Canadian Forest Service Publications

A sequential sampling system for the white pine weevil, Pissodes strobi (Coleoptera: Curculionidae) 1995. Alfaro, R.I. Journal of the Entomological Society of British Columbia 92: 39-43.

Year: 1995

Available from: Pacific Forestry Centre

Catalog ID: 4234

Language: English

CFS Availability: Order paper copy (free), PDF (request by e-mail)

Abstract

A sequential sampling system is described for determining degree of infestation by the white pine weevil, Pissodes strobi Peck, in stands of spruce, Picea spp. The method requires that a maximum of 60 trees be randomly selected in sequence and that the cumulative number of infested trees be plotted against the total number of trees sampled. Sampling is stopped as soon as decision lines calculated for < 10% infestation or ≥ 20% infestation are crossed.

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