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Main Title Differential Toxicity and Uptake of Two Fenvalerate Formulations in Fathead Minnows, 'Pimephales promelas'.
Author Bradbury, S. P. ; Coats, J. R. ; McKim, J. M. ;
CORP Author Iowa State Univ., Ames.;Environmental Research Lab.-Duluth, MN.
Year Published 1985
Report Number EPA/600/J-85/187;
Stock Number PB86-117215
Additional Subjects Insecticides ; Toxicity ; Minnows ; Water pollution ; Butyrates ; Emulsifying agents ; Concentration(Composition) ; Exposure ; Mortality ; Survival ; Tests ; Reprints ; Pimephales promelas ; Fathead minnows ; Fenvalerate ; Pesticide residues
Library Call Number Additional Info Location Last
NTIS  PB86-117215 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 10p
The influence of the commercial emulsifier on the acute toxicity and uptake of fenvalerate ((R,S)-a-cyano-3-phenoxybenzyl(R,S)-2-(4-chlorophenyl)-3-methylbutyrate), a synthetic pyrethroid insecticide, by fathead minnows (Pimephales promelas) was examined. Flow-through acute toxicity testing with measured concentrations of technical-grade fenvalerate and a 30% active ingredient emulsifiable concentrate (EC) of the insecticide was conducted. Steady-state LC50 values were reached by 72 and 120 to 168 h, respectively, in tests with technical-grade and EC formulations of this insecticide. Initially, technical-grade fenvalerate was more toxic; the 96-h LC50s for technical-grade fenvalerate and the EC were 0.69 and 0.99 micrograms/l, respectively. By 168 h, an LC50 of 0.75 micrograms/l was determined for the EC, indicating that the incipient lethalities of the two formulations were similar. (Copyright (c) 1985 SETAC.)