Full TGIF Record # 265531
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Web URL(s):http://www.newss.org/proceedings/proceedings-2014.pdf#page=69
    Last checked: 10/05/2015
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Publication Type:
i
Report
Author(s):Cox, M. C.; Askew, S. D.; Loughner, D.
Author Affiliation:Virginia Tech, Blacksburg, VA
Title:Chem-lawn spray gun vs. boom for dithiopyr plus florasulam performance in lawn turf
Section:Graduate student presentations
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Meeting Info.:Philadelphia, Pennsylvania: January 6-9, 2014
Source:Proceedings of the Sixty-eighth Annual Meeting of the Northeastern Weed Science Society. Vol. 68, 2014, p. 68.
Publishing Information:College Park, Maryland: The University of Maryland
# of Pages:1
Keywords:TIC Keywords: 2,4-D + Mecoprop + Dicamba; Application timing; Boom sprayers; Comparisons; Crabgrass control; Dithiopyr; Florasulam; Herbicide combinations; Herbicide efficacy; Herbicide evaluation; Herbicide formulations; Preemergence herbicides; Spray guns; Spraying methods; Taraxacum officinale; Trifolium repens
Trade Names:Trimec; Defendor; Dimension 2EW
Abstract/Contents:"Dithiopyr is a preemergence herbicide commonly used in the transition zone and northern U.S. for crabgrass control. Florasulam is a new broadleaf herbicide from Dow® AgroSciences under the trade name DefendorTM that is currently only sold as a liquid in a co-pack with Dimension® 2EW. Previous research with florasulam documented its ability to suppress bloom production of weeds such as dandelion and white clover. Currently, three-way products containing herbicides such as 2,4-D, MCPP, and dicamba are applied multiple times throughout the spring and summer to control broadleaf weeds. A single application of dithiopyr plus florasulam as a tank-mix could possibly control crabgrass and prolong or even prevent the use of three-way herbicides in cool-season turfgrasses. The objective of this study was to determine the appropriate application timings and tank-mixes of dithiopyr and florasulam for controlling crabgrass, dandelion, and white clover and suppressing their bloom production on a perennial ryegrass lawn with either a Chem-lawn turf spray gun or standard, 4-nozzle research boom. Smooth crabgrass was not observed at any time during this study, likely due to intense turfgrass competition and increased mowing heights. Herbicide and application main effects or interaction were not significant for the first 8 weeks of the study. At 8 WAIT, dandelion cover, control, and bloom reduction were significantly influenced by herbicide but not by application technique (p< 0.05). Similar trends were noted for white clover. At 12 WAIT, the herbicide by application technique interaction was significant for dandelion control (p< 0.05) but only the herbicide main effect was significant for clover control and bloom reduction for both. The interaction was likely due to dithiopyr at the low rate plus florasulam on March 3 followed by May 26 with or without Trimec controlling dandelion better when applied with the spray boom than the Chem-lawn gun. All other herbicides controlled dandelion equivalently regardless of application technique. At 15 and 18 WAIT, only the herbicide main effect was significant for dandelion and white clover control, and bloom reduction. At 15 WAIT, dandelion was controlled most by dithiopyr at 426 g ai/ha plus florasulam on April 28 with or without the addition of Trimec on May 26; however, dandelion control was significantly higher in plots treated with Trimec on May 26 than those without at 18 WAIT. These data suggest that a late spring application of Trimec may prolong dandelion regrowth better than florasulam alone. White clover was controlled by all treatments except dithiopyr applied alone at any rate, 18 WAIT. Based on these data, efficacy of dithiopyr plus florasulam treatments are not hindered by applying with a Chem-lawn spray gun instead of a boom sprayer calibrated for high spray outputs. Herbicide rates and timings were the major influence on dandelion and white clover cover, control, and bloom reduction. Florasulam appears to be effective for dandelion bloom suppression and short-term control; however, a late spring application of Trimec in addition to spring applications of florasulam controls dandelion and inhibits regrowth for a longer duration."
Language:English
References:0
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Cox, M. C., S. D. Askew, and D. Loughner. 2014. Chem-lawn spray gun vs. boom for dithiopyr plus florasulam performance in lawn turf. Proc. Annu. Meet. Northeast. Weed Sci. Soc. 68:p. 68.
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http://www.newss.org/proceedings/proceedings-2014.pdf#page=69
    Last checked: 10/05/2015
    Requires: PDF Reader
    Notes: Item is within a single large file
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