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The Olfactory Response of Ips confusus (LeConte) (Coleoptera: Scolytidae) to the Secondary Attraction in the Laboratory1

Published online by Cambridge University Press:  31 May 2012

D. L. Wood  and
R. W. Bushing
D. L. Wood
Affiliation:
Respectively, Assistant Entomologist and Laboratory Technician, Department of Entomology and Parasitology, University of California, Berkeley.
R. W. Bushing
Affiliation:
Respectively, Assistant Entomologist and Laboratory Technician, Department of Entomology and Parasitology, University of California, Berkeley.
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Abstract

A highly sensitive bioassay of the olfactory response of I. confusus is described. The response of beetles to air streams carrying attractants is a chemoklinotaxis but positive orientation occurs only in moving air. There is no evidence of ameno-taxis in odorless air streams or orientation to attractants in still air. Male behavior is characterized by an “area” orientation near the attractive material, an indirect approach to the source as shown by their entering adjacent air channels, and stopping frequently in the traverse during which they make klinotactic movements. The females exhibit a “point” or “straight-line” response, crawling directly to the source, rarely deviating into adjacent channels and only occasionally interrupting their approach.

Bark-wood samples of ponderosa pine become attractive 4-6 hours after male beetles are introduced into preformed entrance tunnels, the peak attraction occurring between 18 and 144 hours. Frass is not attractive until 9-12 hours after introduction of males. The ratio of females to males responding positively during the peak attraction period was approximately 8:5. The level of attractiveness to females falls as the season progresses, the highest response being recorded in late May and June. Sexual maturity as judged by the appearance of motile sperm was not correlated with host feeding or the initiation of attraction. Frass of males boring in Douglas fir was unattractive to females.

Attraction is initiated by male feeding in the phloem-cambial tissue of a host and is delayed until the first food has passed through the gut. The attractant appears to be associated with male excrement and may be produced, at least in part, in the hindgut.

Type
Articles
Information
The Canadian Entomologist , Volume 95 , Issue 10 , October 1963 , pp. 1066 - 1078
Copyright
Copyright © Entomological Society of Canada 1963

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References

Anderson, J. M., and Fisher, K. C.. 1960. The response of the white pine weevil to naturally occurring repellents. Canad. J. Zool. 38: 547–564.CrossRefGoogle Scholar
Atkins, M. D. 1961. A study of the flight of the Douglas-fir beetle, Dendroctonus pseudotsugae Hopk. (Coleoptera: Scolytidae). III. Flight Capacity. Canad. Ent. 93: 467–474.CrossRefGoogle Scholar
Chapman, J. A. 1962. Field studies on the attack flight and log selection by the ambrosia beetle, Trypodendron lineatum (Oliv.) (Coleoptera: Scolytidae). Canad. Ent. 94: 74–92.CrossRefGoogle Scholar
Fraenkel, G. S., and Gunn, D. L.. 1940. The orientation of animals. Clarendon, Oxford. 352 pp.Google Scholar
Graham, K. 1959. Release by flight exercise of a chemotropic response from photopositive domination in a scolytid beetle. Nature, Lond. 184: 283–284.CrossRefGoogle Scholar
Hierholzer, O. 1950. Ein Beitrage zur Fräge der Orientierung von Ips curvidens Germ. Zeitschr. Tierpsychol. 7: 588–620.CrossRefGoogle Scholar
Hopf, H. S. 1937. Protein digestion of wood-boring insects. Nature, Lond. 139: 286–287.Google Scholar
Kramer, P. J., and Kozlowski, T. T.. 1960. Physiology of trees. McGraw-Hill, New York, Toronto and London. 642 pp.Google Scholar
Lipke, H., and Fraenkel, G.. 1956. Insect nutrition. Ann. Rev. Ent. 1: 17–44.CrossRefGoogle 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). Canad. Ent. 94: 1309–1324.CrossRefGoogle Scholar
Miller, J. M., and Keen, F. P.. 1960. Biology and control of the western pine beetle. U.S. Dept. Agr. Misc. Publ. 800: 381 pp.Google Scholar
Perttunen, V. 1957. Reactions of two bark beetle species Hylurgops palliatus Gyll. and Hylastes ater Payk. (Col., Scolytidae) to the terpene a-pinene. Ann. Ent. Fenn. 23: 101–110.Google Scholar
Perttunen, V. 1960. Seasonal variation in the light reactions of Blastophagus piniperda L. (Col., Scolytidae) at different temperatures. Ann. Ent. Fenn. 26: 86–92.Google Scholar
Perttunen, V., and Ahonen, U.. 1956. The effect of age on the humidity reaction of Drosophila melanogaster (Dipt., Drosophilidae). Ann. Ent. Fenn. 22: 63–71.Google Scholar
Vité, J. P., and Gara, R. I.. 1961. A field method for observation on olfactory responses of bark beetles (Scolytidae) to volatile materials. Contrib. Boyce Thompson Inst. 21: 175–182.Google Scholar
Vité, J. P., and Gara, R. I.. 1962. Volatile attractants from ponderosa pine attacked by bark beetles (Coleoptera: Scolytidae). Contrib. Boyce Thompson Inst. 21: 251–273.Google Scholar
Wellington, W. G. 1957a. The synoptic approach to studies of insects and climate. Ann. Rev. Ent. 2: 143–162.CrossRefGoogle Scholar
Wellington, W. G. 1957b. Individual differences as a factor in population dynamics: the development of a problem. Canad. J. Zool. 35: 293–323.Google Scholar
Wigglesworth, V. B. 1953. The principles of insect physiology. Methuen, London. 546 pp.Google Scholar
Wood, D. L. 1962. The attraction created by males of a bark beetle, Ips confusus (LeConte) (Coleoptera: Scolytidae) attacking ponderosa pine. Pan-Pacif. Ent. 38: 141–145.Google Scholar
Wood, D. L. 1963. Studies on host selection by Ips confusus (LeConte) (Coleoptera: Scolytidae) with special reference to Hopkins' host selection principle. Univ. Calif. Publ. Ent. 27: 241–282.Google Scholar
Wood, D. L., and Vité, J. P.. 1961. Studies on the host selection behavior of Ips confusus (LeConte) (Coleoptera: Scolytidae) attacking Pinus ponderosa. Contrib. Boyce Thompson Inst. 21: 79–96.Google Scholar