R-CALF USA is calling on the FDA to approve ivermectin to help protect livestock from the possible spread of New World screwworm in the U.S.
The group says that feed-grade ivermectin is a proven tool to protect domestic herds and wildlife, especially in southern border states.
They highlight the success of the drug in limiting the spread of cattle fever tick.
“The potential impact on the United States livestock markets would be immensely negative if an actual case of New World screwworm was identified in the USA. Until an adequate response with gamma ray irradiation of male screw worm flies can be implemented, the feeding of ivermectin is a very real defense.”
The request follows false reports that New World screwworm was found in Missouri. That claim caused a downturn in cattle futures markets and is now being investigated by the state of Missouri.
Marilyn Schlake with the UNL Department of Agricultural Economics joined us for a closer look at the evolving role of livestock sale barns.
January 27, 2026 12:19 PM
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Nearly everyone in the South Texas ag community appears extremely worried about the potential of a New World screwworm epidemic, according to a local veterinarian. RFD NEWS Correspondent Frank McCaffrey reports.
January 23, 2026 11:56 AM
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Wayne Cockrell with the Texas and Southwestern Cattle Raisers Association joined us to discuss preparedness, producer awareness, and the industry’s response to New World screwworm concerns.
January 21, 2026 12:00 PM
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Texas Commissioner of Agriculture Sid Miller joined us to discuss data center expansion, farmland preservation, rural economic impacts, and imminent cattle biosecurity concerns affecting agriculture today.
January 16, 2026 01:28 PM
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January 16, 2026 09:57 AM
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Agronomy experts explain why standing crop residue protects soil and reduces costs for crop growers, while shredding often yields little benefit at higher costs.
January 14, 2026 08:00 AM
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Dr. Rosslyn Biggs with the Oklahoma State University Center for Rural Veterinary Medicine shares insight into biosecurity, preparedness, and animal health concerns facing livestock producers as New World screwworm outbreaks continue in Mexico.
January 07, 2026 12:57 PM
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Roger McEowen with the Washburn University School of Law joined us to provide legal insight and context on these issues facing agriculture. Today, he discusses pesticide litigation.
January 06, 2026 01:39 PM
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New World Screwworm cases in Mexico, including one within 200 miles of the U.S. border, are adding pressure to livestock markets and trade decisions.
January 06, 2026 12:09 PM
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