Full TGIF Record # 225085
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Web URL(s):http://www.swss.ws/wp-content/uploads/docs/2005 Proceedings-SWSS.pdf#page=184
    Last checked: 07/18/2013
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Publication Type:
i
Report
Author(s):Stephenson, D. O. IV; Brecke, B. J.; Unruh, J. B.
Author Affiliation:University of Florida, Milton, FL
Title:Annual bluegrass (Poa annua) and lawn burweed (Soliva pterosperma) control in non-overseeded bermudagrass (Cynodon dactylon x C. transvaalensis) in Florida
Section:Weed management in turfgrass
Other records with the "Weed management in turfgrass" Section
Meeting Info.:Charlotte, North Carolina: January 24-26, 2005
Source:Proceedings of the 58th Annual Meeting of the Southern Weed Science Society. Vol. 58, 2005, p. 109.
Publishing Information:Champaign, Illinois: Southern Weed Science Society
# of Pages:1
Keywords:TIC Keywords: Cynodon dactylon x Cynodon transvaalensis; Herbicide efficacy; Herbicide evaluation; Poa annua control; Soliva sessilis; Weed control
Geographic Terms:Florida
Abstract/Contents:"Annual bluegrass (Poa annua) and lawn burweed (Soliva pterosperma) are two of the most common and troublesome weeds in turfgrass in Florida. Left uncontrolled, they can decrease quality by invading desired turfgrass. An experiment was conducted in 2004 at the West Florida Research and Education Center near Jay, FL to document control of annual bluegrass and lawn burweed by trifloxysulfuron-sodium alone or tank-mixed with glyphosate or diquat. Treatments were applied March 17, 2004 to dormant Tifsport bermudagrass included: 1) trifloxysulfuron-sodium (17 g/ha); 2) glyphosate (840 g/ha); 3) diquat (280 g/ha); 4) trifloxysulfuron-sodium + glyphosate (17 + 840 g/ha); 5) trifloxysulfuron-sodium + diquat (17 + 280 g/ha); 6) formasulfuron (18 g/ha); and 7) nontreated. Annual bluegrass and lawn burweed control were visually rated 1 and 5 wk after treatment (WAT). Bermudagrass injury was visually rated 1, 5, and 11 WAT. Data were subjected to ANOVA and means separated using Fisher's Protected LSD at p = 0.05. Trifloxysulfuron-sodium controlled annual bluegrass and lawn burweed greater than 85% 5 WAT. Glyphosate and diquat provided excellent control of both weeds 1 WAT, but diquat control decreased to 19% 5 WAT. Trifloxysulfuron-sodium and formasulfuron injured bermudagrass less than 15% at all rating dates. All treatments containing glyphosate and diquat injured bermudagrass greater than 49% 1 WAT, indicating that bermudagrass was not dormant at time of herbicide application. Due to observed bermudagrass injury and emergence of southern crabgrass (Digitatia ciliaris) 9 WAT, which was differentiated by herbicide treatment, bermudagrass and southern crabgrass data was collected 9 and 11 WAT. Bermudagrass density and southern crabgrass plot cover were rated 9 WAT. Bermudagrass visual injury and southern crabgrass visual control were rated 11 WAT. No differences in bermudagrass density were documented 9 WAT. Southern crabgrass cover following glyphosate, diquat, and formasulfuron was 80% or greater 9 WAT which was equal to the nontreated check. Cover was reduced to 58% following trifloxysulfuron-sodium alone or in combination with glyphosate or diquat, indicating possible residual control of southern crabgrass by trifloxysulfuron-sodium. Southern crabgrass control 11 WAT by treatments that contained trifloxysulfuron-sodium was greater than any other treatment. Trifloxysulfuron-sodium + glyphosate or diquat controlled southern crabgrass less than trifloxysulfuronsodium alone. Differences may have been due to glyphosate and diquat injuring bermudagrass, thus decreasing bermudagrass competitive ability with southern crabgrass and possible residual control by trifloxysulfuron-sodium. Trifloxysulfuron-sodium alone on in combination with glyphosate or diquat is effective for control of annual bluegrass and lawn burweed. However, to avoid bermudagrass injury, glyphosate or diquat should not be applied to non-dormant bermudagrass. Data indicate that trifloxysulfuron-sodium may provide residual control of southern crabgrass."
Language:English
References:0
Note:"The changing world of weed science"
This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Stephenson, D. O. IV, B. J. Brecke, and J. B. Unruh. 2005. Annual bluegrass (Poa annua) and lawn burweed (Soliva pterosperma) control in non-overseeded bermudagrass (Cynodon dactylon x C. transvaalensis) in Florida. South. Weed Sci. Soc. Proc. 58:p. 109.
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http://www.swss.ws/wp-content/uploads/docs/2005 Proceedings-SWSS.pdf#page=184
    Last checked: 07/18/2013
    Requires: PDF Reader
    Notes: Item is within a single large file
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