Hostname: page-component-8448b6f56d-dnltx Total loading time: 0 Render date: 2024-04-20T02:23:30.738Z Has data issue: false hasContentIssue false
  • English
  • Français

Host Selection and Invasion by the Douglas-fir Beetle, Dendroctonus pseudotsugae Hopkins, in Coastal Douglas-fir Forests1

Published online by Cambridge University Press:  31 May 2012

J. A. Rudinsky
J. A. Rudinsky
Affiliation:
Department of Entomology, Oregon State University, Corvallis
Get access Rights & Permissions [Opens in a new window]

Abstract

The dispersal flight of the Douglas-fir beetle, Dendroctonus pseudotsugae Hopkins, is oriented toward fresh windthrown and cut trees when these are present in the stand, the beetle being attracted by oleoresin, particularly its alpha-pinene, camphene, and limonene fractions. In the absence of such material the pioneer beetle dispersal appears to be rather uniform throughout the stand. This host attraction precedes the beetle attraction which is produced by unmated females shortly after entering the host and which results in mass concentration of beetles around the center of attraction. Of these two phases in the attraction process, the secondary attraction is far stronger than that caused by the fractions of the host oleoresin.

Attraction centers are established only in freshly downed trees and in standing trees of subnormal physiological condition under both latent and epizootic conditions; however, under epizootic conditions, the beetles can invade even vigorous trees in the perimeter of attraction. The survival of such trees depends on their ability to exude oleoresin, which in turn is influenced greatly by environmental factors. The susceptibility of trees to successful beetle invasion is characterized by their oleoresin exudation pressure, which reflects water disturbances in the tree. Diurnal and seasonal fluctuations of the resin pressure are discussed in relation to beetle flight and invasion, and the resin effects upon the beetle (both mechanical and chemical) are considered. The beetles are found to be repelled by Douglas-fir resin and its fractions, i.e. alpha- and beta-pinene, camphene, limonene, terpineol and geraniol, when tested at close range in the laboratory.

Type
Articles
Information
The Canadian Entomologist , Volume 98 , Issue 1 , January 1966 , pp. 98 - 111
Copyright
Copyright © Entomological Society of Canada 1966

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

Chapman, J. A. 1963. Field selection of different log odors by scolytid beetles. Canad. Ent. 95: 673–676.CrossRefGoogle Scholar
Chararas, C. 1962. Scolytides des conifères. Encyclopédie Entomologique 38. P. Chevalier, Paris, 556 pp.Google Scholar
Furniss, M. M. 1965. Susceptibility of fire-injured Douglas-fir to bark beetle attack in southern Idaho. J. For. 63: 8–11.Google Scholar
Hendrickson, W. H. 1965. Certain biotic factors influencing the invasion and survival of the Douglas-fir beetle, Dendroctonus pseudotsugae Hopkins (Coleoptera: Scolytidae) in fallen trees. Ph.D. dissertation, Oregon State University, Corvallis, 179 pp.Google Scholar
Jantz, O. K., 1965. Studies on the olfactory behavior of the Douglas-fire beetle, Dendroctonus pseudotsugae Hopkins. Ph.D. thesis, Oregon State University, Corvallis, 1965.Google Scholar
Jantz, O. K., and Rudinsky, J. A.. 1965. Laboratory and field methods for assaying olfactory responses of the Douglas-fir beetle, Dendroctonus pseudotsugae Hopkins. Canad. Ent. (In press.)Google Scholar
Kurth, E. F. 1944. The extraneous components of wood. In Wood Chemistry, pp. 385–445. (Reinhold Publishing Corporation, New York, 900 pp.)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). Canad. Ent. 94: 1309–1325.CrossRefGoogle Scholar
Rudinsky, J. A. 1947. Makro- and mikroanatomische Unterscheidungsmerkmale der mittel-europäischen und einiger eingebauten Hölzer. Dissertation vorbereited für die Natur-wissenschaftliche Fakultät der UNRRA-Universität, München. Teil I, 84 S., Mikroanatomischer Atlas, 93 S.Google Scholar
Rudinsky, J. A. 1961. Developments in forest pest research at Oregon State University. Proc. Ann. Meeting West. Forest Pest Committee, pp. 14–15.Google Scholar
Rudinsky, J. A. 1962a. Factors affecting the population density of bark beetles. Proc. Intern. Union Forest Res. Organ. 13th Congr., Vienna, 1961, Teil 2, Band I, 24–11, 13 pp.Google Scholar
Rudinsky, J. A. 1962b. Ecology of Scolytidae. Annu. Rev. Ent. 7: 327–348.CrossRefGoogle Scholar
Rudinsky, J. A. 1963. Response of Dendroctonus pseudotsugae Hopkins to volatile attractants. Contr. Boyce Thompson Inst. 22: 23–38.Google Scholar
Smith, R. H. 1961. The fumigant toxicity of three pine resins to Dendroctonus brevicomis and D. jeffrei. J. econ. Ent. 54: 365–369.Google Scholar
Stark, R. W. 1965. Recent trends in forest entomology. Annu. Rev. Ent. 10: 303–324.CrossRefGoogle Scholar
Vité, J. P. 1961. The influence of water supply on oleoresin exudation pressure and resistance to bark beetle attack in Pinus ponderosa. Contr. Boyce Thompson Inst. 21: 37–66.Google Scholar
Vité, J. P., and Gara, R. I.. 1962. Volatile attractants from ponderosa pine attacked by bark beetles (Coleoptera: Scolytidae). Contr. Boyce Thompson Inst. 21: 251–274.Google Scholar
Vité, J. P., and Rudinsky, J. A.. 1962. Investigations on the resistance of conifers to bark beetle infestation. Proc. Intern. Congr. Ent., 11th Vienna, 1960, 2: 219–225.Google Scholar
Vité, J. P., and Wood, D. L.. 1961. A study on the applicability of the measurement of oleoresin exudation pressure in determining susceptibility of second growth ponderosa pine to bark beetle infestation. Contr. Boyce Thompson Inst. 21: 67–78.Google Scholar