ABSTRACT
A quarantine treatment must either give complete kill of the pest against which the treatment is applied or disrupt its life cycle in order to prevent its reproduction. Laboratory research has shown that the effects of irradiation on immature fruit flies can be expressed in various ways depending upon the stage of development present at the time of treatment and the dose applied. S. T. Seo et al. reported results of the first large scale confirmatory tests of irradiation as a quarantine treatment in a series of tests on three species of fruit fly larvae infesting different fruits in Hawaii. Confirmatory tests, in which large numbers of infested fruits containing immature fruit flies were treated, have been conducted in several countries to confirm the effectiveness of irradiation as a quarantine treatment against several species of fruit flies. The western cherry fruit fly, Rhagoletis indifferens Curran, is such a species.
