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Toxicity of the insecticide terbufos, its oxidation metabolites, and the herbicide atrazine in binary mixtures to Ceriodaphnia cf dubia.
Choung, Catherine B; Hyne, Ross V; Stevens, Mark M; Hose, Grant C.
Afiliação
  • Choung CB; Department of Biological Sciences, Macquarie University, Balaclava Road, Macquarie University, NSW 2109, Australia. catherine.choung@environment.nsw.gov.au
Arch Environ Contam Toxicol ; 60(3): 417-25, 2011 Apr.
Article em En | MEDLINE | ID: mdl-20602097
The acute toxicity of terbufos and its major metabolites, tested alone, in binary mixtures or in combination with atrazine were evaluated using neonates of the cladoceran Ceriodaphnia cf dubia. Terbufos, terbufos sulfoxide, and terbufos sulfone tested individually were highly toxic to C. cf dubia, with mean 96-h EC(50) values of 0.08, 0.36, and 0.19 µg/l, respectively. The addition of atrazine (10 µg/l) significantly increased the toxicity of terbufos. The toxicity of terbufos sulfone was unaffected by atrazine, whereas the results for terbufos sulfoxide were equivocal. Equitoxic mixtures of the metabolites showed additive toxicity to C. cf dubia. The high toxicities of terbufos and its environmentally persistent oxidative metabolites suggest that contamination of aquatic systems with this insecticide mixture and the coapplied herbicide atrazine might pose a greater hazard to some biota than their individual toxicities.
Assuntos

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Compostos Organotiofosforados / Atrazina / Cladocera / Herbicidas / Inseticidas Limite: Animals Idioma: En Revista: Arch Environ Contam Toxicol Ano de publicação: 2011 Tipo de documento: Article País de afiliação: Austrália

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Compostos Organotiofosforados / Atrazina / Cladocera / Herbicidas / Inseticidas Limite: Animals Idioma: En Revista: Arch Environ Contam Toxicol Ano de publicação: 2011 Tipo de documento: Article País de afiliação: Austrália