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A Comparison of Radiograph Analysis and Bark Dissection in Estimating Numbers of Western Pine Beetle1

Published online by Cambridge University Press:  31 May 2012

C. J. DeMars Jr.
C. J. DeMars Jr.
Affiliation:
Agriculture Experiment Station, University of California, Berkeley, California
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Abstract

Estimates of the numbers of the western pine beetle, Dendroctonus brevicomis LeConte, in Pinus ponderosa Laws, bark samples were made by radiographs of 25 bark samples and by dissection counts of the bark. High correlations (r = >.9) between the two methods were found for (a) live larvae, (b) live plus dead larvae, (c) live of all stages combined, and (d) live plus dead of all stages combined. The bark dissection method took eight times as long and was 4⅓ times as expensive as the radiographic interpretation method of estimating bark beetle numbers.

Type
Articles
Information
The Canadian Entomologist , Volume 95 , Issue 10 , October 1963 , pp. 1112 - 1116
Copyright
Copyright © Entomological Society of Canada 1963

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References

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