Autocidal Control of the Codling Moth by Release of Males and Females Sterilized as Adults by Gamma Radiation1

Larval progeny of Carpocapsa pomonella (L.), was reduced 80% when adult moths, exposed to 48 krad in carbon dioxide, were caged in the laboratory with untreated moths at a ratio of 15 irradiated males and 15 irradiated females to 1 untreated male and 1 untreated female. In an abandoned 2-hectare apple orchard, release of 271.000 irradiated (50 krad) male and female moths in 1964, and 478,000 in 1965, reduced the numbers of apples injured by codling moth at harvest from approximately 60% in 1963 to 1.6% in 1964 and to 0.3% in 1965.