Full TGIF Record # 224650
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Web URL(s):http://www.ncwss.org/proceed/NCWSS-2012-Proceedings.pdf#page=44
    Last checked: 07/15/2013
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Author(s):Campbell, Tyler; Brosnan, James; Vargas, Jose J.
Author Affiliation:The University of Tennessee, Knoxville, TN
Title:Tolerance of various landscape ornamentals to postemergence applications of amicarbazone and flucarbazone
Other records with the "Horticulture/ornamentals" Section
Meeting Info.:St. Louis, MO: December 10-13, 2012
Source:67th Annual Meeting of the North Central Weed Science Society. Vol. 67, 2012, p. 44.
# of Pages:1
Publishing Information:Champaign, Illinois: North Central Weed Science Society
Keywords:TIC Keywords: Acetolactate synthase; Amicarbazone; Bentazon; Euonymus fortunei; Flucarbazone; Herbicide resistance; Ornamental plants; Photosystem II
Cultivar Names:Knockout; Lynwood Gold; Natchez; Flore-Pleno
Abstract/Contents:"The photosystem II inhibitor amicarbazone and the acetolactate synthase inhibitor flucarbazone are being evaluated for weed control in turf and ornamentals. In 2012, tolerance of ten ornamental species was evaluated following applications of amicarbazone, flucarbazone, and bentazon. Ornamental species 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 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 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 (OT) 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 postdirected 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."
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ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Campbell, T., J. Brosnan, and J. J. Vargas. 2012. Tolerance of various landscape ornamentals to postemergence applications of amicarbazone and flucarbazone. Proc. North Cent. Weed Sci. Soc. 67:p. 44.
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    Last checked: 07/15/2013
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    Notes: Item is within a single large file
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