OMAHA (DTN) -- Neonicotinoid insecticides associated with corn and soybean seed treatments are increasingly showing up in surface waters across the Midwest, a new U.S. Geological Survey study found.
The study, "Widespread occurrence of neonicotinoid insecticides in streams in a high corn and soybean producing region, USA," found neonicotinoids more frequently and in higher concentrations than historically-used organophosphates and carbamates found in previous studies in similar regions.
Neonicotinoids are used in many standard seed treatments for corn and soybeans.
USGS collected data from nine rivers and streams, including the Mississippi and Missouri rivers. The rivers studied drain most of Iowa, ...