The U.S. Department of Agriculture said in a post on X that a new sterile fly breeding plant in Texas is now expected to begin operations in spring 2027, ahead of an earlier projection that had targeted the end of next year. The facility is intended to produce sterile New World screwworm flies - the primary control method for the parasite - to help contain and eradicate the recent outbreak detected in Texas.
The June detection marked the first U.S. infestation of the parasitic New World screwworm in roughly three decades and raised immediate concerns for the livestock sector. The USDA has said the outbreak threatens up to $1 billion in losses to Texas livestock producers.
Currently, most sterile screwworm flies used in control programs are manufactured at a production plant in Panama, which produces about 100 million sterile flies per week. According to the USDA’s New World Screwworm Rapid Response account on X, the Texas facility would add another 100 million sterile flies per week by the end of 2027.
The agency also posted that production in Texas would expand further, reaching up to 300 million sterile flies per week by the end of 2028. The planned increases are aimed at boosting the total number of sterile flies available for aerial or ground dispersal as part of eradication efforts.
Experts cited by the agency note that roughly 500 million sterile flies per week are needed to drive the screwworm pressure southward to the Darien Gap, the stretch of rainforest separating Panama and Colombia. The combined outputs from Panama and the planned Texas facility represent a coordinated scaling of production over 2027 and 2028 to approach that benchmark.
The USDA announcement moved the expected operational date forward from an earlier timetable, a change that shortens the lead time for domestic sterile fly production. The agency's update focused on production targets and scheduling related to the rapid response effort rather than operational details of the new facility.
Summary
- The Texas sterile fly plant is now scheduled to open in spring 2027, earlier than previously planned.
- Initial Texas production is set to add 100 million sterile flies per week by the end of 2027, expanding to up to 300 million per week by the end of 2028.
- The first U.S. screwworm infestation in about 30 years was detected in Texas in June, posing up to $1 billion in potential losses to the state's livestock industry.
Key points
- Livestock and agriculture sectors face direct risk from the screwworm outbreak and will be primary beneficiaries of increased sterile fly production.
- Biosecurity and USDA rapid response operations are scaling production capacity domestically to supplement Panama's existing output of 100 million sterile flies per week.
- Meeting expert-identified thresholds for effective southward suppression - about 500 million sterile flies per week - depends on combined production increases across facilities.
Risks and uncertainties
- Timing and scale - while the USDA advanced the opening to spring 2027, the actual delivery of targeted weekly production volumes through 2027-2028 remains a key uncertainty for eradication efforts; this affects livestock producers and biosecurity planners.
- Economic exposure - the infestation threatens as much as $1 billion in losses to Texas’ livestock industry, creating market and operational risks for producers and related supply chains.
- Production shortfall risk - experts estimate about 500 million sterile flies per week are required to push the pest south; until combined production reaches that level, containment objectives may be harder to achieve, affecting agricultural markets and control program logistics.