Full TGIF Record # 226829
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Web URL(s):http://www.swss.ws/wp-content/uploads/docs/2011 Proceedings-SWSS.pdf#page=401
    Last checked: 08/06/2013
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Publication Type:
i
Report
Author(s):Strahan, R. E.; Beasly, J. S.; Borst, S. M.
Author Affiliation:Louisiana State University AgCenter, Baton Rouge
Title:Troublesome weed management in southern turfgrass with thiencarbazon, iodosulfuron, and dicamba
Section:Posters: Weed management in turf
Other records with the "Posters: Weed management in turf" Section
Meeting Info.:San Juan, Puerto Rico: January 24-26, 2011
Source:2011 Proceedings, Southern Weed Science Society. Vol. 64, 2011, p. 293.
Publishing Information:Champaign, Illinois: Southern Weed Science Society
# of Pages:1
Keywords:TIC Keywords: Atrazine; Carfentrazone-ethyl + 2,4-D + Mecoprop + Dicamba; Dichondra; Eremochloa ophiuroides; Herbicide evaluation; Hydrocotyle umbellata; Paspalum dilatatum; Stenotaphrum secundatum; Tank mix; Thiencarbazone + iodosulfuron + dicamba
Trade Names:Celsius; Speed Zone
Abstract/Contents:"Iodosulfuron, thiencarbazone, and dicamba, combined in premix called Celsius, is a new herbicide from Bayer released in 2010. The herbicide has both broadleaf and grass activity and good safety in southern turfgrass species such as St. Augustinegrass (Stenotaphrum secundatum) and centipedegrass (Eremochloa ophiuroides). Dollarweed (Hydrocotile) and dichondra (Dichondra repens) are low-growing broadleaf weeds that infest weakened turfgrass. Dallisgrass (Paspalum dilatatum) is ranked as the number two weed problem in Louisiana turf and has become an increasingly serious weed due to the loss of MSMA and lack of effective chemical control alternatives. These three species are among the most common perennial weeds infesting turfgrass systems in the Southeastern United States. Four separate field experiments were conducted at the Burden Research Center in Baton Rouge, LA in 2010 to evaluate Celsius activity on dollarweed, dichondra, and dallisgrass in mixed southern turfgrass species. For dollarweed, a spring and fall study was conducted. The spring dollarweed study was initiated on May 1, whereas, the fall study was initiated on October 25. The dichondra study was initiated on October 25. The dallisgrass trial began on June 7. Herbicides were applied with a CO2 pressurized backpack sprayer equipped with 11003 XR flat fan nozzles that delivered 30 GPA at 23 psi. For the dollarweed trials, treatments included Celsius at 3 different rates, 3.6, 5.0, 7.2 oz/A, and 3.6 fb 3.6 oz/A (3 weeks after the initial), atrazine at 32 oz/A, Speed Zone Southern (2,4-D, dicamba, mecoprop, carfentrazone) at 60 oz/A, Speed Zone Southern + atrazine at 60 and 32 oz/A, respectively and an untreated check. The dichondra trial treatments included Celsius at 5.0, 7.2 oz/A, and 3.6 fb 3.6 oz/A (3 weeks after the initial), Speed Zone Southern at 60 oz/A, and atrazine at 32 oz/A. The dallisgrass trial treatments were Celsius at 3.6, 5.0, 7.2 oz/A, and 3.6 fb 3.6 oz/A (3 weeks after the initial), and MSMA fb MSMA at 2 lb/A. The experiments were conducted in 4 separate areas at Burden Research Center on marginal quality non-irrigated centipedegrass/St. Augustinegrass mix with a heavy natural population of weeds tested. The dallisgrass trial was conducted in an area with near 100% dallisgrass coverage with very little desirable turfgrass present. All plots in the trials were mowed as needed to maintain 2.5 inch height. Plot size was 4 ft x 7 ft. Visual ratings of percent weed control and turf injury data were collected weekly. The experiment was conducted as a randomized complete block with 4 replications. Data were subjected to analysis of variance (P=0.05) and means were separated using Fishers LSD. For the spring dollarweed study, Celsius applied at 3.6, 5.0, and 7.2 oz provided 60 to 75% dollarweed control 58 DAT. Celsius applied twice at 3.6 oz/A controlled 85% of the dollarweed. Speed Zone Southern and atrazine controlled dollarweed 80%. A tank-mix of Speed Zone Southern + atrazine provided 100% control. When the study was repeated in the fall, Celsius at 3.6, 5.0, and 7.2 oz provided 70 to 85% dollarweed control 63 DAT. Celsius applied twice at 3.6 oz/A controlled 95% of the dollarweed. In the fall dichondra study, Celsius applied at 5.0 and 7.2 oz/A provided 35 and 50% control 63 DAT. Celsius applied twice at 3.6 oz/A controlled 70% of the dichondra. Speed Zone Southern and atrazine controlled dichondra 80% and 90%, respectively. Dallisgrass control did not exceed 35% control with a single application of Celsius regardless of rate used in the dallisgrass study. However, Celsius applied twice at 3.6 oz/A controlled 50% of the dallisgrass when applied 3 weeks apart, 45 days after the initial treatment. MSMA applied twice provided 80% control."
Language:English
References:0
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Strahan, R. E., J. S. Beasly, and S. M. Borst. 2011. Troublesome weed management in southern turfgrass with thiencarbazon, iodosulfuron, and dicamba. South. Weed Sci. Soc. Proc. 64:p. 293.
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http://www.swss.ws/wp-content/uploads/docs/2011 Proceedings-SWSS.pdf#page=401
    Last checked: 08/06/2013
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    Notes: Item is within a single large file
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