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Toxicity Persistence Following an Experimental Cypermethrin and Chlorpyrifos Application in Pampasic Surface Waters (Buenos Aires, Argentina)


The Pampa plain is intensively cultivated, the genetically modified glyphosate-resistant soybean being the main culture. A small first-order stream draining a cultured farm was studied. During the dry 2007 spring, the channel became a wetland with remnant intercalated shallow pools. Toxicity persistence of cypermethrin and chlorpyrifos to the amphipod Hyallela curvispina was assessed following a simulated plane application in the recently formed pools. In situ exposures and laboratory toxicity tests were performed. An ephemeral toxicity pulse lasting 4 h after the application and mortality cessation following that was observed.

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This study was funded by “Agencia Nacional para la Promoción Científica y Tecnológica” and “Consejo Nacional de Investigaciones científicas y Técnicas”, Argentine.

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Correspondence to C. Bonetto.

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Mugni, H., Demetrio, P., Marino, D. et al. Toxicity Persistence Following an Experimental Cypermethrin and Chlorpyrifos Application in Pampasic Surface Waters (Buenos Aires, Argentina). Bull Environ Contam Toxicol 84, 524–528 (2010).

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  • Cypermethrin
  • Chlorpyrifos
  • Toxicity
  • Persistence