Toxicity of Vertimec® 18 EC (active ingredient abamectin) to the neotropical cladoceran Ceriodaphnia silvestrii

Chemosphere
Maressa P Casali-PereiraC M R Botta

Abstract

The aim of the present study was to evaluate the toxicity of abamectin to the neotropical cladoceran Ceriodaphnia silvestrii. To this end, acute and chronic bioassays were conducted with the commercial formulation Vertimec® 18 EC. In addition, the toxicity of water samples taken from a microcosm experiment evaluating the effects of a single application (144μga.i./L) and two applications (2×36μga.i./L) of Vertimec® 18 EC, in the presence or absence of a tadpole species (Lithobates catesbeianus), was also assessed. The acute LC50-48h for immobilization was 1.47μga.i./L and chronic NOEC-8d for survival and fertility (number of neonates per female) were 169 and 84nga.i./L, respectively. Irrespective of the presence of tadpoles, water samples from the microcosms applied with the single concentration of 144μga.i./L remained toxic until the end of the experiment, even when samples were diluted 32 times with culture medium. Water in the repeated pesticide treatment showed a similar toxic response after both applications. Toxicity of water samples from the microcosms was lower than that expected based on the generated LC50 values, which is explained by a potential reduced bioavailability of the test compound resulting from absorbance to...Continue Reading

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Citations

Dec 23, 2016·Environmental Science and Pollution Research International·Adrislaine S MansanoMirna H R Seleghim
Sep 13, 2017·Environmental Science and Pollution Research International·Mateus Flores Montalvão, Guilherme Malafaia
Aug 30, 2020·Archives of Environmental Contamination and Toxicology·Raquel Aparecida MoreiraEvaldo Luiz Gaeta Espindola
Apr 15, 2017·Ecotoxicology·Ana M VasconcelosEvaldo L G Espíndola
Jun 20, 2018·The Science of the Total Environment·Denise Braga Gomes de FariaGuilherme Malafaia
Jun 13, 2020·Ecotoxicology and Environmental Safety·Adrislaine S MansanoMirna H R Seleghim

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