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Web URL(s):http://www.swss.ws/wp-content/uploads/docs/2013 Proceedings-SWSS.pdf#page=335
    Last checked: 08/12/2013
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Author(s):Henry, G. M.; Straw, C. M.; Moore-Kucera, J.; Jackson, A.; Cooper, T.; Beck, L.
Author Affiliation:Henry and Straw: University of Georgia, Athens, GA; Moore-Kucera, Jackson, Cooper and Beck: Texas Tech University, Lubbock, TX
Title:MSMA leaching potential in a simulated turfgrass system
Section:Weed management in turf
Other records with the "Weed management in turf" Section
Meeting Info.:Houston, Texas: January 28-30, 2013
Source:Proceedings of the Southern Weed Science Society: 66th Annual Meeting. Vol. 66, 2013, p. 248.
Publishing Information:Champaign, Illinois: Southern Weed Science Society
# of Pages:1
Keywords:TIC Keywords: Arsenic residues; Comparisons; Leaching potential; MSMA; Soil properties; Soil water movement
Abstract/Contents:"Since the 1960s, monosodium methanearsonate (MSMA), an organic form of arsenic, has been used to manage several weed species in warm-season turf. In its organic form [monomethylarsonic acid (MMA) and dimethylarsinic acid (DMA)], arsenic is relatively non-toxic. However, inorganic arsenic species [arsenite (AsIII) and arsenate (AsV)] can be highly toxic. Transformation and translocation of MSMA in soil is highly dependent upon soil properties and environmental conditions. Experiments were conducted at the Plant and Soil Science greenhouses in Lubbock, TX during spring of 2012 to evaluate the influence of soil texture on the transformation and translocation of MSMA in leachate collected from a simulated turfgrass environment. Pots (30 cm diameter, 0.03 yd3) were lined with 20x20 mesh screen and filled with sandy clay loam or sand soil. 'Tifsport' hybrid bermudagrass sod (10-years old) was cut to a depth of 5 cm, washed of all soil, and transplanted into pots on February 27, 2012. Sod was placed flush with the edge of each pot and maintained at a height of 0.6 cm. A starter fertilizer (7N-7P2O5-7K2O) was applied at transplant at a rate of 24 kg N ha-1. Greenhouse temperatures were maintained at 34/26 C (day/night) with average midday solar radiation ranging from 636 to 754 μmol m-2 s-1. Irrigation (3.8 cm of water wk-1) was supplied through an overhead irrigation system. Soil and water samples were taken prior to trial initiation and analyzed for background arsenic levels. Bermudagrass grew and acclimated in the greenhouse for one month. MSMA (2.5 kg ai ha-1) was applied on April 3, 2012 with a CO2 backpack sprayer equipped with XR8004VS nozzles calibrated to deliver 375 L ha-1 at 221 kPa. Leachate was collected 1, 3, 7, and 14 days after treatment (DAT); and analyzed for AsIII, AsV, monomethylarsonic acid (MMA), and dimethlyarsinic acid (DMA). AsIII and MMA concentrations of 27 to 97 and 20 to 89 ppb, respectively, were recorded for several sandy clay loam leachates 1 DAT. Concentrations were 12 to 19 and 11 to 12 ppb, respectively, 3 DAT. AsV and DMA concentrations of 12 to 66 and 15 to 179 ppb, respectively, were recorded for several sand leachates 7 DAT. AsIII, AsV, MMA, and DMA concentrations of 12 to 30, 14 to 96, 13 to 288, and 32 to 73 ppb, respectively, were recorded for several sand leachates 14 DAT. In general, higher concentrations of arsenic species were detected in earlier leachate concentrations (1 to 3 DAT) of sandy clay loam soil, while higher concentrations were observed in later leachate collections (7 to 14 DAT) from sand. This may be explained by preferential water flow."
Language:English
References:0
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Henry, G. M., C. M. Straw, J. Moore-Kucera, A. Jackson, T. Cooper, and L. Beck. 2013. MSMA leaching potential in a simulated turfgrass system. South. Weed Sci. Soc. Proc. 66:p. 248.
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http://www.swss.ws/wp-content/uploads/docs/2013 Proceedings-SWSS.pdf#page=335
    Last checked: 08/12/2013
    Requires: PDF Reader
    Notes: Item is within a single large file
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