The USDA has announced a new sterile fly breeding site in southern Texas to protect American cattle from the deadly New World screwworm maggots near the Mexico border.

By Cassandra Garrison TAPACHULA, Mexico (Reuters) -On a scorching afternoon in the rural heartland outside Mexico's southern city of Tapachula near the Guatemala border, rancher Julio Herrera calls his herd back from an afternoon of grazing.

Freddy Nieto is the manager at El Sauz Ranch in South Texas, which runs cattle but also offers deep-pocketed clientele the opportunity to hunt wildlife, from whitetail deer and wild hogs to exotic animals. “This might be the worst biological outbreak that we're facing in our lifetime,” he said.