Screwworm menace to livestock
"The screwworm fly is a native of the tropics and breeds abundantly in the southern states. In recent years, it has also been found doing a great deal of damage to livestock in Missouri. While it does not survive our winters, each spring it may be carried north in wounds on livestock, where it continues to breed and spread from farm to farm during the summer months. Some summers, en tire counties in Missouri have been overrun by this active fly, resulting in the death of many cattle, hogs, sheep, and other animals, as well as serious damage to others. Some seasons, this is by far the most destructive insect pest of farm animals where a severe local outbreak occurs, and we have also had several cases of attack on man."--Page 1.