Hostname: page-component-78c5997874-ndw9j Total loading time: 0 Render date: 2024-11-20T01:04:04.540Z Has data issue: false hasContentIssue false
  • English
  • Français

A Sequential Sampling Technique for Surveys of the Larch Sawfly1

Published online by Cambridge University Press:  31 May 2012

W. G. H. Ives  and
R. M. Prentice
Get access Rights & Permissions [Opens in a new window]

Extract

Sequential sampling methods have been developed for population surveys of a number of forest insects (4, 6, 7, 9). These methods permit rapid classification of populations into broad infestation classes with predetermined accuracy and a minimum of sampling, and are useful for mapping and recording widespread infestations.

The method of assessing egg populations of the larch sawfly, Pristiphora erichsonii (Htg.), developed by Ives (3) for intensive population studies, was not suitable for surveys because of the large sample size required. A sequential plan for the larch sawfly using hypothetical infestation classes was briefly reviewed by Ives (2). This plan is modified in the present paper in accordance with new data that have accumulated from observations on plots in the Whiteshell Forest Reserve and other stands in Manitoba and Saskatchewan.

Type
Articles
Information
The Canadian Entomologist , Volume 90 , Issue 6 , June 1958 , pp. 331 - 338
Copyright
Copyright © Entomological Society of Canada 1958

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

1.Armitage, P.Sequential analysis with more than two alternative hypotheses, and its relation to discriminant function analysis. Jour. Roy. Stat. Soc. Series B. 12: 137–144. 1950.Google Scholar
2.Ives, W. G. H.Sequential sampling of insect populations. Forestry Chron. 30: 287–291. 1954.CrossRefGoogle Scholar
3.Ives, W. G. H.Estimation of egg populations of the larch sawfly, Pristiphora erichsonii (Htg.). Can. J. Zool. 33: 370–388. 1955.CrossRefGoogle Scholar
4.Morris, R. F.Sequential sampling for spruce budworm egg surveys. Can. J. Zool. 32: 302–313. 1954.CrossRefGoogle Scholar
5.Oakland, G. B.Sequential analysis. Processed publication, Biometrics Unit, Science Service, Can. Dept. Agr., Ottawa. 1951.Google Scholar
6.Reeks, W. A.Sequential sampling of the winter moth, Operophtera brumata (Linn.) Can. Ent. 88: 241–246. 1956.CrossRefGoogle Scholar
7.Stark, R. W.Sequential sampling of the lodgepole needle miner. Forestry Chron. 28: 57–60. 1952.Google Scholar
8.Wald, A.Sequential analysis. 2nd Ed.John Wiley and Sons, Inc. New York.Google Scholar
9.Waters, W. E.Sequential sampling in forest insect surveys. Forest Science 1: 69–79. 1955.Google Scholar