Pesticide Contamination and Environmental Exposure
New pesticides are developed continually, and increasingly, degradation byproducts of legacy and current-use pesticides are discovered. Information on the environmental occurrence of these chemicals is needed to evaluate their potential environmental and human health significance. This project activity has two-fold objectives: (1) develop methods to measure new pesticides and their byproducts in samples of various environmental media at concentrations relevant to assessing their persistence, transport, and fate; and (2) gather information on the environmental occurrence of these chemicals in sensitive and/or susceptible ecosystems near areas of common use of the pesticide, such as areas of similar land use, crop types, and/or farming practices. Pesticide-use studies in selected settings include:
Glyphosate is frequently applied to corn and soybeans growing areas like these in Iowa. USGS scientists have found that glyphosate and its degradation product AMPA (aminomethylphosphonic acid) are transported off-site from agricultural and urban sources and occur widely in the environment
. Photo Credit: William A. Battaglin, USGS
Pesticide Related Science Feature Articles
- A national reconnaissance of neonicotinoid insecticides in streams of the United States: Kolpin, D.W., and Hladik, M.L., Norman Bulletin (IN PRESS).
- First national-scale reconnaissance of neonicotinoid insecticides in streams across the USA: Hladik, M.L., and Kolpin, D.W., 2016, Environmental Chemistry, p. -, doi:10.1071/EN15061.
- Polyoxyethylene tallow amine, a glyphosate formulation adjuvant--Soil adsorption characteristics, degradation profile, and occurrence on selected soils from agricultural fields in Iowa, Illinois, Indiana, Kansas, Mississippi, and Missouri: Tush, D., and Meyer, M.T., 2016, Environmental Science and Technology, v. 50, no. 11, p. 5781-5789, doi:10.1021/acs.est.6b00965.