Full TGIF Record # 11861
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Web URL(s):http://www.newss.org/proceedings/proceedings_1987_vol41.pdf#page=238
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Publication Type:
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Report
Content Type:Abstract or Summary only
Author(s):Jagschitz, J. A.; Sawyer, C. D.
Author Affiliation:Dept. Plant Sciences, University of Rhode Island, Kingston, RI.
Title:Postemergence Control of Spurge, Violet and Oxalis in Turf
Meeting Info.:Held: January 6-8, 1987, Williamsburg, VA.
Source:Proceedings of the 1987 Annual Meeting of the Northeastern Weed Science Society. Vol. 41, 1987, p. 238-239.
Publishing Information:Ithaca, N. Y. : Northeastern Weed Science Society
# of Pages:2
Keywords:TIC Keywords: Postemergence herbicides; Euphorbia supina; Viola; Oxalis; Weed control; Application rates; Application timing; Agrostis canina; Festuca rubra subsp. rubra; Agrostis; Picloram; Fluroxypyr
Abstract/Contents:"Prostrate spurge (Euphorbia supina Raf.), oxalis (Oxalis spp.) and violet (Viola spp.) are difficult to control weeds in turfgrass. Eight trials were conducted over several years to evaluate herbicides, alone and in combination, for control of these weeds. The herbicides, rates and dates of application are shown in Table 1. Treatments were applied to replicated plots as sprays in water at the rate of 50 to 75 gallons per acre. No rainfall occurred within 36 hours following treatments. One of the three spurge trials was on a velvet bentgrass putting green and all other trials were on lawns with the grasses indicated in the Table. Percent control determinations were computed by comparing initial and final estimates of weed cover with adjustments made to account for changes in untreated plots. The time interval between treatment and control is shown in the Table. Turf injury estimates were made periodically throughout the tests. Results for control of spurge, violet and oxalis are presented in Table 1. Percent control of 85% or higher was considered excellent control. The only treatment to cause objectionable turf injury was 2,4-D + triclopyr applied to the velvet bentgrass putting green. Spurge Control - In the putting green test bromoxynil alone and in combination with dicamba, dichlorprop, mecoprop or triclopyr provided excellent control. 2,4-D + triclopyr was also effective but injured bentgrass. In the two lawn tests 2,4-D combinations with dichlorporp or triclopyr gave excellent control, while in one of the two tests bromoxynil (2 lb rate) was effective. Less than excellent control was obatined from bromoxynil combinations, 2,4-D, and 2,4-D combinations with dicamba, fluroxypyr, mecoprop, or dicamba + mecoprop. Violet control - 2,4-D + picloram provided excellent control in both May and September trials. Two applications of 2,4-D + triclopyr gave excellent control in September. Violet appears to be more susceptible to herbicides applied in September than in May. Fluroxypyr, 2,4-D + dichlorprop and 2,4-D + mecoprop + dicamba provided less than excellent control. Oxalis control - Combinations of 2,4-D with dichlorprop or triclopyr provided excellent control in June and August trials. 2,4-D + fluroxypyr, used only in August, gave effective control. The combination of 2,4-D + mecoprop + dicamba was effective in August, but not in June. Bronomynil alone, bromoxynil plus dicamba or mecoprop, 2,4-D and 2,4-D plus dicamba or mecoprop, used only in the June study, provided less than excellent control. In these weed control studies the amine formulations of 2,4-D plus either dichlorprop or triclopyr performed quite similar to the esther formulations."
Language:English
References:0
Note:Table
This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Jagschitz, J. A., and C. D. Sawyer. 1987. Postemergence Control of Spurge, Violet and Oxalis in Turf. Proc. Annu. Meet. Northeast. Weed Sci. Soc. 41:p. 238-239.
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http://www.newss.org/proceedings/proceedings_1987_vol41.pdf#page=238
    Last checked: 07/25/2013
    Requires: PDF Reader
    Notes: Item is within a single large file
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