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Entomophaga

, Volume 24, Issue 4, pp 363–369 | Cite as

Effects of parasite density and host availability on progeny production byBiosteres (Opius) longicaudatus, [Hym.: Braconidae], a parasite ofAnastrepha suspensa [Dip.: Tephritidae]

  • T. R. Ashley
  • D. L. Chambers
Article

Abstract

Progeny production ofBiosteres (Opius) longicaudatusAshmead, a larvalpupal parasite of the Caribbean fruit fly,Anastrepha suspensa (Loew) was affected by host availability, previous ovipositional experience, and parasite density and age. Parasitization rates were evaluated in 24.5 cm3 ovipositional cages at parasite densities of 25, 125, and 250 male-female pairs by exposingB. longicaudatus adults to (a) 500A. suspensa larvae for a 24 h period or (b)ad libitum host larvae for each of the 14 days following eclosion. The mean numbers of parasite progeny produced at the 25, 125, and 250 densities were 1076, 1896, and 2038, respectively. The number of progeny produced per surviving female parasite was inversely proportional to the adult parasite density and relatively more female progeny were produced as the adult parasites aged. Host mortality was significantly higher among parasitized larvae. Maximum rearing efficiency was achieved at the 125 density.

Keywords

Parasite Density Parasitization Rate Host Larva Parmi Adult Parasite 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Résumé

La descendance deBiosteres (Opius) longicaudatusAshmead, parasite des larves et des pupes de la mouche des fruits des Caraïbes,Anastrepha suspensa (Loew) est affectée par la disponibilité de l'hôte, une précédente ponte, la densité et l'âge du parasite. Les taux de parasitisme ont été évalués dans des cages de ponte de 24,5 cm3 avec des densités en parasites de 25, 125 et 250 couples en exposant les imagos deB. longicaudatus, soit à 500 larves deA. suspensa pendant 24 h, soitad libitum à des larves de l'hôte pendant les 14 jours suivant l'éclosion. Les nombres moyens de descendants du parasite produits pour les densités de 25, 125 et 250 furent respectivement de 1076, 1896 et 2038. Le nombre de descendants par femelle survivante du parasite fut inversement proportionnel à la densité en parasites adultes et relativement moins de femelles furent obtenues lorsque l'âge des parasites était plus avancé. La mortalité de l'hôte a été significativement plus élevée parmi les larves parasitées. Le meilleur rendement de l'élevage a été enregistré pour la densité de 125.

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References

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Copyright information

© Le François 1979

Authors and Affiliations

  • T. R. Ashley
    • 1
  • D. L. Chambers
    • 1
  1. 1.Insect Attractants, Behavior, and Basic Biology Research Laboratory, Agricultural Research, Science and Education AdministrationU.S.D.A.GainesvilleUSA

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