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.
Mugni
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ILPLA, Instituto de Limnología "Dr. Raúl. A. Ringuelet" CONICET-(CCT La Plata)-UNLP, Av. Calchaquí Km 23.5, 1888, Florencio Varela, Buenos Aires, Argentina.
Demetrio
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P
Marino
D
D
Ronco
A
A
Bonetto
C
C
D033304:Amphipoda / Q000187:drug effects / Q000502:physiology*; D000818:Animals; D001118:Argentina; D004390:Chlorpyrifos / Q000633:toxicity*; D004784:Environmental Monitoring; D005618:Fresh Water / Q000737:chemistry*; D007306:Insecticides / Q000633:toxicity*; D008136:Longevity / Q000187:drug effects; D010573:Pesticide Residues / Q000633:toxicity*; D011722:Pyrethrins / Q000633:toxicity*; D018675:Toxicity Tests; D053833:Wetlands
D007306:Insecticides; D010573:Pesticide Residues; D011722:Pyrethrins; C017160:cypermethrin; D004390:Chlorpyrifos