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Excerpt from Rfd Letter to Radio Farm Directors From Radio and Television Service: June, 1959
That unique effort to eradicate screwworms by sterilizing male flies in the Southeast is now under double check. The idea was that millions of screwworm flies, rendered sterile by exposure to radioactive cobalt, and released over the area where this live stock pest attacked cattle, would mate with native female flies which in turn would produce only infertile eggs. In that way, the species would eventually be wiped out. But now three flies have turned up in the hundreds of traps set out by the checkers. The specialists suspect the mysterious captives of being native screwworm flies. They say that at this advanced stage of the eradication campaign, final success depends more than ever on how thoroughly livestock producers in the Southeast search for and report infestations. They are getting AG to 50 samples of larvae and eggs taken from cattle wounds each week, but that's not enough for a good sampling. They are urging more farmers and ranchers to report on suspected cases.
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