U.S. Environmental Protection Agency (EPA) | State Pesticide Registration | Other

Center for Environmental and Regulatory Information Systems (CERIS)
Chemical Industry Performance (from American Chemistry Council)
CHEMTREC
Compendium of Pesticide Common Names
Herbicide Company Genealogy
National Antimicrobial Information Network
National Pesticide Information Retrieval System (NPIRS)
National Pesticide Information Center
Pest Facts Information Center
Pesticide Information Center On-Line
WeedScience.org