A quarantine is the restriction or prohibition of activities or movements that is imposed to prevent the spread of contagious diseases or pests. Under the Plant Protection Act, if APHIS considers it necessary to prevent the dissemination of a plant pest that is new to or not known to be widely prevalent or distributed within and throughout the United States, the Secretary may take certain remedial measures, including quarantine of the plant pest, plant product, article, or means of conveyance that:
- is moving into or through the United States or interstate, or has moved into or through the United States or interstate, and the Secretary has reason to believe is a plant pest or is infested with a plant pest at the time of the movement or is in violation or has violated the Plant Protection Act;
- has not been maintained in compliance with a post-entry quarantine requirement; or
- is the progeny of any plant, biological control organism, plant product, plant pest, or noxious weed that is moving into or through the United States or interstate, or has moved into the United States or interstate, in violation of the Plant Protection Act.