The Use of Gamma Radiation for Control or Eradication of the Screw-Worm1

Abstract

The screw-worm, Callitroga hominivorax (Cqrl.), lias always been a serious pest of livestock in the Southwest, but it was not found in the Southeastern States until 1938. Undoubtedly it was introduced into this region by livestock shipments from the Southwest. Since its establishment in the Southeast, the screw-worm has caused serious losses to stockmen in Florida, Georgia, Alabama, and the Carolinas. Inasmuch as the species is not native to these states, it seems that if the present infestation could be eliminated they might be kept free from reinfestation through inspection of livestock shipments originating in or near infested areas.