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Mangoes infested with third instar larvae were irradiated using Co-60 gamma rays and a dose interval of 2Ð250 Gy to assess the irradiation dose required to prevent adult emergence of the Mexican fruit ßy (Anastrepha ludens), the West Indies fruit ßy (A. obliqua), the sapote fruit ßy (A. serpentina), and the Mediterranean fruit ßy (Ceratitis capitata). Doses of 76.9, 87.3, 91.4 and 112.7 Gy, were estimated to inhibit 99.9968% (probit 9) of adult emergence forA. obliqua,A. serpentina, A. ludens, and C. capitata, respectively. Using mangoes infested with a total of 100,000 larvae of each species, the results obtained in the laboratory were conÞrmed using a dose of 100Gyfor the Anastrepha species and 150 Gy for C. capitata. No adult emergence was observed for any of the four species compared with 80% emergence in the controls. A dose of 150 Gy is recommended as a generic quarantine treatment against potential infestation of these species in exported mangoes. A minor decrease in the ascorbic acid content was the only adverse effects observed in irradiated mangoes. Inglés

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