Full TGIF Record # 270810
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Web URL(s):http://www.wsweedscience.org/wp-content/uploads/2013/09/WSWS_2015_Proceedings_FINAL_v2.pdf#page=66
    Last checked: 04/11/2016
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Publication Type:
Content Type:Abstract or summary only
Author(s):Umeda, Kai
Author Affiliation:University of Arizona, Phoenix, AZ
Title:Topramezone weed control efficacy and safety in warm- and cool-season turfgrasses
Section:General session: Project 2: Weeds of horticultural crops
Other records with the "General session: Project 2: Weeds of horticultural crops" Section
Meeting Info.:Portland, Oregon: March 9-12, 2015
Source:Western Society of Weed Science Annual Meeting 2015. Vol. 68, 2015, p. 66-67.
# of Pages:2
Publishing Information:Las Cruces, New Mexico: Western Society of Weed Science
Keywords:TIC Keywords: Agrostis stolonifera; Cool season turfgrasses; Cynodon dactylon x Cynodon transvaalensis; Goosegrass control; Herbicide application; Herbicide efficacy; Herbicide evaluation; Herbicide injury; Herbicide resistance; Lolium perenne; Metribuzin; Phytotoxicity; Poa pratensis; Topramezone; Triclopyr; Warm season turfgrasses; Weed control
Cultivar Names:Tifway 419
Abstract/Contents:"Small plot experiments were conducted in the low desert near Phoenix, AZ on a golf course in a rough area infested with goosegrass (Eleusine indica) adjacent to a fairway with Tifway 419 bermudagrass during the summers in 2013 and 2014. The goosegrass was mature and seedheads were prevalent at the initiation of the field trial on 13 August 2013. Sequential applications of topramezone at 0.0055, 0.011, and 0.016 lb a.i./A were made on 03 September. A single application of topramezone at 0.022 lb a.i./A gave 95% goosegrass control but bermudagrass injury was severe for over 2 weeks. Two applications of topramezone at lower rates controlled goosegrass but injury following the second application was especially severe on bermudagrass. Topramezone at 0.0055 lb a.i./A gave marginally acceptable goosegrass control with bermudagrass recovering to an acceptable level. Another experiment was initiated on 11 July 2014 when the oldest goosegrass was in the boot stage and first seedheads were appearing and sequential applications were made on 07 August. All topramezone treatments gave near complete control of goosegrass. Bermudagrass injury was approaching acceptable for only the 0.0055 lb a.i./A rate of application of topramezone. Topramezone at 0.022 lb a.i./A combined with metribuzin or triclopyr 67 applied once was extremely injurious to the bermudagrass while giving acceptable goosegrass control. A series of small plot experiments were conducted at various elevations (2,100 to 4,500 ft) around Arizona where Tifway 419 bermudagrass is a weed that encroaches upon creeping bentgrass golf greens and into perennial ryegrass and Kentucky bluegrass mix collars around greens. Fall or spring applications of topramezone at 0.022 lb a.i./A, three applications, and 0.033 lb a.i./A, 2 applications, demonstrated severe phytotoxicity on bermudagrass following each application. Creeping bentgrass, perennial ryegrass, and Kentucky bluegrass were tolerant and exhibited minimal injury"
See Also:See also related presentation "Topramezone weed control efficacy and safety in warm- and cool-season turfgrasses" ASA, CSSA and SSSA Annual Meetings [2014], 2014, p. 86760, R=250130. R=250130
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Umeda, K. 2015. Topramezone weed control efficacy and safety in warm- and cool-season turfgrasses. Proc. West. Soc. Weed Sci. 68:p. 66-67.
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    Last checked: 04/11/2016
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    Notes: Item is within a single large file
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