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OBSERVATIONS ON THE LIFE HISTORY AND HABITS OF ALNIPHAGUS ASPERICOLLIS (COLEOPTERA: SCOLYTIDAE) IN SOUTHWESTERN BRITISH COLUMBIA1

Published online by Cambridge University Press:  31 May 2012

John H. Borden
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Abstract

The alder bark beetle, Alniphagus aspericollis (LeConte), is bivoltine on Burnaby Mountain, B.C. The principal spring attack occurred in May and the second generation attack from mid July to early August. Mature adults overwinter in shallow galleries underneath the bark while larvae, pupae, and callow adults overwinter in the brood galleries. Sporadic emergence occurred in warm periods throughout the winter but the first egg galleries were not observed until early March. Windfalls and standing trees were attacked.Adult sexes can be distinguished by the fused (female) or separate (male) seventh and eighth abdominal tergites. Females attack the host first and are soon joined by the males. Single egg galleries extending about 8 cm parallel to the length of the bole are most common. Eggs are laid on both sides of the gallery; the larvae mine outward at right angles to the egg gallery and then usually up or down the bole. Adult gallery construction and oviposition and larval mining habits were observed through plexiglass–bark "sandwiches," and are similar to those in the genus Ips. Pupation occurs in a chamber in the inner bark. Maturation from egg to callow adult required a minimum of 8 weeks.

Type
Research Article
Information
The Canadian Entomologist , Volume 101 , Issue 8 , August 1969 , pp. 870 - 878
Copyright
Copyright © Entomological Society of Canada 1969

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Footnotes

1

Research supported by Operating Grant, National Research Council, Canada, and by a President's Research Grant, Simon Fraser University.

References

Bright, D. E. 1964. Descriptions of three new species and new distribution records of California bark beetles. Pan-Pacif. Ent. 40: 165–170.Google Scholar
Chamberlin, W. J. 1958. The Scolytoidea of the Northwest. Oregon State University Press, Corvallis.Google Scholar
Fowells, H. A. 1965. Silvics of forest trees of the United States. Agric. Handb. 271. Washington, D.C. Google Scholar
Herdy, H. 1959. A method of determining the sex of adult bark beetles of the genus Conophthorus . Bi-mon. Prog. Rep. Div. Forest Biol., Ottawa 15(3): 1–2.Google Scholar
LeConte, J. L., and Horn, G. H.. 1876. Rhynchophora of America north of Mexico. Proc. Am. phil. Soc. 15: 1–455.Google Scholar
Schedl, K. E. 1949. A new species of Alniphagus (Col. Scolytidae) from Canada. Can. Ent. 81: 236.10.4039/Ent81235-9CrossRefGoogle Scholar
Swaine, J. M. 1918. Canadian bark beetles, II. A preliminary classification, with an account of the habits and means of control. Can. Dep. Agric., Ent. Br. Bull. 14. Ottawa.Google Scholar
Tate, N. L., and Bedard, W. D.. 1967. Methods of sexing live adult western pine beetles. J. econ. Ent. 60: 1688–1690.CrossRefGoogle Scholar
Worthington, N. P. 1957. Silvical characteristics of red alder. U.S. Forest Serv. Pacific Northwest Forest and Range Exp. Sta. Silvical Series 1.Google Scholar
Worthington, N. P., Ruth, R. H., and Matson, E.. 1962. Red alder — Its management and utilization. U.S. Dep. Agric. Misc. Publ. 881.Google Scholar