Full TGIF Record # 309571
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Web URL(s):https://scisoc.confex.com/scisoc/2019am/meetingapp.cgi/Paper/118570
    Last checked: 12/03/2019
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Publication Type:
Content Type:Abstract or Summary only
Author(s):Henry, Gerald M.; Tucker, Kevin; Brosnan, James T.; Breeden, Gregory K.
Author Affiliation:Henry: University of Georgia-Athens, Athens, GA; Tucker: Crop and Soil Sciences, University of Georgia-Athens, Athens, GA; Brosnan and Breeden: Department of Plant Sciences, University of Tennessee-Knoxville, Knoxville, TN
Title:Spray volume and application rate of trifloxysulfuron affects long-term dallisgrass control
Section:C05 turfgrass science
Other records with the "C05 turfgrass science" Section

Turfgrass pest management poster: Diseases, insects, weeds (includes student competition)
Other records with the "Turfgrass pest management poster: Diseases, insects, weeds (includes student competition)" Section
Meeting Info.:San Antonio, Texas: November 10-13, 2019
Source:ASA, CSSA and SSSA International Annual Meetings. 2019, p. 118570.
Publishing Information:[Madison, Wisconsin]: [American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America]
# of Pages:1
Keywords:TIC Keywords: Ammonium sulfate; Application rates; Cynodon; Dallisgrass control; Herbicide evaluation; Methylated seed oil; Percent living ground cover; Spray volumes; Trifloxysulfuron
Trade Names:Tribute Total; Monument
Abstract/Contents:"Dallisgrass (Paspalum dilatatum Poir.) is a problematic rhizomatous perennial weed of managed turfgrass throughout the southern United States. The presence of dallisgrass reduces turfgrass aesthetics and playability due to wide leaf blades, a clump-like growth habit, and prolific seedheads. Field experiments were conducted at the Pine Hills Golf Club (PHGC) in Winder, GA and East Tennessee AgResearch & Education Center (ETREC) in Knoxville, TN during 2016 and 2017. Research was conducted on mature infestations of dallisgrass present within bermudagrass (Cynodon spp.). Plots (1.5 x 1.5 m) were arranged in a randomized complete block (RCB) design with 4 replications. Herbicides were applied with a CO2 powered backpack sprayer calibrated to deliver either 407, 814, or 1,628 L ha-1 at 221 kPa. Herbicide treatments were initiated on September 23, 2016 at PHGC and September 20, 2016 at ETREC. Sequential applications were made on October 20, 2016 and April 7, 2017 at PHGC with sequential applications made on October 17, 2016 and April 4, 2017 at ETREC. Treatments consisted of Monument (trifloxysulfuron) at 28, 56, and 112 g ai ha-1 applied alone or in combination with A13617 at 35, 70, and 140 g ai ha-1, respectively, at 407, 814, and 1,628 L ha-1, respectively; and Tribute Total (thiencarbazone + foramsulfuron + halosulfuron) at 136 g ai ha-1 plus ammonium sulfate (AMS) at 1.68 kg ha-1 at 407 L ha-1. All treatments were applied with a methylated seed oil (MSO) at 0.5% v/v. An untreated check was added for comparison. Visual ratings of % dallisgrass cover were recorded at 0, 6, and 32 weeks after initial treatment (WAIT) and converted to % control by comparing back to % cover ratings at trial initiation (0 WAIT). Analysis was conducted separately for locations. Control data were subjected to analysis of variance in SAS using error partitioning appropriate to a RCB design in the general linear models procedure. Treatment means were separated using Fisher's protected least significant difference (LSD) test at α = 0.05. Initial dallisgrass control (6 WAIT) was greatest in response to treatments applied at spray volumes of 814 and 1,628 L ha-1 at both locations (≥ 64%, regardless of treatment). Control with Tribute Total 6 WAIT was 57 to 71%, regardless of location. Long-term control (32 WAIT) was greatest in response to Monument at 112 g ai ha-1 + A13617 at 140 g ai ha-1 + MSO sprayed at a volume of 1,628 L ha-1 (90 to 92%, regardless of location). All other Monument treatments that were sprayed at volumes of 407 and 814 L ha-1 resulted in dallisgrass control ≤ 78%, regardless of location 32 WAIT. Control with Tribute Total 32 WAIT was only 40% at PHGC, while control at ETREC was 84%. Use of higher rates of Monument and higher spray volumes improved dallisgrass control. This may be attributed to an increase in dallisgrass coverage during application."
Note:This item is an abstract only!
"Poster #1635"
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Henry, G. M., K. Tucker, J. T. Brosnan, and G. K. Breeden. 2019. Spray volume and application rate of trifloxysulfuron affects long-term dallisgrass control. Agron. Abr. p. 118570.
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