Hostname: page-component-586b7cd67f-t7fkt Total loading time: 0 Render date: 2024-11-29T18:36:57.014Z Has data issue: false hasContentIssue false
  • English
  • Français

EFFECT OF FORMICA OBSCURIPES (HYMENOPTERA: FORMICIDAE) ON THE PREDATOR–PREY RELATIONSHIP BETWEEN HYPERASPIS CONGRESSIS (COLEOPTERA: COCCINELLIDAE) AND TOUMEYELLA NUMISMATICUM (HOMOPTERA: COCCIDAE)

Published online by Cambridge University Press:  31 May 2012

G. A. Bradley
G. A. Bradley
Affiliation:
Canadian Forestry Service, Department of the Environment, Ottawa
Get access Rights & Permissions [Opens in a new window]

Abstract

The scale insect Toumeyella numismaticum Pettit and McDaniel occurred in small areas of heavy infestation in jack pine, Pinus banksiana Lamb., stands of southeastern Manitoba, where it was present in the same areas every year. The large populations of Formica obscuripes Forel present in the scale-infested areas lessened the effectiveness of the main predator of the scale, the coccinellid Hyperaspis congressis Watson, through interference with the Hyperaspis adults.

Résumé

Le Kermès-tortue du Pin, Toumeyella numismaticum, ravage fortement de petites superficies isolées dans les peuplements de Pin gris, Pinus divaricata (Pinus banksiana) dans le sud-est du Manitoba. Il se retrouve d’une année à l’autre aux mêmes endroits. L’auteur trouva que les fortes populations de Formica obscuripes trouvées avec les Kermès-tortues du Pin diminuaient l’efficacité du principal prédateur des Kermès-tortues du Pin : la Coccinelidée Hyperaspis congressis vu que leur action intefère avec celle des adultes d’Hyperaspis.

Type
Articles
Information
The Canadian Entomologist , Volume 105 , Issue 8 , August 1973 , pp. 1113 - 1118
Copyright
Copyright © Entomological Society of Canada 1973

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Bradley, G. A. and Hinks, J. D.. 1968. Ants, aphids and jack pine in Manitoba. Can. Ent. 100(1): 40–50.CrossRefGoogle Scholar
Brown, A. W. A. 1939. The jack pine scale. In A. Rep. Forest Insect Survey, Science Service, Dept. of Agric., Ottawa.Google Scholar
Hagen, K. S. 1962. Biology and ecology of predaceous Coccinellidae. A. Rev. Ent. 7: 289–326.CrossRefGoogle Scholar
Huffaker, C. B. 1958. Experimental studies on predation: dispersion factors and predatorprey oscillations. Hilgardia 27: 343–383.CrossRefGoogle Scholar
Rabkin, F. B. 1940 (unpub.). Jack pine tortoise scale. In A. Rep. Forest Biol. Lab., Winnipeg, Man.Google Scholar
Rabkin, F. B. and Lejeune, R. R.. 1954. Some aspects of the biology and dispersal of the pine tortoise scale, Toumeyella numismaticum. Can. Ent. 86(12): 570–575.CrossRefGoogle Scholar