Whatcom county, WA, appears to be under nematode quarantine. Does anyone have more information on this?
Whatcom county quarantine: Meloidogyne chitwoodi, COLUMBIA ROOT KNOT NEMATODE For details, see this page by the CANADIAN FOOD INSPECTION AGENCY
Canada probably should have one as the state of Nebraska has one: http://www.agr.state.ne.us/division/bpi/ent/crkn.htm