploads/docs/2006 Proceedings-SWSS.pdf#page=182
    Last checked: 07/18/2013
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    Notes: Item is within a single large file
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