Revisiting Reviel Netz’s /Barbed Wire/ and found this in a footnote. He references testimonials from cowfarmers on the issue of ‘screwworm’ [look it up] and how the issue was dealt with:
“Although this goes beyond the chronological bounds here, it is appropriate to mention the remarkable way by which the screwworm would finally be eradicated from the plains. Insects are much more tenacious than mammals are, and their extermination calls for some ingenuity. The extermination of the screwworm would, in fact, call forth true scientific genius. This method, invented by the biologists Raymond C. Bushland and Edward F. Knipling, was employed in the 1960s on the plains, and the species, with rare exceptions, has never since been seen there. It works like this. Vast numbers of screwworm males are reared; using irradiation during the appropriate time in their growth, they are rendered sterile; then they are released. Now the flies do the work for you. The males seek out the females far better than any humans ever could. They mate, and each sterile mating event renders a female infertile for a cycle. The bona fide males, as it were, are put out of business through a dumping form of competition. It is obvious that with sufficient cycles, and sufficiently large numbers of sterile males released, the species will disappear. In fact, hundreds of millions of sterile flies were released each week over a decade. (A complication of the project should be added: since the extermination was not global but confined to the United States, it had to be defended perpetually on the Mexican border.) There is something truly dizzying about this image of humns mass-producing flies whose contribution is their own destruction. The entire operation was in fact a harbinger of modern genetic control over populations, and so the plains cow, the trigger for an early kind of modernity based on control through iron, served also as the trigger for the contemporary kind of modernity based on the more subtle controls of biotechnology”
…Netz adds, “Barbed wire created the conditions for a new type of cattle industry; simultaneously, it was a constant source of loss to it”