Diazinon Accumulation and Dissipation in Oryza sativa L. Following Simulated Agricultural Runoff Amendment in Flooded Rice Paddies
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Flooded post-harvest rice paddies were examined as systems for reducing diazinon (organophosphate insecticide) concentrations in stormwater runoff. Two paddies were cultivated in Oryza sativa L. and amended with a 3-h simulated stormwater diazinon runoff event. Initial diazinon adsorption peaked at 347 and 571 μg kg−1 (3% mass load reduction) for mean above-ground plant tissue concentrations in each pond, respectively. Subsequent senescence of above-ground tissue showed significant decreases in tissue mass (r 2 = 0.985) and adsorbed diazinon mass (90 ± 4% and 82 ± 1%) within 1 month of amendment. There were no corollary increases in water column diazinon concentrations. Furthermore, control O. sativa tissue placed within the treatment ponds had below-detectable levels of diazinon throughout the decomposition phase, suggesting a lack of within pond transference of dissipated diazinon. This study shows the relative effectiveness of diazinon adsorption by post-harvest rice plants and a potential mitigation strategy of senescence and pesticide degradation for contaminated tailwater.
KeywordsPesticide Diazinon Rice Stormwater Mitigation
Financial support was gratefully received through the cooperative agreement between the USDA-ARS and the University of Mississippi, No. 58-6408-1-095. Thanks go to the staff of the Water Quality and Ecology Research Unit at the USDA-ARS (Sam Testa, Charlie Bryant, Tim Sullivan, Calvin Vick, John Massey, and Terry Welch) for field help and especially to Lisa Brooks and Sammie Smith Jr. for sample preparation and analyses.
- Bennett, E. R., Moore, M. T., Cooper, C. M., & Smith, S. J. (2000). Method for simultaneous extraction and analysis of two current use pesticides, atrazine and lambda-cyhalothrin, in sediment and aquatic plants. Bulletin of Environmental Contamination and Toxicology, 64, 825–833. doi: 10.1007/s001280000077.CrossRefGoogle Scholar
- Brady, J. A., Wallender, W. W., Werner, I., Fard, B. M., Zalom, F. G., Oliver, M. N., et al. (2006). Pesticide runoff from orchard floors in Davis, California, USA: a comparative analysis of diazinon and esfenvalerate. Agriculture Ecosystems & Environment, 115, 56–68. doi: 10.1016/j.agee.2005.12.009.CrossRefGoogle Scholar
- Branham, B. E., & Wehner, D. J. (1985). The fate of diazinon applied to thatched turf. Agronomy Journal, 77, 101–104.Google Scholar
- Cronk, J. K., & Fennessy, M. S. (2001). Wetland plants: Biology and ecology. NY: Lewis.Google Scholar
- Domagalski, J. (1996). Pesticides and pesticide degradation products in stormwater runoff: Sacramento River basin, California. Water Resources Bulletin, 32(5), 953–964.Google Scholar
- Evans, J. R., Edwards, D. R., Workman, S. R., & Williams, R. M. (1998). Response of runoff diazinon concentration to formulation and post application irrigation. Transactions of the ASAE. American Society of Agricultural Engineers, 41(5), 1323–1329.Google Scholar
- Gunner, H. B., Zuckerman, B. M., Walker, R. W., Miller, C. W., Deubert, K. H., & Longley, R. E. (1966). The distribution and persistence of diazinon applied to plant and soil and its influence on rhizosphere and soil microflora. Plant and Soil, 25(2), 249–264. doi: 10.1007/BF01347822.CrossRefGoogle Scholar
- Holmes, R. W., & de Vlaming, V. (2003). Monitoring of diazinon concentrations and loadings, and identification of geographic origins consequent to stormwater runoff from orchards in the Sacramento River watershed, U.S.A. Environmental Monitoring and Assessment, 87, 57–79. doi: 10.1023/A:1024437913245.CrossRefGoogle Scholar
- Jayaweera, M. W., Kasturiarachchi, J. C., Kularatne, R. K. A., & Wijeyekoon, L. J. (2008). Contribution of water hyacinth (Eichornia crassipes (Mart.) Solms) grown under different nutrient conditions to Fe-removal mechanisms in constructed wetlands. Journal of Environmental Management, 87, 450–460. doi: 10.1016/j.jenvman.2007.01.013.CrossRefGoogle Scholar
- Larkin, D. J., & Tjeerdama, R. S. (2000). Fate and effects of diazinon. Reviews of Environmental Contamination and Toxicology, 166, 49–82.Google Scholar
- Outridge, P. M., & Noller, B. N. (1991). Accumulation of toxic trace elements by freshwater vascular plants. Reviews of Environmental Contamination and Toxicology, 121, 1–63.Google Scholar
- Schueler, T. (1995). Urban pesticides: from lawn to the stream. Watershed Protection Techniques, 2(1), 247–253.Google Scholar
- Smith, S. J., & Cooper, C. M. (2004). Pesticides in shallow groundwater and lake water in the Mississippi Delta MSEA. In M. Nett, M. Locke, and D. Pennington Water Quality Assessments in the Mississippi Delta, Regional Solutions, National Scope. (Pages 91–103). ACS Symposium series 877, American Chemical Society, Oxford University Press, Chicago, IL.Google Scholar
- Smith Jr, S., Cooper, C. M., Lizotte Jr, R. E., & Shields Jr., F. D. (2006). Storm pesticide concentrations in Little Toposhaw Creek, USA. International Journal of Ecology and Environmental Sciences, 32(2), 173–182.Google Scholar
- USEPA. (2007). EPA announces requests to voluntarily cancel registrations of diazinon. EPA announcement. http://www.epa.gov/oppfead1/cb/csb_page/updates/diazin-volcanc.html. Accessed 08/24/2007.