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Publication 52 - Hazardous, Restricted, and Perishable Mail >
5 Perishable Matter > 56 Plants > 562 Quarantines
The USDA imposes quarantines on specific plants to prevent the introduction of agricultural diseases or pests into the United States and to prevent their spread from one part of the United States to another.
There are domestic quarantines that apply to the continental United States; other quarantines that apply to Hawaii, Puerto Rico, and the U.S. Virgin Islands; and others that apply to other territories and possessions. The quarantines prevent the spread of specific diseases and pests. Any plant or plant matter that is under quarantine is nonmailable.
Plant quarantines cover a great variety of plant diseases and pests, and all areas of the country. For more specific information, consult Publication 14, Prohibitions and Restrictions on Mailing Animals, Plants, and Related Matter.
Plants under quarantine by the USDA may be moved from the quarantine areas only after being inspected and after a permit or certificate is issued. Refer to ASM 274.9 regarding USDA inspection of mail.