Abstract
Biological differences among 3 morphologically identical populations ofAphytis which would key down toA. maculicornis (Masi) are presented through studies conducted on their reproductive isolation, host preferences and adult suvivorships at different temperatures. These results supplement results on experimental hydridization and provide ample evidence that from a practical biological control stand-point as well as from basic biosystematics, these 3 populations are valid species, distinct from each other. The significance of such sibling species in relation to biological control is discussed.
Résumé
Cette étude concerne trois groupes de populations allopatriques deAphytis maculicornis indistinguables du point de vue morphologique — «Perse», «Pakistan» et «Californie». Des tests d'accouplement à choix multiples ont essentiellement indiqué un isolement complet de ces groupes pour la reproduction. Des expériences qui comprenaient six différentes espèces de cochenilles ont démontré qu'il existait des différences significatives de préférence d'hôte parmi les trois populations. Des tests déterminant la longévité des adultes ont également indiqué des différences significatives d'une population à l'autre, surtout à une température de 27°C. On en conclut que ces populations représentent trois espèces sœurs bien distinctes. Ces résultats soulignent l'importance de telles espèces sœurs dans le domaine de la lutte biologique.
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References
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This study was a part of the Ph. D. dissertation of the first author submitted to the University of California, Riverside. Financial support through grants GB 7444 and GB 17829 of the National Science Foundation awarded toPaul DeBach is gratefully acknowledged.
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Khasimuddin, S., DeBach, P. Biosystematic status of three allopatric populations ofAphytis maculicornis [Hym.: Aphelinidae] . Entomophaga 21, 81–92 (1976). https://doi.org/10.1007/BF02372018
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DOI: https://doi.org/10.1007/BF02372018