Since a screwworm infestation was identified in the Lower Keys, more than 10 million sterile screwworm flies have been released on eight islands.
Sterile flies are the proven technology to eradicate screwworms. The flies are zapped with gamma radiation, making them sterile. Then those sterile flies are released to breed with wild flies. That stops reproduction, preventing more fly larvae.
Those larvae are the problem. Screwworm flies lay their eggs in open wounds. When the larvae hatch — those larvae are the actual "screwworms" — they feed on the living flesh of the host.