Codling moth: field-cage mating competitiveness of radiosterilized males

Adult males of Laspeyresia pomonella (L.), reared on thinning apples, treated with 30 krad of gamma irradiation, and released in a field cage, mated 42 percent less often than unirradiated controls. Those which were reared on artificial diet and irradiated mated 27 percent less often. During the 3-4 days in the field cage, irradiated and unirradiated males did not differ in mortality or time of mating