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ACARI ASSOCIATED WITH PHYLLOPHAGA ANXIA (LECONTE) (COLEOPTERA: SCARABAEIDAE) IN SOUTHERN QUEBEC AND EASTERN ONTARIO

Published online by Cambridge University Press:  31 May 2012

T.J. Poprawski  and
W.N. Yule
T.J. Poprawski
Affiliation:
Department of Entomology, Macdonald College of MdGill University, 21111 Lakeshore Road, Ste-Anne-de-Bellevue, Québec, Canada H9X 1C0
W.N. Yule
Affiliation:
Department of Entomology, Macdonald College of MdGill University, 21111 Lakeshore Road, Ste-Anne-de-Bellevue, Québec, Canada H9X 1C0
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Abstract

In the course of a systematic survey from 1979 to 1982 in southern Quebec and eastern Ontario, 11 genera of mites, representing five families and 15 species, were found associated with Phyllophaga anxia (LeConte). The rate of infestation in each growth stage of the host ranged from 0 (eggs and prepupae) to 54.6% (third-instar grubs). Although it was not possible to determine with certainty the ecological roles of the mite taxa, and thus to assess the real impact of the species involved, it is likely that the Macrochelidae, Parasitidae, and possibly Eviphididae were partially regulating local P. anxia populations. The Acaridae and Histiostomidae (Anoetidae) probably had a harmless phoretic or saprotrophic relation with their hosts. Most of the mite species reported here were found associated with Phyllophaga Harris in Canada for the first time.

Résumé

Lors d’un relevé systématique de 1979 à 1982 au Québec méridional et dans l’est ontarien, 11 genres d’acariens, représentant cinq familles et 15 espèces, ont été trouvé associés à Phyllophaga anxia (LeConte). Le taux d’infestation de chaque stade de croissance de l’hôte variait de 0 (oeufs et prépupes) à 54,6% (vers du troisième instar). Bien qu’il n’ait pas été possible de déterminer avec certitude le rôle écologique des taxa d’acariens, et donc d’évaluer l’impact réel des espèces impliquées, il est plausible que les Macrochelidae, Parasitidae et peut-être Eviphididae avaient une action régulatrice partielle sur les populations locales de P. anxia. Les Acaridae et Histiostomidae (Anoetidae) n’avaient probablement qu’une relation inoffensive de phorésie ou de saprobie avec leurs hôtes. La plupart des espèces d’acariens signalées ici ont été observées pour la première fois associées aux Phyllophaga Harris au Canada.

Type
Articles
Information
The Canadian Entomologist , Volume 124 , Issue 2 , April 1992 , pp. 397 - 403
Copyright
Copyright © Entomological Society of Canada 1992

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