How the U.S. was left exposed to the flesh-eating screwworm, years into the outbreak

CTV News 09 Nov Canada

For decades, planes dropped billions of factory-bred sterile flies to keep the flesh-eating New World screwworm out of North America’s cattle. That controls the pest because sterile males mate with wild females – whose eggs then fail to hatch. But the strategy works only if the supply of flies never runs short.

Aggregated from the leading newsrooms of the country. Every story links to its original source.