[en] The Oriental fruit fly, Dacus dorsalis Hendel, is well recognized as a serious pest that causes damage to various kinds of fruits. It not only causes enormous losses in production, but also poses quarantine problems and severely restricts the trade and movement of fresh fruits between countries. Irradiation is one of the measures which is considered to be applicable to plant quarantine treatment for fruit fly control. Use of gamma irradiation for disinfestation of the Oriental fruit fly in mangoes has been carried out in Thailand. The results showed that a dose of 150 Gy achieved better than the probit-9 level of mortality, based on the criterion of efficacy of non-emergence of adult insects when five day old Dacus dorsalis larvae were treated. When 138,538 larvae were irradiated at the same dose, only one adult insect was recovered, generating a mortality of 99.9993%. However, when the criterion of efficacy based on the non-formation of pupae was used, a percentage mortality of only 25.9484 was obtained. (author). 16 refs, 1 tab