Full TGIF Record # 224873
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Web URL(s):http://www.ncwss.org/proceed/NCWSS-2012-Proceedings.pdf#page=90
    Last checked: 07/16/2013
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Publication Type:
i
Report
Author(s):Breeden, Gregory K.; Brosnan, James; Patton, Aaron J.; Weisenberger, Dan V.
Author Affiliation:Breeden and Brosnan: University of Tennessee, Knoxville, TN; Patton: Purdue University, W. Lafayette; Weisenberger: Purdue University, Lafayette, IN
Title:Annual grassy weed control in cool-season turf with topramezone
Section:Foresty/industrial/turf/aqautics/forage/range
Other records with the "Foresty/industrial/turf/aqautics/forage/range" Section
Meeting Info.:St. Louis, MO: December 10-13, 2012
Source:67th Annual Meeting of the North Central Weed Science Society. Vol. 67, 2012, p. 90-91.
# of Pages:2
Publishing Information:Champaign, Illinois: North Central Weed Science Society
Keywords:TIC Keywords: Digitaria ischaemum; Festuca arundinacea; Herbicide evaluation; HPPD inhibitors; Poa pratensis; Topramezone; Triclopyr
Abstract/Contents:"Topramezone is a new hydroxyphenylpyruvate dioxygenase (HPP D) inhibiting herbicide being evaluated for use in cool-season turfgrass. Data describing cool-season turfgrass tolerance and weed control efficacy with topramezone are limited. Separate trials were conducted in 2012 evaluating the efficacy of topramezone applications for smooth crabgrass (Digitaria ischaemum) control. The site for each trial was a mature stand of tall fescue (Festuca arundinacea) maintained as a golf course rough at the East Tennessee Research and Education Center-Plant Sciences Unit (Knoxville, TN) and a mature stand of Kentucky bluegrass (Poa pratensis) at the William H. Daniel Turfgrass Research and Diagnostic Center (West Lafayette, IN). Plots were 1.5 by 3 m in Tennessee and 1.5 by 1.5 m in Indiana at each location were arranged in a randomized complete block design with three replications. Treatments included the factorial combination of topramezone (12.3 g ha-1 and 24.5 g ha-1 ) and triclopyr (1120 g ha-1 ) applied at three stages of smooth crabgrass growth: 1-3 leaf, 1-3 tiller and 5-7 tiller. An untreated control was included for comparison. All herbicides were applied with a CO2 powered boom sprayer calibrated to deliver 281 L ha-1 utilizing four, flat-fan, 8002 nozzles at 124 kPa, configured to provide a 1.5-m spray swath. Tall fescue injury, smooth crabgrass bleaching, and smooth crabgrass control were evaluated visually utilizing a 0 (e.g., no turf injury, control, or bleaching) to 100% (e.g., complete kill) scale at 1, 2, 4, 6, and 9 weeks after treatment (WAT). At no time durin g these studies was tall fescue injury observed at either location. In Tennessee, applications of topramezone (12.3 g ha-1 and 24.5 g ha-1 ) + triclopyr at the 1-3 leaf stage controlled smooth crabgrass >= 87% 4 WAT. When applied at the 1-3 tiller stage, all topramezone and topramezone + triclopyr treatments controlled smooth crabgrass >= 90% 4 WAT. Topramezone (12.3 and 24.5 g ha-1 ) applied 1-3 tiller bleached crabgrass >= 30% 1 WAT and >= 8% 2 WAT. The addition of triclopyr to topramezone at this timing reduced bleaching to 0% 1 and 2 WAT. Applied at the 5-7 tiller stage, topramezone (24.5 g ha-1 ) and topramezone (24.5 g ha-1 ) + triclopyr controlled smooth crabgrass >= 93% 4 WAT; at 12.3 g ha-1 these treatments controlled smooth crabgrass >= 70%. Both rates of topramezone applied at the 5-7 tiller stage bleached crabgrass >= 36% 1 WAT and >= 20% 2 WAT. However, the addition of triclopyr to topramezone reduced bleaching to <= 5% 1 and 2 WAT. In Indiana, applications of topramezone (12.3 g ha-1 and 24.5 g ha-1 ) + triclopyr at the 1-3 leaf stage controlled smooth crabgrass >= 78% 4 WAT. All treatments applied at the 1-3 and 5-7 tiller stages controlled smooth crabgrass <= 45% 4 WAT. Topramezone (12.3 and 24.5 g ha-1 ) applied at the 1-3 tiller stage bleached smooth crabgrass >= 23% 1 WAT and >= 25% 2 WAT. The addition of triclopyr to topramezone at this timing reduced bleaching to <= 13% 1 and 2 WAT. Bleaching responses at the 5-7 tiller stage were similar. Despite the activity of topramezone and reductions in bleaching observed with applications of topramezone + triclopyr at the 1-3 and 5-7 tiller stages growth, smooth crabgrass control measured <= 75% with all treatments by 9 WAT except topramezone (24.5 g ha-1) + triclopyr applied at the 1-3 tiller stage in Tennessee. These responses illustrate that sequential applications of these herbicides will be required for effective postemergence smooth crabgrass control."
Language:English
References:0
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Breeden, G. K., J. Brosnan, A. J. Patton, and D. V. Weisenberger. 2012. Annual grassy weed control in cool-season turf with topramezone. Proc. North Cent. Weed Sci. Soc. 67:p. 90-91.
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http://www.ncwss.org/proceed/NCWSS-2012-Proceedings.pdf#page=90
    Last checked: 07/16/2013
    Requires: PDF Reader
    Notes: Item is within a single large file
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