Manipulations of egg-gallery length to vary brood density in spruce beetle, <i>Dendroctonus rufipennis</i> (Coleoptera: Scolytidae): Effects on brood survival and quality

Authors

  • T. S. Sahota Pacific Forestry Centre Canadian Forestry Centre Victoria, B.C.
  • F. G. Peet Pacific Forestry Centre Canadian Forestry Centre Victoria, B.C.
  • A. Ibaraki Pacific Forestry Centre Canadian Forestry Centre Victoria, B.C.

Keywords:

spruce beetle, <i>Dendroctonus rufipennis</i>, Coleoptera, Scolytidae

Abstract

Different brood densities were produced under a constant bark surface area of the spruce host, by excising egg-producing female <i>Dendroctonus rufipennis</i> from the host material after they had excavated galleries of specified lengths. This procedure allowed a constant attack density. The numbers of adult progeny produced/cm of egg-gallery were significantly greater from bark slabs with short galleries and low densities: the sizes (pronotal widths) of adult progeny of both sexes were also significantly greater from low than from high densities; and the distribution patterns of chromatin differed significantly among high, medium and low densities.

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Published

2019-09-25

Issue

Vol. 84 (1987): Journal of the Entomological Society of British Columbia

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Articles

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