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REGRESSION FOR ESTIMATING NUMBER OF DOUGLAS-FIR TUSSOCK MOTH EGGS RELATIVE TO EGG MASS WEIGHT1

Published online by Cambridge University Press:  31 May 2012

Roy C. Beckwith ,
R. R. Mason  and
H. G. Paul
Roy C. Beckwith
Affiliation:
Pacific Northwest Forest and Range Experiment Station, Forest Service, U.S. Department of Agriculture, Corvallis, Oregon 97331
R. R. Mason
Affiliation:
Pacific Northwest Forest and Range Experiment Station, Forest Service, U.S. Department of Agriculture, Corvallis, Oregon 97331
H. G. Paul
Affiliation:
Pacific Northwest Forest and Range Experiment Station, Forest Service, U.S. Department of Agriculture, Corvallis, Oregon 97331
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Abstract

A common regression equation, representing data collected from four widely separated areas, was constructed to determine number of eggs of the Douglas-fir tussock moth based on individual egg mass weights. The regression is designed for use in any egg mass sampling scheme where a knowledge of the potential early instar population is required. The regression equation is also given for each area.

Type
Articles
Information
The Canadian Entomologist , Volume 110 , Issue 2 , 01 February 1978 , pp. 131 - 134
Copyright
Copyright © Entomological Society of Canada 1978

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References

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