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Bark-Beetle Parasitoids Population Surveys Following Storm Damage in Spruce Stands in the Vosges Region (France)

Integrated Pest Management Reviews volume 6, pages 163–168 (2001)Cite this article

Abstract

This paper presents the results of a long-term study designed to follow the population dynamics of hymenopteran parasitoids associated with Ips typographus L. (Coleoptera: Scolytidae) in northeastern France (Alsace and Vosges) in spruce stands devastated by the December 1999 storms. Population densities were estimated by periodic samplings in the pre-emerging insect populations developing under the bark of attacked trees. Data were collected between July 2000 and October 2001. I. typographus population density (per m2) increased respectively by 28%, 105%, and 212% in one year in the three sites surveyed. Six hymenopteran ectoparasitoids were found: Coeloides bostrichorum Giraud and Dendrosoter middendorffi Ratzeburg (Hymenoptera: Braconidae); Rhopalicus tutela (Walker), Roptrocerus xylophagorum (Ratzeburg), Roptrocerus mirus (Walker) and Dinotiscus eupterus (Walker) (Hymenoptera: Pteromalidae). After two years, the parasitoid populations increased in terms of average density but parasitism rates remained at a relatively low level, ranging from 0% to 40%, with 60% of the trees having a parasitism rate below 5%. Data outlined the recurrent coexistence of competing parasitoid species.

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Author notes

  1. Evelyne Hougardy

    Present address: Fonds National de la Recherche Scientifique (FNRS), 5 rue d'Egmont, 1000, Bruxelles, Belgium

Authors and Affiliations

  1. Laboratoire de Biologie animale et cellulaire, CP 160/12, Université Libre de Bruxelles, 50 av. F.D. Roosevelt, 1050, Bruxelles, Belgium

    Evelyne Hougardy & Jean-Claude Grégoire

  2. Fonds pour la Formation à la Recherche dans l'Industrie et dans l'Agriculture (FRIA), 5 rue d'Egmont, 1000, Bruxelles, Belgium

    Evelyne Hougardy

  3. Fonds National de la Recherche Scientifique (FNRS), 5 rue d'Egmont, 1000, Bruxelles, Belgium

    Jean-Claude Grégoire

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  1. Evelyne Hougardy
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  2. Jean-Claude Grégoire
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Correspondence to Evelyne Hougardy.

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Hougardy, E., Grégoire, JC. Bark-Beetle Parasitoids Population Surveys Following Storm Damage in Spruce Stands in the Vosges Region (France). Integrated Pest Management Reviews 6, 163–168 (2001). https://doi.org/10.1023/A:1025727503264

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  • DOI: https://doi.org/10.1023/A:1025727503264

  • Ips typographus
  • natural enemies
  • parasitoids
  • Coeloides bostrichorum
  • Rhopalicus tutela
  • Roptrocerus xylophagorum
  • Roptrocerus mirus