A method was developed to calculate annual county level pesticide use for selected herbicides, insecticides, and fungicides applied to agricultural crops grown in the conterminous United States from 1992 through 2009. Pesticide-use data compiled by propri
Thelin, Gail P.,Stone, Wesley W. wwstone@usgs.gov. Estimation of annual agricultural pesticide use for counties of the conterminous United States, 1992-2009. 2013-01-01.