Oriental Fruit Fly:1 Sexual Development and Mating Response of Laboratory-Reared and Wild Flies23

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Abstract
The mating patterns of wild oriental fruit flies, Dacus dorsalis Hendel, were compared with those of a 28-year-old laboratory strain. In the laboratory, 100% of the laboratory-reared females were mated by day 12 postemergence, whereas only 2.5% of females of the wild strain were mated 13 days postemergence. Laboratory tests indicated a partial sexual isolation between the laboratory-reared males and wild females—in the cross mating, only 50% were mated by day 24 of adult life. In the cross mating between wild males and laboratory-reared females, and in the mating of wild males and wild females, 90% mating was obtained by day 24. Further evidence of sexual isolation between the two strains was obtained in field cage tests. When laboratory-reared flies that had been irradiated with 10 krad in N2 were released in field cages with normal wild flies, the results were similar to those obtained from laboratory-reared flies that were unirradiated with normal wild flies. The results of both field tests showed that significantly more males mated with females of the same strain than cross matings.