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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
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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

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References

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