||Ryckman, Edgerley, Tomlinson and Associates, Inc., St. Louis, Mo.;Environmental Protection Agency, Washington, D.C. Office of Water Programs.
The study is concerned with pesticide use on nonirrigated cropland, such as those in the midwestern United States. Pesticides are used in this area extensively for weed and insect control. In such lands, most of the area is subject to run-off and erosion which is seasonal. Generally, the pesticides used in this region attach themselves to organic matter and soil particles which, in turn, are carried off into rivers and streams by erosion. Thus, this region exhibits characteristic problems in pesticide application techniques and run-off losses. Using all available information, this study provides an in-depth evaluation of the impact on the natural environment of pesticides used for control of specific pests in the midwestern states of Illinois, Iowa, Kansas, Minnesota, and Missouri.