The lab which did the research, and produced the irradiated flies was in Kerrville, TX. It was not a huge facility. I guess you can raise millions of screw worms in a modest facility. They would drop boxes of the sterile male flies across Texas, successfully eradicating screw worms in Tx.
Amazing that you would be able to fill in that knowledge, after so many years. Thank you for that.
In the article, I remember a black-and-white picture of a horrible festering ulcer on some farm animal, a cow or a steer, caused by the screwworm larvae. I can still conjure it up in my memory, after more than sixty years.