US EPA: Mercury Use: Agriculture
Mercury was traditionally used in agricultural chemicals as a fungicide, mildewcide, or pesticide. All food uses of mercury-containing pesticides were cancelled in 1969, and all US pesticide registrations were canceled in as of early 1995. The last four uses to be cancelled were turf fungicide, mildewcide for fresh cut wood, latex paint fungicide/preservative, and outdoor fabric treatment. However, many mercury- containing chemicals may still be present on farms or golf courses in the form of old stockpiles. These materials should be targeted by
waste pesticide collection programs or clean sweep programs to prevent further emissions to the environment.