Observations on a twigminer, <i>Argyresthia pseudotsuga</i> Freeman (Lepidoptera: Yponomeutidae), in Douglas-fir seed orchards

Authors

  • D. S. Ruth Pacific Forest Research Centre Canadian Forestry Service Environment Canada Victoria, B.C.
  • A. F. Hedlin Pacific Forest Research Centre Canadian Forestry Service Environment Canada Victoria, B.C.

Keywords:

twigminer, <i>Argyresthia pseudotsuga</i>, Lepidoptera, Yponomeutidae, Douglas-fir

Abstract

Studies on the twigminer, <i>Argyresthia pseudotsuga</i> Freeman, which kills new growth on twigs of Douglas-fir, showed that adults oviposited from mid-April until May on bud scales or on needles close to the buds. Eggs hatched in mid-May and larvae continued to mine in the new twigs until late fall or early winter. The insects pupated by the end of February in chambers at the bases of the twigs.

References

Freeman T.N. 1972. The coniferous feeding species of Argyresthia in Canada (Lepidoptera: Yponomeutidae). Can. Ent. 104:687-697.

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Published

2019-09-06

Issue

Vol. 76 (1979): Journal of the Entomological Society of British Columbia

Section

Articles

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