If anyone is interested in controlling parasites by playing with their reproduction, consider the "screwworm fence" down in Panama. Irradiated male screwworm f

If anyone is interested in controlling parasites by playing with their reproduction, consider the "screwworm fence" down in Panama. Irradiated male screwworm flies are bred and released en masse, to mate with wild females to produce nonviable offspring and thereby halt the species spreading further north. It works so well that few have heard about it.