Resumen de Effect of gamma radiation againts the Mediterranean fruit fly "Ceratitis capitata" (Diptera: Tephritidae) in guava fruits
H. O. S. Dória, N. M. M. S. Albergaria, V. Arthur, S. A. de Bortoli
Fruit flies of the family Tephritidae are considered the most important insects pest risk carried by exported fruits worldwide. Because reports have show that guavas are important host of the pest, quarentine treatments must be developed if it�s to exported to countries which impose quarentine restrictions on Mediterranean fruit fly infestable commodities. Ionizing radiation is one alternative method of quarentine treatment. This work was carried out to study the effect of different doses of gamma radiation against eggs and larvae of Ceratitis capitata in guavas of �Pedro Sato� cultivar. Guavas artificially infested with eggs and larvae were exposed to ionizing gamma radiation at the following doses: 0 (control), 50, 100 and 150 Gy for eggs and 0 (control), 50, 100, 150, 200 and 250 Gy for first and third instar larvae, at the dose rate of 352 Gy per hour. After irradiation fruits were put in plastic pots in a room at 25±1°C and 70±5% RH. Pupae obtained were sieved out and kept in small glass tubes. All doses tested did not allow emergence of adults in both treatments (eggs and larvae).
