Loading dispersal aircraft. When approximately 90 per cent of the flies have emerged, the boxes are loaded onto the dispersal aircrat. In Libya, dispersal begins early morning to simulate the fly. - - Program for eradication of New World Screwworm in North Africa. In 1989 the UN Food and Agriculture Organization (FAO) confirmed the presence of the New World Screwworm, Cochliomyia hominovorax Coquerel, in Libya. It was the first incidence of Screwworm outside the Americas, where it is considered the major livestock