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.
Tight cattle supplies keep prices high for ranchers, but policy shifts, export barriers, and packer losses signal a volatile road ahead for the beef supply chain.
November 07, 2025 11:02 AM
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Texas Cattle Feeders Association Chairman Robby Kirkland explains how the ongoing U.S.-Mexico border closure impacts feed yards that rely on Mexican cattle due to the New World Screwworm.
November 06, 2025 12:01 PM
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The Sheinbaum–Rollins meeting signals progress, but the focus remains on fully containing screwworm before cross-border movement resumes.
November 05, 2025 10:18 AM
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RaboResearch says China’s pivot from mass production to innovation-driven growth could reshape global pesticide supply chains — and influence prices and product access for U.S. farmers in the coming years.
November 04, 2025 01:20 PM
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An import lag for ground beef will likely look different than last year’s egg shortage. The difference comes down to biosecurity and market flexibility.
November 03, 2025 12:07 PM
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Texas A&M livestock economist Dr. David Anderson joins Tony St. James to discuss the geopolitical tensions and U.S.-Mexico border closure that are leading to sharp swings in the cattle market.
October 31, 2025 12:50 PM
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Expect firm calf and fed-cattle prices — pair selective heifer retention with prudent hedging and liquidity to bridge rebuilding costs.
October 17, 2025 04:54 PM
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Peel says Mexico has a much greater capability to expand its beef industry than it did 20 or 30 years ago in terms of its feeding and packing infrastructure.
October 16, 2025 03:59 PM
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“USDA can no longer keep wasting its time and personnel to deploy Commissioner Miller’s infamous traps, which USDA has deployed, tested, and has proven ineffective.”
October 14, 2025 01:19 PM
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