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.
Texas Ag Commissioner Sid Miller warns horse owners after EHV-1 cases linked to the Waco WPRA Finals. Horses linked to recent Waco events should be isolated and closely monitored, as early action is critical to stopping the spread of EHV-1.
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Screwworm.gov has targeted resources for a wide range of stakeholders, including livestock producers, veterinarians, animal health officials, wildlife professionals, healthcare providers, pet owners, researchers, drug manufacturers, and the general public.
November 21, 2025 02:09 PM
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Richard Gupton of the Agricultural Retailers Association explains a new resource designed to help farmers comply with ESA-related pesticide label requirements.
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Our friend Jake Charleston at Specialty Risk Insurance joins us for an industry update.
November 19, 2025 03:25 PM
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Expanded aerial capacity strengthens the U.S.–Mexico buffer against screwworm, providing cattle producers with stronger protection heading into winter and reducing risk to herds along the southern tier.
November 14, 2025 10:34 AM
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The facility will increase the range of sterile fly release and bolster preparedness for New World Screwworm.
November 13, 2025 01:15 PM
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