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Experiments on the Interrelationship Between Oleoresin Exudation Pressure in Pinus ponderosa and Attack by Ips confusus (Lec.) (Coleoptera: Scolytidae)1

Published online by Cambridge University Press:  31 May 2012

Extract

It has been observed (4) that when the first attacks of Dendroctonus monticolae Hopkins and D. brevicomis LeConte were successfully established on ponderosa pines, the trees were subsequently invaded by a large number of beetles. This abrupt rise in the attack intensity has been termed the “mass attack”. In the absence of successful initial or “pioneer” attacks the mass invasion did not occur. The successful establishment of initial attacks and the occurrence of the subsequent mass attack were found to be correlated with low oleoresin exudation pressure (o.e.p.) of the trees observed.

Type
Articles
Copyright
Copyright © Entomological Society of Canada 1962

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References

1.Anderson, R. F. 1948. Host selection by the pine engraver. Jour. Econ. Ent. 41: 596602.CrossRefGoogle Scholar
2.Person, H. L. 1931. Theory in explanation of the selection of certain trees by the western pine beetle. Jour. For. 29: 696699.Google Scholar
3.Vité, J. P. 1961. The influence of water supply on oleoresin exudation pressure and resistance to bark beetle attack in Pinus ponderosa. Contribs. Boyce Thompson Inst. 21(2), Pt. 1: 3766.Google Scholar
4.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. Contribs. Boyce Thompson Inst. 21(2), Pt. 1: 6778.Google Scholar
5.Wood, D. L., and Vité, J. P.. 1961. Studies on the host selection behaviour of Ips confusus (Lec.) (Coleoptera: Scolytidae) attacking Pinus ponderosa. Contribs. Boyce Thompson Inst. 21(2), Pt. 1: 7995.Google Scholar