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First national-scale reconnaissance of neonicotinoid insecticides in streams across the USA

August 19, 2015

 To better understand the fate and transport of neonicotinoid insecticides, water samples were collected from streams across the United States. In a nationwide study, at least one neonicotinoid was detected in 53 % of the samples collected, with imidacloprid detected most frequently (37 %), followed by clothianidin (24 %), thiamethoxam (21 %), dinotefuran (13 %), acetamiprid (3 %) and thiacloprid (0 %). Clothianidin and thiamethoxam concentrations were positively related to the percentage of the land use in cultivated crop production and imidacloprid concentrations were positively related to the percentage of urban area within the basin. Additional sampling was also conducted in targeted research areas to complement these national-scale results, including determining: (1) neonicotinoid concentrations during elevated flow conditions in an intensely agricultural region; (2) temporal patterns of neonicotinoids in heavily urbanised basins; (3) neonicotinoid concentrations in agricultural basins in a nationally important ecosystem; and (4) in-stream transport of neonicotinoids near a wastewater treatment plant. Across all study areas, at least one neonicotinoid was detected in 63 % of the 48 streams sampled.

Citation Information

Publication Year 2015
Title First national-scale reconnaissance of neonicotinoid insecticides in streams across the USA
DOI 10.1071/EN15061
Authors Michelle Hladik, Dana W. Kolpin
Publication Type Article
Publication Subtype Journal Article
Series Title Environmental Chemistry
Series Number
Index ID 70156299
Record Source USGS Publications Warehouse
USGS Organization California Water Science Center