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.
David Gruchot with USDA APHIS joined us to discuss the growing threat of invasive pests and the steps individuals can take to help protect U.S. agriculture.
April 16, 2026 11:32 AM
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Texas Agriculture Commissioner Sid Miller joins us with an update on the most recent case of New World screwworm 90 miles from the U.S. Southern border.
April 15, 2026 11:40 AM
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Texas ranchers and lawmakers warn of renewed New World screwworm risks, highlighting prevention efforts, border concerns, and the role of sterile flies in protecting U.S. livestock.
April 10, 2026 11:19 AM
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Georgia Ag Commissioner Tyler Harper explains the growing threat of invasive hornets in his state and what Southeastern growers should watch for this spring.
April 09, 2026 02:54 PM
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Matt Dolch with Syngenta discusses rootworm pressure, the latest trait technologies, and how corn growers can plan for 2027.
Cattle producers face mounting pressure as U.S.-Mexico trade talks resume, but expanding drought, rising input costs, and policy work to improve the long-term industry outlook.
April 06, 2026 01:27 PM
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