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Dispersal of the Pine Needle Scale, Phenacaspis pinifoliae (Fitch), (Diaspididae: Homoptera)1

Published online by Cambridge University Press:  31 May 2012

C. E. Brown
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Extract

The dispersal of the pine needle scale has long been a problem to entomologists. Although its transfer on nursery stock has been accepted as a means of dispersal, the method of its spread from tree to tree in a localized area has not been investigated previously. There are two stages in its development when it is able to move about by its own volition: the crawler or first instar nymphs wander for short distances on the twigs of the host tree and the adult males move about freely. Effective spread of this scale occurs only in the crawler stage. Phoresy is unlikely because nymphs have extreme difficulty in crossing small gaps such as would be encountered in transferring from a needle to an insect or bird and parent scales do not secrete substances attractive to carriers as described by Mahdihassan (1933) for some lac-insects. Because of the limited motility of the first instar nymphs, dissemination by wind required investigation.

Type
Articles
Information
The Canadian Entomologist , Volume 90 , Issue 11 , November 1958 , pp. 685 - 690
Copyright
Copyright © Entomological Society of Canada 1958

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References

Literature Cited

Cumming, M. E. P. 1953. Notes on the life history and seasonal development of the pine needle scale, Phenacaspis pinifoliae (Fitch) (Diaspididae: Homoptera). Canadian Ent. 85: 347–358.CrossRefGoogle Scholar
Le Baron, Wm. 1871. The white pine leaf-louse. 2nd annual report on the noxious insects of the state of Illinois, p. 83.Google Scholar
Mahdihassan, S. 1933. Sex-ratio variability and the problem of reproduction among the lac-insects. K. Akademie van Wetenschappen, Amsterdam. 36: 343–350.Google Scholar
Rabkin, F. B., and Lejeune, R. R.. 1954. Some aspects of the biology and dispersal of the pine tortoise scale, Toumeyella numismaticum (Pettit and McD.) Canadian Ent. 86(12): 570–575.Google Scholar
Riley, C. V. 1873. The pine-leaf scale-insect Mytilaspis pinifoliae (Fitch). Fifth annual report of the noxious beneficial, and other insects of the state of Missouri, p. 97.Google Scholar
Riley, C. V. 1887. Report of the entomologist for the year 1886. Govt. Printing Office, Washington, D.C. pp. 483–484.Google Scholar
Stephenson, T. C. 1952. Section Head of Aero-Dynamics of the Division of Mechanical Engineering. National Research Council, Ottawa, Canada. Personal Communication.Google Scholar
Strickland, A. H. 1950. The dispersal of Pseudococcidae (Hemiptera:Homoptera) by air currents in the Gold Coast. Proc. Roy. Ent. Soc. London (A) 25: 1–9.Google Scholar
Wellington, W. G. 1945. Conditions governing the distribution of insects in the free atmosphere. Canadian Ent. 77: 7–15, 21–28, 44–49, 69–74.Google Scholar