Record Display for the EPA National Library Catalog


Main Title Toxicity of Synthetic Pyrethroids to Freshwater Invertebrates.
Author Anderson, R. L. ;
CORP Author Environmental Research Lab.-Duluth, MN.
Publisher c1989
Year Published 1989
Report Number EPA/600/J-89/033;
Stock Number PB90-100645
Additional Subjects Toxicity ; Invertebrates ; Aquatic biology ; Pesticides ; Culicidae ; Fresh water ; Zooplankton ; Reprints ; Pyrethroids ; Water pollution effects(Animals) ; Risk assessment ; Acute exposure ; Chironomids ; Blackflies
Library Call Number Additional Info Location Last
NTIS  PB90-100645 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 10p
The report reviews the laboratory toxicity data on fresh water target and nontarget invertebrates exposed to pyrethroids and evaluates the state of the data. Early in their development, pyrethroids were shown to be highly effective insecticides against mosquitoes, blackflies and chironomids. Acute LC50 values for these target animals were often less than 1 micro g/L. Acute exposures of nontarget invertebrates showed that some species were as sensitive as the target insects. Longer exposures, up to 28 days, showed that lethal effect concentrations were lowered with increased exposure duration. Unfortunately, the long-exposure tests were limited to a few species and a few pyrethroids, so no general commentary on no effect concentrations is possible. Some species were affected at concentrations near the analytical detection limit for pyrethroids. The data reviewed show that temperature, life cycle stage and exposure duration will be critical factors in developing the no effect concentrations that are important in risk assessments for nontarget invertebrates exposed to these insecticides.