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Le phénomène de superparasitisme chez les parasites oophages des punaises des blés

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Résumé

L'étude du superparasitisme chez les parasites oophages desAelia a été réalisée avec 3 espèces d'Ooencyrtus: O. fecundus Ferr. & Voeg.,O. nigerrimus Ferr. & Voeg., etO. telenomicida Vass. Ces 3 espèces apparaissent comme ayant un pouvoir de discrimination leur permettant d'éviter le superparasitisme lorsqu'elles ont suffisamment d'hôtes à leur disposition. Dans le cas contraire ou lorsque le nombre de femelles dans un même tube de ponte s'accroît, la tendance au superparasitisme augmente. Le superparasitisme se traduit par une baisse de la fécondité, une diminution de la taille et une modification du taux sexuel de la descendance.

Summary

The study of superparasitism in the oophagous parasites of theAelia spp has been realized with 3Ooencyrtus species:O. fecundus Ferr. & Voeg.,O. nigerrimus Ferr. & Voeg. andO. telenomicida Vass.

These 3 species appeared to have a discriminating ability which enable them to avoid superparasitism when the host population at their disposal is sufficient. In the opposite case or, when the number of females increases in the same tube, superparasitism tends to increase.

Superparasitism results in a decrease in fecundity as well as in size and the sex-ratio of the offspring.

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Authors and Affiliations

  1. École Nationale d'Agriculture de Meknès, Maroc

    M. Laraichi

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  1. M. Laraichi
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Laraichi, M. Le phénomène de superparasitisme chez les parasites oophages des punaises des blés. Entomophaga 23, 121–128 (1978). https://doi.org/10.1007/BF02371718

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  • DOI: https://doi.org/10.1007/BF02371718

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