Full TGIF Record # 33816
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Publication Type:
i
Report
Content Type:Abstract or Summary only
Author(s):Briggs, J. A.; Riley, M. L.; Whitwell, T.
Author Affiliation:Clemson University, Clemson, SC 29631
Title:Turfgrass for remediating herbicide content of runoff water - Preliminary studies
Meeting Info.:Dallas, TX: January 17-19, 1994
Source:Southern Weed Science Society Proceedings. Vol. 47, 1994, p. 201.
Publishing Information:Champaign, IL: Southern Weed Science Society.
# of Pages:1
Keywords:TIC Keywords: Zoysia japonica; Isoxaben + oryzalin; Runoff water; Water pollution; Pollutant absorption; Environmental benefits; Nurseries
Cultivar Names:Meyer
Abstract/Contents:"Herbicides have been reported to leave containerized nursery sites in runoff water. Grassed buffer strips have reduced the concentration of pesticides in runoff water from field crops. The objective of this study was to obtain preliminary information on the effect of grassed water ways on runoff water containing nursery herbicides (isoxaben and oryzalin). Miniature model grassed water ways were used to determine the the effect of grass sod on runoff water containing herbicide. Twelve model waterways (20 X 1.5 ft) were constructed at the South Carolina Botanical Gardens on a 3% slope. Six models were sheet metal trays, three lined with Meyer zoysia grass, (Zoysia japonica 'Meyer') and three empty. The other six models were Cecil clay loam ditches with three containing the zoysia grass sod and three without grass. Isoxaben and oryzalin from Snapshot DF (60% oryzalin and 20% isoxaben) were disolved in methanol and diluted with 20 gal water to obtain a concentration of 9 ppm oryzalin and 3 ppm isoxaben. The herbicides were pumped on the upper sloped end of the waterway at the rate of 3.3 gallon per minute and water samples were taken as they entered the water way. The first and final 2.5 gallon runoff, and the varying intermediate volumes were sampled for analysis. The experimental design was a randomized complete block with 3 replications. At 15 and 30 days after the initial treatment (DAT), twenty gallons of water were applied to each model and a composite runoff water sample was taken. The samples were filtered and the herbicides extracted from the water onto a C-18 solid phase column. Following elution with 2 ml acetone, analysis was performed by HPLC, UV detector. [Filter] papers were shaken in methanol and extracts eluted similarly with analysis by HPLC. Runoff volume was less for the grassed treatments. Almost all of the applied water was recovered from the metal trays and clay ditches without grass (19.5 and 17 gallons respectively). In the grassed waterways, 12 and 6 gallons were measured from the ditches and metal trays respectively. For isoxaben and oryzalin, the grass sod significantly reduced the volume of herbicide leaving the waterways in both the metal tray and clay ditch treatments. The concentrations of herbicides were reduced most by the grassed treatments in the first 2.5 gallon sample of runoff. At 15 and 30 DAT, more of both herbicides was detected in the samples from the metal tray with grass and the bare ditch, than from the empty metal tray or ditch with grass. Future work will focus on refining this technique."
Language:English
References:0
See Also:Other items relating to: FILTER
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Briggs, J. A., M. L. Riley, and T. Whitwell. 1994. Turfgrass for remediating herbicide content of runoff water - Preliminary studies. South. Weed Sci. Soc. Proc. 47:p. 201.
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MSU catalog number: SB 611 .S6 v.47
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