Disinfestation of Averrhoa carambola infested with Anastrepha obliqua (Macquart, 1835) (Diptera - Tephritidae) using gamma radiation

The disinfestation dose of gamma radiation in Averrhoa carambola infested with larvae of Anastrepha obliqua was determined. Fruits were collected in the field, each having about 11 larvae in the last instar. Fruits were irradiated with the following ganna radiation doses: 0 (control), 50, 150, 300, 600 and 900 Gy. Each treatment consisted of 9 fruits (3 replications) giving the amount of 99 larvae for each treatment. After irradiation the fruits were kept in a climatic chamber with the temperature adjusted to 25± 50 C and relative humidity of 70± 50 C, until larvae left the fruit and became transformed into pupae and adults. The lethal dose (LD100) of gamma radiation for larvae in the fuits was 600 Gy and the dose of 50 Gy inhibited completely the total emergency of adults. (author). 19 refs, 1 figs, 1 tab