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SAMPLING PROCEDURES FOR WITHIN-TREE ATTACKING ADULT POPULATIONS OF THE SOUTHERN PINE BEETLE, DENDROCTONUS FRONTALIS (COLEOPTERA: SCOLYTIDAE)1

Published online by Cambridge University Press:  31 May 2012

P. E. Pulley ,
John L. Foltz ,
Adil M. Mayyasi ,
Robert N. Coulson  and
W. C. Martin
P. E. Pulley
Affiliation:
Texas A&M University, College Station
John L. Foltz
Affiliation:
Texas A&M University, College Station
Adil M. Mayyasi
Affiliation:
Texas A&M University, College Station
Robert N. Coulson
Affiliation:
Texas A&M University, College Station
W. C. Martin
Affiliation:
Texas A&M University, College Station
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Abstract

Quantitative sampling schemes for estimating within-tree populations of attacking Dendroctonus frontalis Zimmerman were investigated. Accuracy and precision of five small sample procedures were affected by the number and location of the sample heights, the number of sample disks per sample height, and the techniques used for calculating infested surface area and average insect density. Best small sample estimates were obtained from samples near the middle of the infested bole. Unbiased, minimum variance combinatorials were derived. High precision estimates were obtained only by sampling the infested bole at frequent intervals.

Type
Articles
Information
The Canadian Entomologist , Volume 109 , Issue 1 , January 1977 , pp. 39 - 48
Copyright
Copyright © Entomological Society of Canada 1977

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