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SAMPLING SYSTEMS FOR EUROPEAN RED MITE, PANONYCHUS ULMI (ACARINA: TETRANYCHIDAE), EGGS ON APPLE IN NOVA SCOTIA1

Published online by Cambridge University Press:  31 May 2012

H. J. Herbert  and
K. P. Butler
H. J. Herbert
Affiliation:
Research Station, Canada Department of Agriculture, Kentville, Nova Scotia
K. P. Butler
Affiliation:
Research Station, Canada Department of Agriculture, Kentville, Nova Scotia
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Abstract

A study was conducted in a mature apple orchard in Nova Scotia to compare the density of eggs of the European red mite, Panonychus ulmi (Koch), over the whole tree to their density on a selected area using a random selection and standard selection technique. Both methods provided nearly equivalent estimates of population densities for generations 2 and 4 but not for generation 3. The population estimates based on sampling from the selected area overestimated the whole tree population.

Optimum allocation of sampling resources may be obtained by sampling a small number of clusters from each of a large number of trees.

Type
Articles
Information
The Canadian Entomologist , Volume 105 , Issue 12 , December 1973 , pp. 1519 - 1523
Copyright
Copyright © Entomological Society of Canada 1973

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References

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