Parasiticide Regulations for Organic Dairy and Livestock in the United States

Organic Agriculture June 15, 2012 Print Friendly and PDF

eOrganic author:

Jim Riddle, University of Minnesota

According to the National Organic Program (NOP) final rule (United States Department of Agriculture [USDA], 2000), the use of parasiticides is prohbitied for all organic slaughter stock. When preventative treatments do not prevent infestation, parasiticides may be used for emergency treatment of:

  1. Breeder stock, when used prior to the last third of gestation, but not during lactation of progeny that are to be sold, labeled, or represented as organically produced; and,
  2. Dairy stock, when used a minimum of 90 days prior to the production of milk or milk products that are to be sold, labeled, or represented as organic.

At the present time, Ivermectin (CAS# 70288-86-7); Fenbendazole (CAS# 43210-67-9); and Moxidectin (CAS# 113507-06-5) are the only parasiticides on the National List and, therefore, allowed with the restrictions noted above. Fenbendazole can only be used by or on the lawful written order of a licensed veterinarian. Moxidectin can only be used for control of internal parasites.

References and Citations


This is an eOrganic article and was reviewed for compliance with National Organic Program regulations by members of the eOrganic community. Always check with your organic certification agency before adopting new practices or using new materials. For more information, refer to eOrganic's articles on organic certification.

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This work is supported by the USDA National Institute of Food and Agriculture, New Technologies for Ag Extension project.