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首页> 外文期刊>Environmental toxicology and chemistry >PREDICTED TRANSPORT OF PYRETHROID INSECTICIDES FROM AN URBAN LANDSCAPE TO SURFACE WATER
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PREDICTED TRANSPORT OF PYRETHROID INSECTICIDES FROM AN URBAN LANDSCAPE TO SURFACE WATER

机译:拟除虫菊酯类农药从城市景观向地表水的运输

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摘要

The authors developed a simple screening-level model of exposure of aquatic species to pyrethroid insecticides for the lower American River watershed (California, USA). The model incorporated both empirically derived washoff functions based on existing, small-scale precipitation simulations and empirical data on pyrethroid insecticide use and watershed properties for Sacramento County, California, USA. The authors calibrated the model to in-stream monitoring data and used it to predict daily river pyrethroid concentration from 1995 through 2010. The model predicted a marked increase in pyrethroid toxic units starting in 2000, coincident with an observed watershed-wide increase in pyrethroid use. After 2000, approximately 70% of the predicted total toxic unit exposure in the watershed was associated with the pyrethroids bifenthrin and cyfluthrin. Pyrethroid applications for aboveground structural pest control on the basis of suspension concentrate categorized product formulations accounted for greater than 97% of the predicted total toxic unit exposure. Projected application of mitigation strategies, such as curtailment of structural perimeter band and barrier treatments as recently adopted by the California Department of Pesticide Regulation, reduced predicted total toxic unit exposure by 84%. The model also predicted that similar reductions in surface-water concentrations of pyrethroids could be achieved through a switch from suspension concentrate-categorized products to emulsifiable concentrate-categorized products without restrictions on current-use practice. Even with these mitigation actions, the predicted concentration of some pyrethroids would continue to exceed chronic aquatic life criteria.
机译:作者开发了一个简单的筛选级模型,用于在美国下游河流域(美国加利福尼亚州)对拟除虫菊酯类杀虫剂进行水生生物暴露。该模型结合了基于经验的冲刷函数,这些函数基于现有的小规模降水模拟以及美国加利福尼亚州萨克拉曼多县的拟除虫菊酯类杀虫剂使用和分水岭性质的经验数据。作者将模型校准为流内监测数据,并用它来预测1995年至2010年期间河中拟除虫菊酯的每日浓度。该模型预测从2000年开始拟除虫菊酯的有毒单位显着增加,同时观察到整个拟除虫菊酯使用范围。 2000年之后,在流域中,预计的总毒性单位暴露总量中约有70%与拟除虫菊酯联苯菊酯和氟氰菊酯有关。在悬浮浓缩物分类产品配方的基础上,拟除虫菊酯在地上结构害虫控制中的应用占预计总毒性单位暴露的97%以上。减缓策略的预计应用,例如加利福尼亚农药部最近采用的减少结构周边带和屏障处理等措施,使预计的总有毒单元暴露量减少了84%。该模型还预测,通过从悬浮浓缩物分类的产品到乳化浓缩物分类的产品的转换,可以实现拟除虫菊酯的地表水浓度的类似降低,而不受当前使用实践的限制。即使采取了这些缓解措施,一些拟除虫菊酯的预计浓度仍将超过慢性水生生物标准。

著录项

  • 来源
    《Environmental toxicology and chemistry》 |2013年第11期|2469-2477|共9页
  • 作者单位

    Agricultural and Environmental Chemistry Graduate Group, University of California, Davis, California, USA;

    John Muir Institute of the Environment, University of California, Davis, California, USA;

    Northwest Fisheries Science Center, National Oceanic and Atmospheric Administration, Seattle, Washington, USA;

    Department of Environmental Sciences, University of California, Riverside, California, USA;

    Swiss Centre of Applied Ecotoxicology, Swiss Federal Institute of Aquatic Science and Technology/Federal Polytechnical School of Lausanne, Dubendorf, Switzerland;

    Northwest Fisheries Science Center, National Oceanic and Atmospheric Administration, Seattle, Washington, USA;

    Swiss Centre of Applied Ecotoxicology, Swiss Federal Institute of Aquatic Science and Technology/Federal Polytechnical School of Lausanne, Dubendorf, Switzerland;

    Department of Integrative Biology, University of California, Berkeley, California, USA;

    Department of Land, Air and Water Resources, University of California, Davis, California, USA;

    Agricultural and Environmental Chemistry Graduate Group, University of California, Davis, California, USA;

    Department of Land, Air and Water Resources, University of California, Davis, California, USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Environmental modeling; Environmental fate; Pesticide runoff; Pyrethroids;

    机译:环境建模;环境命运;农药径流;拟除虫菊酯;

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