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Widespread occurrence of neonicotinoid insecticides in streams in a high corn and soybean producing region, USA

Environmental Pollution

By:
, ,
DOI: 10.1016/j.envpol.2014.06.033

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Abstract

Neonicotinoid insecticides are of environmental concern, but little is known about their occurrence in surface water. An area of intense corn and soybean production in the Midwestern United States was chosen to study this issue because of the high agricultural use of neonicotinoids via both seed treatments and other forms of application. Water samples were collected from nine stream sites during the 2013 growing season. The results for the 79 water samples documented similar patterns among sites for both frequency of detection and concentration (maximum:median) with clothianidin (75%, 257 ng/L:8.2 ng/L) > thiamethoxam (47%, 185 ng/L:<2 ng/L) > imidacloprid (23%, 42.7 ng/L: <2 ng/L). Neonicotinoids were detected at all nine sites sampled even though the basin areas spanned four orders of magnitude. Temporal patterns in concentrations reveal pulses of neonicotinoids associated with rainfall events during crop planting, suggesting seed treatments as their likely source.

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Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Widespread occurrence of neonicotinoid insecticides in streams in a high corn and soybean producing region, USA
Series title:
Environmental Pollution
DOI:
10.1016/j.envpol.2014.06.033
Volume
193
Year Published:
2014
Language:
English
Publisher:
Elsevier
Contributing office(s):
California Water Science Center
Description:
8 p.
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
First page:
189
Last page:
196
Number of Pages:
8
Country:
United States