USDA Develops Major Sterile Fly Facility to Combat New World Screwworm Threat
The U.S. Department of Agriculture (USDA) is intensifying its efforts to combat the New World screwworm by investing $25 million in a new facility in Douglas, Arizona. This facility is part of a broader strategy to prevent the pest from spreading further into the United States. The Arizona facility will focus on dispersing sterile flies, a biological control technique that involves releasing sterile male flies to reduce the reproduction of wild populations. This method has been a central part of USDA's response to the screwworm threat, which became more urgent after the pest was detected in U.S. livestock, with the first case confirmed in a Texas calf in June 2026. The USDA is also developing a major sterile fly production facility at Moore Air Base in Edinburg, Texas, expected to produce up to 300 million sterile flies per week. 
