
Arizona–Sonora Border Reopens to Cattle Amid Screwworm Fight
Aug. 24 marks the reopening of the Agua Prieta–Douglas crossing to cattle after a yearlong closure to combat the New World screwworm; USDA deems Sonora and Chihuahua low risk, and Arizona will intensify screening with electronic IDs instead of ear tags to reduce trauma and infestation risk. The effort includes a joint sterile-fly program in southern Mexico, as Texas cases of the parasite threaten U.S. cattle herds and beef prices.













