Damage by two Douglas-fir cone & seed insects: Correlation with cone crop size

Authors

  • G. E. Miller Pacific Forest Research Centre Canadian Forestry Service Agriculture Canada Victoria B.C.
  • A. F. Hedlin Pacific Forest Research Centre Canadian Forestry Service Agriculture Canada Victoria B.C.
  • D. S. Ruth Pacific Forest Research Centre Canadian Forestry Service Agriculture Canada Victoria B.C.

Keywords:

Douglas-fir cone moth, <i>Barbara colfaxiana</i>, Douglas-fir cone gall midge, <i>Contarinia oregonensis</i>

Abstract

Damage by the Douglas-fir cone moth, <i>Barbara colfaxiana</i> (Kearfott), in year N was significantly related to the size of the cone crop the preceding vear (N-1) in the interior of British Columbia but not at the coast. Damage by the Douglas-fir cone gall midge, <i>Contarinia oregonensis</i> Foote, at the coast was also significantly related to cone crop size the preceding year. Fluctuations in cone crop size appear to limit populations of these cone insects.

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Published

2019-09-17

Issue

Vol. 81 (1984): Journal of the Entomological Society of British Columbia

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Articles

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