Selected Factors Affecting the Quality of Mediterranean Fruit Fly Used in Sterile Release Programs13

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Abstract
Adult irradiation of Ceratitis capitata (Wiedemann) males resulted in a lower degree of sterility and a higher degree of competitiveness compared to pupal irradiation. It was consistently observed with both adult and pupal irradiation that the increased level of sterility obtained with increasing dose was counteracted to the same extent by decreasing level of male competitiveness. In a test in which the marking efficiency and persistence of fluorescent powders was tested, best results were obtained with Tinopal-SFG. Marking did not have any adverse effect either on male competitiveness or on fly survival. Competitiveness of irradiated male flies decreased as their exposure to chilling increased. Chilling, however, did not have any adverse effect on fly survival.

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