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Updated: Jun 13, 2026

Vegetated Treatment Systems for Removing Contaminants Associated with Surface Water Toxicity in Agriculture and Urban Runoff
Published on: May 15, 2017
Toxicity persistence following an experimental cypermethrin and chlorpyrifos application in Pampasic surface waters
H Mugni1, P Demetrio, D Marino
1ILPLA, Instituto de Limnología "Dr. Raúl. A. Ringuelet" CONICET-(CCT La Plata)-UNLP, Av. Calchaquí Km 23.5, 1888, Florencio Varela, Buenos Aires, Argentina.
Abstract:
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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