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  • 1
    ISSN: 1573-8248
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Description / Table of Contents: Résumé L'aptitude des femelles parasitoides (Chelonus insularis Cresson,Telenomus heliothidis Ashmead, etTrichogramma pretiosum Riley) à discerner les œufs de «vers du bourgeon» du tabac,Heliothis virescens (F.), qui sont parasités de ceux qui ne le sont pas, a été analysée par des études de laboratoire. Les 3 espèces ont été relativement efficaces en distinguant les œufs qui avaient été parasités auparavant par des femelles conspécifiques.Telenomus heliothidis etTrichogramma pretiosum pouvaient les discerner par examen externe tandis queC. insularis semblait pouvoir discerner les hôtes parasités par examen externe ou interne. Dans des essais interspécifiques, chacune des espèces a distingué faiblement les œufs parasités par les 2 autres espèces.
    Notes: Abstract The ability of female parasitoids (Chelonus insularis Cresson,Telenomus heliothidis Ashmead, andTrichogramma pretiosum Riley) to distinguish between parasitized and unparasitized tobacco budworm,Heliothis virescens (F.), eggs was determined in laboratory studies. All 3 species were relatively efficient at detecting eggs that were previously parasitized by conspecific females.T. heliothidis andT. pretiosum were able to discriminate on the basis of external examination of host eggs, whereasC. insularis appeared to examine hosts internally as well as externally. In interspecific tests, no species readily rejected eggs parasitized by the other 2 species.
    Type of Medium: Electronic Resource
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