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A QUANTITATIVE METHOD OF BEATING FOR SAMPLING LARVAE OF SELIDOSEMA SUAVIS (LEPIDOPTERA: GEOMETRIDAE) IN PLANTATIONS IN NEW ZEALAND

Published online by Cambridge University Press:  31 May 2012

T. C. R. White
T. C. R. White
Affiliation:
Forest Research Institute, P. B. Rotorua, New Zealand
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Abstract

By beating foliage with a stick, insects inhabiting the foliage can be dislodged onto a sheet held beneath it. In an attempt to develop this as a quantitative method for sampling lepidopterous defoliators feeding on exotic conifers in New Zealand, the size of the sheet and method of beating were standardized. Analysis of samples made over a period of 2 years revealed that differences between individual collectors were minimal, and that although very similar proportions of larvae were captured on the three areas of sheet used, the middle size gave the optimum balance between precision and cost of sampling. It also showed that as the number of larvae captured increased, the number of samples could be decreased in a semi-sequential manner.

Type
Articles
Information
The Canadian Entomologist , Volume 107 , Issue 4 , April 1975 , pp. 403 - 412
Copyright
Copyright © Entomological Society of Canada 1975

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