Abstract
We studied the oviposition performance of Fopius arisanus (Sonan) (Hymenoptera: Braconidae) attacking eggs of four fruit flies of the genus Anastrepha Schiner (Diptera: Tephritidae) under laboratory conditions. The complete process of oviposition on an individual egg of Anastrepha ludens (Loew) lasts in average 85.4 ± 2.9 s, including a tremor (25.8 ± 1.03 s) observed in the middle of this process related to the egg’s descent. The average parasitism of A. ludens egg was 60.9 ± 7.5%, with only 1.2% of superparasitized eggs. During individual acts of oviposition, we noted that F. arisanus possesses a highly flexible ovipositor that curves easily as it searches for additional suitable eggs, which may be of particular benefit when a female finds large clutches of eggs. The individual oviposition of F. arisanus in host fruits attacked by Anastrepha spp. varies with the egg clutch size of each fruit fly species: A. serpentina laid the biggest egg clutches (21.3 ± 1.4), followed by A. ludens (14.2 ± 0.9), and A. striata (1.0 ± 0.0) (=A. obliqua). The time spent by F. arisanus in individual ovipositions was parallel to these findings, reinforcing the idea that F. arisanus attacks several eggs in each individual insertion of its ovipositor. Neither formal oviposition acts, nor adult emergences of F. arisanus were registered in A. obliqua. We discuss the potential of F. arisanus as natural enemy of fruit flies of the genus Anastrepha, and explore the eventual developing of its mass rearing.
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Acknowledgments
The authors particularly thank Dr. Juan F. Barrera (ECOSUR), Dr. Trevor Williams (INECOL) and two anonymous reviewers for helpful review of this manuscript. We also appreciate the statistical assistance by Javier Valle-Mora (ECOSUR). We thank Mario Pineda and Lia Ruiz for their technical assistance, along with J. Dominguez (Moscafrut facility) for providing the A. ludens eggs. This study was partially supported by CONACYT—COCYTECH, project CHIS-2005C03-012.
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Montoya, P., Suárez, A., López, F. et al. Fopius arisanus oviposition in four Anastrepha fruit fly species of economic importance in Mexico. BioControl 54, 437–444 (2009). https://doi.org/10.1007/s10526-008-9193-6
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DOI: https://doi.org/10.1007/s10526-008-9193-6