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Animal and Plant Health Inspection Service
U.S. Department of Agriculture
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Areas Outside of the United States where Karnal Bunt is Known to Occur

Areas Outside of the United States where Karnal Bunt is Known to Occur:

  • Afghanistan
  • India
  • Iran
  • Iraq
  • Mexico
  • Mexican states of:
    • Chihuahua
    • Guanajuato
    • Jalisco
    • Michoacan
    • Queretaro
    • Mexicali Valley in:
      • Sonora
      • Baja California
  • Nepal
  • Pakistan
  • South Africa


Karnal Bunt Pest Free Areas:

The Administrator may recognize an area as an area free of Karnal bunt whenever he or she determines that the area meets the requirements of the International Standard for Phytosanitary Measures (ISPM) No. 4, “Requirements for the establishment of pest free areas.” The international standard was established by the International Plant Protection Convention of the United Nations' Food and Agriculture Organization and is incorporated by reference in 7CFR § 300.5. APHIS will publish a notice in the Federal Register and maintain on an APHIS Web site a list of the specific areas that are approved as areas in which Karnal bunt is not known to occur in order to provide the public with current, valid information. Areas listed as being free from Karnal bunt are subject to audit by APHIS to verify that they continue to merit such listing.

The following area of the Mexicali Valley in Mexico has been determined to be free from Karnal Bunt:

  • Those portions of the municipality of Mexicali, in the State of Baja California, and the municipality of San Luis Rio Colorado, in the State of Sonora, that are included in the Distrito de Desarrollo Rural (Rural Development District) 002 Rio Colorado.


Except for wheat (Triticum spp.) plants, which are prohibited importation under § 319.37 and/or § 319.59, approved articles that are from recognized pest free areas area may be imported into the United States subject to the following conditions:

  1. The articles are offered for entry at the port of Calexico, California; and
  2. The articles offered for entry are made available for examination by an inspector and remain at the port until released, or authorized further movement pending release, by an inspector; and
  3. The articles are accompanied by a phytosanitary certificate issued by the Mexican national plant protection organization that certifies that the articles are from the area of the Mexicali Valley described above and remained within that area prior to and during their movement to the United States.
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