Full TGIF Record # 227360
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Web URL(s):http://www.swss.ws/wp-content/uploads/docs/2013 Proceedings-SWSS.pdf#page=151
    Last checked: 08/12/2013
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Author(s):Campbell, T.; Brosnan, J.; Vargas, J. J.
Author Affiliation:University of Tennesse, Knoxville, TN
Title:Tolerance of various ornamentals to postemergence applications of amicarbazone and flucarbazone
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Meeting Info.:Houston, Texas: January 28-30, 2013
Source:Proceedings of the Southern Weed Science Society: 66th Annual Meeting. Vol. 66, 2013, p. 64.
# of Pages:1
Publishing Information:Champaign, Illinois: Southern Weed Science Society
Keywords:TIC Keywords: Amicarbazone; Bentazon; Flucarbazone; Herbicide evaluation; Herbicide resistance; Ornamental gardens; Weed control
Abstract/Contents:"Amicarbazone and flucarbazone are herbicides being evaluated for weed control in turf and ornamentals. Research was conducted in 2012 at the East Tennessee Research and Education Center (Knoxville, TN) evaluating the tolerance of ten landscape ornamental species to applications of amicarbazone, flucarbazone, and a commercial standard, bentazon. Ornamental species evaluated in this research included rose-of-sharon (Hibiscus syriacus), wintercreeper euonymus (Euonymus fortunei), 'Lynwood Gold' forsythia (Forsythia x intermedia), 'Knockout' rose (Rosa sp.), 'Natchez' crape myrtle (Lagerstroemia indica x L. faurei), autumn olive (Eleagnus umbellata), Virginia sweetspire (Itea virginica), buttonbush (Cephalanthus occidentalis), 'Flore-Pleno' fuzzy deutzia (Deutzia scabra), and Chinese dogwood (Cornus kousa). Rooted cuttings of each species were grown for six weeks in 3.8 L containers filled with 100% aged pine bark before being transplanted into in-ground field plots on 18 June 2012. Soil series of the field plots was a Sequatchie silt loam. Plant heights at transplanting were as follows: rose-of-sharon (8 to 25 cm), wintercreeper (10 to 28 cm), forsythia (10 to 28 cm), rose (15 to 20 cm), crape myrtle (15 cm), autumn olive (30 cm), Virginia sweetspire (38 to 61 cm), buttonbush (51 to 91 cm), deutzia (61 to 91 cm), and Chinese dogwood (51 to 91 cm). Treatments were arranged in a randomized complete block design with three replications and applied to plots (3 x 15 m) containing each species planted on a 1.5 m spacing. Treatments included post-directed applications of amicarbazone (49.5 and 446 g ha-1), flucarbazone (29 and 88 g ha-1), and bentazon (1120 g ha-1). Over-the-top applications of amicarbazone (980 g ha-1) and flucarbazone (29 g ha-1) were also evaluated. Flucarbazone treatments included a non-ionic surfactant at 0.25% v/v. All treatments were applied on 28 June 2012 using a CO2 powered boom sprayer calibrated to deliver 23 gpa using a 6504E nozzle at 60 psi. Both post-directed and over-the-top applications were made with this equipment. Ornamental injury was evaluated 14, 28 and 42 days after treatment (DAT) on a 0 (i.e., no injury) to 100% (i.e., complete plant death) scale relative to an untreated check. Ornamental injury was greatest 28 DAT and ranged from 2 to 18% for post-directed applications. Over-the-top applications of amicarbazone and flucarbazone were more injurious than those applied post-directed with injury ranging from 25 to 67% at 28 DAT. By 42 DAT, recovery was apparent as injury only ranged from 0 to 13% across all species regardless of application method. Results of this research indicate that the risk of ornamental injury with post-directed applications of amicarbazone and flucarbazone at the rates evaluated in this study is low, and that plants will outgrow injury after post-directed applications. Additionally, over-the-top applications of amicarbazone and flucarbazone can be more injurious than post-directed treatments and are not recommended at the rates evaluated in this study."
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ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Campbell, T., J. Brosnan, and J. J. Vargas. 2013. Tolerance of various ornamentals to postemergence applications of amicarbazone and flucarbazone. South. Weed Sci. Soc. Proc. 66:p. 64.
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http://www.swss.ws/wp-content/uploads/docs/2013 Proceedings-SWSS.pdf#page=151
    Last checked: 08/12/2013
    Requires: PDF Reader
    Notes: Item is within a single large file
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