Bark beetles, <i>Pseudohylesinus</i> spp. (Coleoptera: Scolytidae), associated with amabilis fir defoliated by <i>Neodiprion</i> sp. (Hymenoptera: Diprionidae)

Authors

  • L. H. McMullen Pacific Forest Research Centre Canadian Forestry Service Environment Canada Victoria, B.C.
  • R. L. Fiddick Pacific Forest Research Centre Canadian Forestry Service Environment Canada Victoria, B.C.
  • R. O. Wood Pacific Forest Research Centre Canadian Forestry Service Environment Canada Victoria, B.C.

Keywords:

bark beetles, <i>Pseudohylesinus</i> spp., Coleoptera, Scolytidae, amabilis fir, <i>Neodiprion</i> sp., Hymenoptera, Diprionidae

Abstract

Only <i>Abies amabilis</i> (Dougl.) Forbes heavily defoliated by a sawfly, <i>Neodiprion</i> sp., supported broods of <i>Pseudohylesinus </i>spp.. Although many trees with less defoliation showed evidence of attack, usually it was caused by adult beetles making overwintering niches. <i>P. granulatus</i> (Leconte) was found on the lower bole, whereas <i>P. grandis</i> Swaine and <i>P. nobilis</i> Swaine were found on the upper bole. Defoliated <i>Tsuga heterophylla</i> (Raf.) Sarg. were not attacked by bark beetles.

References

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Published

2019-08-28