Hostname: page-component-586b7cd67f-gb8f7 Total loading time: 0 Render date: 2024-11-24T18:20:57.520Z Has data issue: false hasContentIssue false

ATTRACTIVENESS OF LOGS CONTAINING FEMALE SPRUCE BEETLES, DENDROCTONUS OBESUS (COLEOPTERA: SCOLYTIDAE)

Published online by Cambridge University Press:  31 May 2012

E. D. A. Dyer
Affiliation:
Forest Research Laboratory, Department of Forestry and Rural Development, Victoria, British Columbia
D. W. Taylor
Affiliation:
Forest Research Laboratory, Department of Forestry and Rural Development, Victoria, British Columbia

Abstract

Field studies were carried out on effect of attack by unmated spruce beetles, Dendroctonus obesus (Mann.) on log attractiveness. Test logs were screen-covered or sprayed with insecticide. Trays beneath logs, with glass-barrier traps beside them, were used to measure response of beetles from natural populations.

About 89% of the beetles attracted at six replicate sites were taken at logs containing introduced females. Males always predominated in responses to these logs. After the initial flight, about equal numbers of each sex responded to logs without introduced females. Response to the latter dropped to a low level after the initial flight, but beetles continued to respond well to logs attacked by females throughout the flight period. Use of increased attractiveness to logs following introduction of female beetles shows promise as a means of studying, directing, or controlling infestations of the spruce beetle.

Résumé

Des expériences ont été effectuées en forêt afin de déterminer l’attrait exercé sur le Dendroctone de l’Epinette de Sitka (Dendroctonus obesus (Mannerheim)) par les billes contenant des femelles vierges de cet insecte. Les billes d’essai furent couvertes d’un grillage ou arrosées d’insecticide. Sous les billes, des cuvettes, flanquées de pièges munis d’un portillon de verre servaient à mesurer la réaction des Dendroctones provenant de populations naturelles.

Dans les six lieux examinés, les billes où des femelles avaient déjà été introduites contenaient environ 89 p. 100 de tous les insectes attrapés et, parmi ceux-ci, les mâles y étaient toujours plus nombreux que les femelles. Dans les billes-témoins, par contre, à peu près le même nombre de mâles et de femelles était présent après le premier vol. Là, plus tard, il y avait une diminution du nombre d’insectes attrapés, alors que dans les billes où les femelles avaient déjà été introduites, la récolte était bonne pendant toute la période du vol. Le fait que les billes déjà attaquées par les femelles attirent plus fortement le Dendroctone de l’Epinette de Sitka se révélera utile pour ceux qui voudront étudier, contrôler et réprimer les infestations de cet insecte.

Type
Articles
Copyright
Copyright © Entomological Society of Canada 1968

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Anderson, R. F. 1948. Host selection by the pine engraver. J. econ. Ent. 41: 596602.CrossRefGoogle Scholar
Chapman, J. A. 1966. The effect of attack by the ambrosia beetle Trypodendron lineatum (Olivier) on log attractiveness. Can. Ent. 98: 5059.CrossRefGoogle Scholar
Chapman, J. A. 1967. Response behaviour of scolytid beetles and odour meteorology. Can. Ent. 99: 11321137.CrossRefGoogle Scholar
Chapman, J. A., and Kinghorn, J. M.. 1958. Studies of flight and attack activity of the ambrosia beetle, Trypodendron lineatum (Oliv.), and other scolytids. Can. Ent. 90: 362372.CrossRefGoogle Scholar
Gara, R. I., Vité, J. P., and Cramer, H. H.. 1965. Manipulation of Dendroctonus frontalis Zimm. by use of a population aggregating pheromone. Contr. Boyce Thompson Inst. Pl. Res. 23: 5566.Google Scholar
Hopkins, A. D. 1909. Practical information on the scolytid beetles of North American forests. I. Bark beetles of the genus Dendroctonus. Bull. U.S. Bur. Ent., No. 83.Google Scholar
Knight, F. B. 1960. Measurement of Engelmann spruce beetle populations. Ecology 41: 249252.CrossRefGoogle Scholar
Massey, C. L., and Wygant, N. D.. 1954. Biology and control of the Engelmann spruce beetle in Colorado. Circ. U.S. Dep. Agric., No. 944.Google Scholar
McMullen, L. H., and Atkins, M. D.. 1962. On the flight and host selection of the Douglas fir beetle, Dendroctonus pseudotsugae Hopk. (Coleoptera: Scolytidae). Can. Ent. 94: 13091325.CrossRefGoogle Scholar
Nagel, R. H., McComb, D., and Knight, F. B.. 1957. Trap tree method for controlling the Engelmann spruce beetle in Colorado. J. For. 55: 894898.Google Scholar
Pitman, G. B., Renwick, J. A. A., and Vité, J. P.. 1966. Studies on the pheromone of Ips confusus (LeConte). IV. Isolation of the attractive substance by gas–liquid chromatography. Contr. Boyce Thompson Inst. Pl. Res. 23: 243250.Google Scholar
Rudinsky, J. A. 1963. Response of Dendroctonus pseudotsugae Hopkins to volatile attractants. Contr. Boyce Thompson Inst. Pl. Res. 22: 2338.Google Scholar
Rudinsky, J. A., and Daterman, G. E.. 1964. Field studies on flight patterns and olfactory responses of ambrosia beetle in Douglas fir forests of western Oregon. Can. Ent. 96: 13391352.CrossRefGoogle Scholar
Swaine, J. M. 1924. The control of the destructive spruce bark beetle in eastern Canada. Pam. Can. Dep. Agric., No. 48 (n.s.).Google Scholar
Watson, E. B. 1928. The bionomics of the spruce bark beetle Dendroctonus piceaperda Hopk. Scient. Agric. 3: 613635.Google Scholar
Wood, D. L., and Vité, J. P.. 1961. Studies on the host selection behaviour of Ips confusus (LeConte) (Coleoptera: Scolytidae) attacking Pinus ponderosa. Contr. Boyce Thompson Inst. Pl. Res. 21: 7995.Google Scholar
Wood, S. L. 1963. A revision of the bark beetle genus Dendroctonus Erichson (Coleoptera: Scolytidae). Gt Basin Nat. 23: 1117.Google Scholar