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Vectoring gypsy moth nuclear polyhedrosis virus byApanteles melanoscelus [Hym.: Braconidae]

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Abstract

Gypsy mothLymantria dispar L. larvae were exposed toApanteles melanoscelus (Ratzeburg) females contaminated with nuclear polyhedrosis virus. Three methods of contamination (ovipositor, total body surface, and exposure to infected hosts) and two exposure periods (2 and 24 hours) were tested. A significantly greater incidence of larval mortality caused by virus occurred among larvae exposed to contaminated than among larvae exposed to uncontaminated parasites for 2 and 24 hours. No significant differences occurred in larval mortality caused by virus for the 3 methods of contamination for the 2- and 24-hour tests or in parasite emergence from larvae parasitized by contaminated or uncontaminated parasites.

Résumé

Des larves deLymantria dispar L. furent exposées à des femelles d'Apanteles melanoscelus (Ratzeburg) contaminées par le virus de la polyédrose nucléaire. Trois méthodes de contamination (ovipositeur, surface totale du corps et exposition à des hôtes infectés) et deux délais (2 et 24 heures) furent comparés. Une mortalité significativement plus grande par le virus eut lieu chez les larves exposées aux parasites contaminés que chez les larves exposées aux parasites non contaminés pendant 2 et 24 heures. Il n'y eut pas de différences significatives dans la mortalité larvaire pour les trois méthodes de contamination selon la durée du contact: 2 et 24 heures et pas de différences significatives dans les sorties de parasites à partir des larves parasitées par des insectes contaminés et non-contaminés.

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Authors and Affiliations

  1. Dept. of Entomology, University of New Hampshire, 03824, Durham, NH, USA

    B. Raimo

  2. Gypsy Moth Program, Northeast Area State & Private Forestry, Forest Service, 06514, Hamden, CT, USA

    R. C. Reardon

  3. Northeastern Forest Experiment Station, Forest Service, 06514, Hamden, CT, USA

    J. D. Podgwaite

Authors
  1. B. Raimo
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  2. R. C. Reardon
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  3. J. D. Podgwaite
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Additional information

Part of a thesis submitted by the senior author in partial fulfillment of the requirements for the Master of Science degree in entomology at the University of New Hampshire.

The work herein reported was funded in whole or in part by U.S. Department of Agriculture sponsored program entitled “The Expanded Gypsy Moth Research and Applications Program”, U.S.D.A. Forest Service, Northeastern Area, State and Private Forestry.

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Raimo, B., Reardon, R.C. & Podgwaite, J.D. Vectoring gypsy moth nuclear polyhedrosis virus byApanteles melanoscelus [Hym.: Braconidae] . Entomophaga 22, 207–215 (1977). https://doi.org/10.1007/BF02377845

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