Full TGIF Record # 224695
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Web URL(s):http://www.swss.ws/wp-content/uploads/docs/2003%20Proceedings-SWSS.pdf#page=328
    Last checked: 07/16/2013
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Author(s):Burnelli, B. T.; McCarty, L. B.; Cox, C. J.; Estes, A. E.
Author Affiliation:Department of Horticulture, Clemson University, Clemson, SC
Title:Postemergence Poa annua control in dormant bermudagrass
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. 241.
Publishing Information:Champaign, Illinois: Southern Weed Science Society
# of Pages:1
Keywords:TIC Keywords: Application timing; Cynodon dactylon; Dormancy; Herbicide evaluation; Herbicide timing; Poa annua control; Postemergence weed control
Abstract/Contents:"Poa annua control in dormant bermudagrass is commonly performed in non-overseeded golf course fairways, roughs, and home lawns with non-selective herbicides. The growth habit and noxious seedhead production of Poa annua reduces the quality and aethestic value in non- overseeded areas of golf courses and home lawns during winter and spring months. Herbicide use and application timing is critical for long term Poa annua control throughout the spring season without injuring the bermudagrass. The objective of this research was to control Poa annua following a variety of herbicide applications in December and February. Two Poa annua control studies were performed during the winter and spring of 2001-2002 on dormant common bermudagrass (Cynodon dactylon ). In study one, treatment applications were made on December 20, 2001 and study two on February 5, 2002. Each study was performed on a golf course rough in Pendleton, SC. Treatments included single applications of: atrazine and simazine at 1.0 lbs a/A (Dec) and 2.0 lbs ai/A (Feb), Reward 2 EC (diquat) + Optima (NIS) at 0.5 lbs ai/A + 0.25% v/v, Round-Up Pro 4 EC (glyphosate) at 0.5 lbs ai/A, Finale 1 SC (glufosinate) at 1.5 lbs ai/A, Round-Up Pro + Envoy 0.94 EC (clethodim) at 0.5 + 0.25 lbs ai/A, Finale + Round-Up Pro at 1.5 + 0.5 lbs ai/A, Finale + Envoy + Optima at 1.5 + 0.25 lbs ai/A + 0.25% v/v, Kerb 50 WP (pronamide) at 1.5 lbs ai/A, Image 1.5 LC (imazaquin) at 0.5 lbs ai/A, metsulfuron 60 DF at 0.025 lbs ai/A, TranXit (rimsulfuron) at 0.031 lbs ai/A, Velocity 80 WP (bispyribac-sodium) at 0.035 lbs ai/A, sulfosulfuron 75 DG at 0.02 lbs ai/A, sulfosulfuron 75 DG + NIS at 0.02 lbs ai/A + 0.5% v/v, and flazasulfuron 25 DG at 0.045 lbs ai/A. Visual ratings were taken weekly. Poa annua control was rated on a 0-100% scale with 0%=worst and 100%=best. Control < 80% was deemed commercially unacceptable control. In the December application study, at 5 weeks after treatment (WAT) only Reward provided > 90% Poa annua control. By 10 WAT, all treatments including non-selective herbicides provided 100% Poa annua control. TranXit and Flazasulfuron provided . 70% control. All other treatment application provided < 50% Poa annua control. In the February application study, at 5 WAT, all treatments containing Finale provided from 95-100% Poa annua control. All other treatments provided < 50% Poa annua control. By 10 WAT, best Poa annua control (> 90%) followed applications of Finale + Envoy, Kerb, and the increased rates of simazine and atrazine. Finale alone and Finale + Round-Up Pro provided 85 and 70% Poa annua control, respectively. All other treatments provided < 70% Poa annua control at 10 WAT. In summary, good long-term Poa annua control followed applications containing Finale when applied both in December and February. Finale + Envoy was the only treatment providing > 90% Poa annua control at both application timings. Treatments containing Reward were successful controlling Poa annua when applied in December. February applications of Reward provided 0% Poa annua control at 10 WAT. Triazine herbicides provided > 90% control in the February study after the rate was increased to 2.0 lbs ai/A. Additionally, Kerb showed 95% Poa annua control when applied in February and only 50% control in December at 10 WAT. Research will continue on long-term Poa annua control with varying pesticide combinations, timings, and rates. Sulfonylurea herbicides may potentially open new avenues of Poa annua control in dormant bermudagrass."
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):
Burnelli, B. T., L. B. McCarty, C. J. Cox, and A. E. Estes. 2003. Postemergence Poa annua control in dormant bermudagrass. South. Weed Sci. Soc. Proc. 56:p. 241.
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http://www.swss.ws/wp-content/uploads/docs/2003%20Proceedings-SWSS.pdf#page=328
    Last checked: 07/16/2013
    Requires: PDF Reader
    Notes: Item is within a single large file
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