Full TGIF Record # 224677
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Web URL(s):http://www.swss.ws/wp-content/uploads/docs/2003%20Proceedings-SWSS.pdf#page=325
    Last checked: 07/16/2013
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i
Report
Author(s):Gregg, M. F.; McCarty, L. B.; Estes, A. G.
Author Affiliation:Department of Horticulture, Clemson University, Clemson, S.C.
Title:Selective crabgrass removal from tall fescue and zoysiagrass
Section:Soil and environmental aspects of weed science
Other records with the "Soil and environmental aspects of weed science" Section
Meeting Info.:Houston, Texas: January 27-29, 2003
Source:Proceedings: Southern Weed Science Society: 56th Annual Meeting. Vol. 56, 2003, p. 238.
Publishing Information:Champaign, Illinois: Southern Weed Science Society
# of Pages:1
Keywords:TIC Keywords: Crabgrass control; Festuca arundinacea; Herbicide evaluation; Herbicide resistance; Postemergence weed control; Selective thinning; Zoysia
Abstract/Contents:"Crabgrass (Digitaria spp.) is a common summer annual in all turfgrasses. Crabgrass often thrives in closely mowed areas such as home lawn s, sports fields, and golf course fairways and roughs. However, selective control attempts in tall fescue and zoysiagrass often provides inadequate control and/or excessive turf phytotoxicity. The objectives of these studies were to: (1) evaluate herbicides for postemergence control of crabgrass; (2) turf tolerance in tall fescue and zoysiagrass turf. Trials were evaluated in Clemson, S.C., at Clemson University. 'Barlexas' tall fescue was maintained at 7.62 cm and 'Meyer' zoysiagrass maintained at 1.43 cm. Plot size for crabgrass removal in tall fescue measured 2 x 2 meters with three replications and 1.5 x 1.5 meters for zoysiagrass with three replications. Experimental design for each study was a randomized complete block. Data was subjected to ANOVA with means separated using Fisher's LSD test with α =0.05. Crabgrass control had a duplicate treatment list for tall fescue and zoysiagrass with a single application applied August 13th, 2002. Treatments included: Fusilade T&O II 2 EC (fluziafop-butyl) at 0.09 lb ai/A; Acclaim Extra 0.57 L (fenoxaprop) at 0.11 lb ai/A; MSMA 6.6 L (monosodium acid methanearsonate) at 1.5 lb ai/A; flazasulfuron 25 DG at 0.05 lb ai/A + Induce L (LI-700) at 0.25% v/v; and Drive 75 DF (quinclo rac) at 0.75 lb ai/A. Treatments were applied with a CO2 pressurized sprayer calibrated to deliver 187 Liters/hectare. Crabgrass control and turfgrass injury were visually rated September 3rd, 2002, 3 weeks after treatment (WAT) and September 23rd, 2002, 6 WAT. Control and turfgrass injury was rated on a 0-100%scale with 0=no control or injury, and 100% = complete control or total death to turf. Value of 30% was considered maximum commercially acceptable level for turf injury. No products provided > 50% control in tall fescue at 3 WAT. However, 6 WAT, Acclaim Extra at 0.11 lb ai/A provided >= 65 % crabgrass control. Tall fescue injury (>= 30%) was noted 3 WAT with flazasulfuron at 0.05 lb ai/A. At 6 WAT, complete death of tall fescue was observed with flazasulfuron treatment. All treatments provided between 65-85% crabgrass control in zoysiagrass 3 WAT. At 6 WAT, Fusilade T&O II at 0.09 lb ai/A, Acclaim Extra at 0.11 lb ai/A, and Drive at 0.75 lb ai/A provided best crabgrass control (70, 75, and 78%, respectively). Zoysiagrass injury was acceptable (< 30%) for all treatments. In conclusion, a single application of Acclaim Extra at 0.11 lb ai/A provided best crabgrass control with most tolerance in tall fescue. Flazasulfuron at 0.05 lb ai/A caused complete death to tall fescue. Drive at 0.75 lb ai/A provided best crabgrass control in zoysiagrass when applied once. Future research will continue to investigate the economics of control options, experimental herbicides, different rates and timings, and sequential applications."
Language:English
References:0
Note:"Invasive weeds: Real or imagined threat?"
This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Gregg, M. F., L. B. McCarty, and A. G. Estes. 2003. Selective crabgrass removal from tall fescue and zoysiagrass. South. Weed Sci. Soc. Proc. 56:p. 238.
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http://www.swss.ws/wp-content/uploads/docs/2003%20Proceedings-SWSS.pdf#page=325
    Last checked: 07/16/2013
    Requires: PDF Reader
    Notes: Item is within a single large file
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