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SOLUTION SEPARATION AND MAXIMUM LIKELIHOOD DENSITY ESTIMATES OF HEMLOCK LOOPER (LEPIDOPTERA: GEOMETRIDAE) EGGS IN MOSS

Published online by Cambridge University Press:  31 May 2012

R. F. Shepherd  and
T. G. Gray
R. F. Shepherd
Affiliation:
Pacific Forest Research Centre, Canadian Forestry Service, Victoria, British Columbia
T. G. Gray
Affiliation:
Pacific Forest Research Centre, Canadian Forestry Service, Victoria, British Columbia
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Abstract

Counting hemlock looper (Lambditm fiscellaria lugnbrosa) eggs attached to moss samples is tedious and inaccurate. Moss samples treated with a 0.5% NaOH solution for 1 minute releases the eggs, which can be washed and filtered out of the moss. Other debris can be separated through differential flotation with 15% NaCl solution. Three such washings provide data for analysis with the maximum likelihood method, producing density estimates with low-standard errors.

Type
Articles
Information
The Canadian Entomologist , Volume 104 , Issue 5 , May 1972 , pp. 751 - 754
Copyright
Copyright © Entomological Society of Canada 1972

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References

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