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Analysis of a Population Sampling Method for the Lodgepole Needle Miner in Canadian Rocky Mountain Parks1

Published online by Cambridge University Press:  31 May 2012

R. W. Stark
Affiliation:
Laboratory of Forest Zoology, Calgary, Alberta

Extract

General.—The purpose of this paper is to analyse a sampling method devised to assess larval populations in an outbreak of the lodgepole needle miner, Recurvaria milleri Busck (Busck 1914, Hopping 1945).

The problem of developing an adequate sampling method is intimately concerned with the life-history of the insect, the region of the outbreak and the nature of the forest stand in which the outbreak occurs. In sampling most defoliator populations the problem is made more difficult by external feeding and wandering habits, hence it is usually done in some relatively inactive stage at a fixed time. de Gryse (1934) describes the problems inherent in sampling these insects. The needle miner, however, is fixed in its location for most of its life-cycle and is therefore readily obtainable for study. The problem here is reduced to a statistical one, that of obtaining an acceptable sample i.e. within suitable error limits with due regard for existing variables.

Type
Articles
Copyright
Copyright © Entomological Society of Canada 1952

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References

Busck, August (1914). Description of New Microlepidoptera of Forest Trees. Proc. Ent. Soc. of Wash. 16 (4) p. 143150 pls. 7, 8.Google Scholar
de Gryse, J. J. (1934). Quantitative Methods in the Study of Forest Insects. Sci. Agric. 14 (9) p. 477495.Google Scholar
Hopping, G. R. (1945). The Lodgepole Needle Miner in the Canadian Rocky Mountain Parks (Lepidoptera: Gelechiidae). Proc. Ent. Soc. of B.C. 42.Google Scholar
Hopping, G. R. (1946). The Lodgepole Needle Miner in Western Canadian Parks. Science Service, Dept. of Agric. Div. of Entom. Proc. Publ. No. 59, Ottawa.Google Scholar
Graham, K. and Shepherd, R. (1951). Population Measurement of the Lodgepole Needle Miner and its Parasites. Bi-monthly Progress Report, Dept. Agric. Science Sevice, Div. of Forest Biology 7 (4) July-Aug.Google Scholar