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Pyrethroid insecticides in bed sediments from urban and agricultural streams across the United States

Journal of Environmental Monitoring

By:
and
DOI: 10.1039/C2EM10946H

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Abstract

Pyrethroid insecticides are hydrophobic compounds that partition to streambed sediments and have been shown to cause toxicity to non-target organisms; their occurrence is well documented in parts of California, but there have been limited studies in other urban and agricultural areas across the United States. To broaden geographic understanding of pyrethroid distributions, bed sediment samples were collected and analyzed from 36 streams in 25 states, with about 2/3 of the sites in urban areas and 1/3 in agricultural areas. At least one pyrethroid (of the 14 included in the analysis) was detected in 78% of samples. Seven pyrethroids were detected in one or more samples. Bifenthrin was the most frequently detected (58% of samples), followed by permethrin (31%), resmethrin (17%), and cyfluthrin (14%). The other three detected pyrethroids (cyhalothrin, cypermethrin and delta/tralomethrin) were found in two or fewer of the samples. Concentrations ranged from 0.3 to 180 ng g-1 dry weight. The number of pyrethroids detected were higher in the urban samples than in the agricultural samples, but the highest concentrations of individual pyrethroids were split between urban and agricultural sites. The pyrethroids detected in the agricultural areas generally followed use patterns. Predicted toxicity was greater for urban areas and attributed to bifenthrin, cyfluthrin and cypermethrin, while in agricultural areas the toxicity was mainly attributed to bifenthrin.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Pyrethroid insecticides in bed sediments from urban and agricultural streams across the United States
Series title:
Journal of Environmental Monitoring
DOI:
10.1039/C2EM10946H
Volume
14
Issue:
7
Year Published:
2012
Language:
English
Publisher:
RSC Publishing
Publisher location:
London, UK
Contributing office(s):
California Water Science Center
Description:
8 p.
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Journal of Environmental Monitoring
First page:
1838
Last page:
1845
Additional Online Files(Y/N):
N