Full TGIF Record # 227332
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Web URL(s):http://www.swss.ws/wp-content/uploads/docs/2013 Proceedings-SWSS.pdf#page=90
    Last checked: 08/12/2013
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Publication Type:
Author(s):Smith, A.; Cox, M.; Askew, S. D.; Miller, K.
Author Affiliation:Smith, Cox and Askew: Virginia Tech, Blacksburg; Miller: BASF, Richmond, VA
Title:Topramezone for crabgrass and goosegrass control in cool season turf
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Meeting Info.:Houston, Texas: January 28-30, 2013
Source:Proceedings of the Southern Weed Science Society: 66th Annual Meeting. Vol. 66, 2013, p. 3.
# of Pages:1
Publishing Information:Champaign, Illinois: Southern Weed Science Society
Keywords:TIC Keywords: Application rates; Cool season turfgrasses; Crabgrass control; Goosegrass control; HPPD inhibitors; Herbicide combinations; Herbicide efficacy; Quinclorac; Topramezone; Triclopyr
Abstract/Contents:"Topramezone is a HPPD- inhibiting post-emergence herbicide, currently labeled in corn and is expected to be labeled in cool-season turfgrass. It controls many broadleaf and grass weed species and exhibits safety to several cool-season turfgrasses. The objective of this research was to determine the efficacy of topramezone alone or in combination with triclopyr or quinclorac for goosegrass (Eleusine indica (L.) Gaertn.) and smooth crabgrass (Digitaria ischaemum Schreb. Ex Muhl.) control in cool-season turfgrass. Trials were initiated in July 2012 in perennial ryegrass and Kentucky bluegrass. Treatments were topramezone alone applied twice at 33.6 g ai/ha, topramezone + triclopyr (1.12 kg ai/ha) applied twice, topramezone + quinclorac (0.426 kg ai/ha) applied twice, and mesotrione (0.213 kg ai/ha) applied twice. All second applications were made at a 3-week interval. All topramezone treatments included a methylated seed oil surfactant (0.5% v/v), and the mesotrione treatment included a nonionic surfactant (0.25% v/v). A non-treated check was included for comparison. Percent cover of desired turfgrass, percent cover of goosegrass or crabgrass, percent control of goosegrass or crabgrass, and percent cover of white tissue was estimated and recorded. At trial initiation, smooth crabgrass cover ranged from 63-73%. At 1 week after initial treatment (WAIT), topramezone plus quinclorac controlled smooth crabgrass 82%, while all other treatments controlled smooth crabgrass 50%. White tissue cover, an undesirable result of using an HPPD- inhibiting herbicide that decreases turf aesthetics, was 80 and 83% in plots treated with topramezone and mesotrione applied alone, respectively and 0% from combinations of topramezone with quinclorac or triclopyr. At 2 WAIT, all treatments with topramezone controlled smooth crabgrass 97-100%, while mesotrione alone controlled crabgrass 50%. White tissue cover was 0% from combinations with triclopyr or quinclorac, 1.3% from topramezone alone, and 12% from mesotrione alone. At 3 WAIT, the second treatment was applied, resulting in similar trends. Plots receiving topramezone or topramezone in combination with triclopyr or quinclorac maintained excellent control of smooth crabgrass. In plots infested with goosegrass, topramezone alone or in combination with triclopyr controlled goosegrass 97-98%, significantly better than topramezone plus quinclorac (92%) or mesotrione alone (13%) at 3 WAIT. Topramezone plus quinclorac and topramezone plus triclopyr resulted in significantly less white tissue cover than all other treatments. At 8 WAIT, all plots receiving topramezone or a combination of topramezone and triclopyr or quinclorac had 99-100% turf cover with no white tissue cover. Mesotrione was the least effective treatment for controlling goosegrass, resulting in 43% control. These data suggest that topramezone may be an effective postemergence herbicide treatment for goosegrass and smooth crabgrass, and when combined with triclopyr or quinclorac, will cause minimal white tissue injury. Turfgrass managers needing to maintain turf aesthetics have the option of using topramezone as a selective herbicide in cool-season turfgrass."
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ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Smith, A., M. Cox, S. D. Askew, and K. Miller. 2013. Topramezone for crabgrass and goosegrass control in cool season turf. South. Weed Sci. Soc. Proc. 66:p. 3.
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http://www.swss.ws/wp-content/uploads/docs/2013 Proceedings-SWSS.pdf#page=90
    Last checked: 08/12/2013
    Requires: PDF Reader
    Notes: Item is within a single large file
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