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USDA Breaks Ground on $8.5 Million Texas Screwworm Fly Facility

SOUTHERN TEXAS AND SOUTHERN MEXICO, JUL 2 – The USDA aims to release up to 400 million sterile flies weekly to halt the flesh-eating screwworm, protecting livestock and wildlife from a pest threatening the southern U.S. border.

  • The U.S. government plans to breed and release billions of sterilized male screwworm flies over Mexico and southern Texas starting by July 2026.
  • This effort responds to the threat of the flesh-eating New World screwworm fly, which can kill cattle in two weeks and recently caused the U.S. to close its southern border to livestock imports until mid-September.
  • The USDA will open a new breeding factory in southern Mexico and a distribution center in southern Texas, investing over $29 million to scale production from Panama's current 117 million flies weekly to 400 million flies weekly.
  • Edwin Burgess of the University of Florida called the sterile fly release "an exceptionally good technology," noting previous eradication of the pest in North America through the same method from 1962 to 1975 with over 94 billion flies bred.
  • This approach aims to reduce the pest population by releasing sterilized males that mate ineffectively, a strategy viewed as more effective and environmentally sound than spraying pesticides, but experts warn the pest could still reemerge despite past successes.
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A bizarre plan against a new threat is causing a stir: the US administration under Donald Trump has billions of flies grown – in order to discard them from aircraft later.

·Berlin, Germany
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U.S. News broke the news in New York, United States on Tuesday, July 1, 2025.
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