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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

Henderson, C. F. and McBurnie, H. S.. 1943. Sampling technique for determining populations of the citrus red mite and its predators. U.S. Dep. Agric. Circ. 671.Google Scholar
Herbert, H. J. 1970. Biological limits of each stage in populations of the European red mite, Panonychus ulmi (Koch). Can. Ent. 102: 64–68.Google Scholar
Herbert, H. J. and Butler, K. P.. 1973. Distribution of phytophagous and predacious mites of apple trees in Nova Scotia. Can. Ent. 105: 271–276.CrossRefGoogle Scholar
LeRoux, E. J. and Reimer, C.. 1959. Variation between samples of immature stages, and of mortalities from some factors, of the eye-spotted bud moth, Spilonofa ocellana (D. & S.) (Lepidoptera: Olethreutidae), and the pistol casebearer, Coleophora serratella (L.) (Lepidoptera: Coleophoridae), on apple in Quebec. Can. Ent. 91: 428–449.Google Scholar
Lord, F. T. 1965. Sampling predator populations on apple trees in Nova Scotia. Can. Ent. 97: 287–298.Google Scholar
Sanford, K. H. and Herbert, H. J.. 1970. The influence of spray programs on the fauna of apple orchards in Nova Scotia. XX. Trends after altering levels of phytophagous mites or predators. Can. Ent. 102: 592–601.CrossRefGoogle Scholar
Taylor, L. R. 1961. Aggregation, variance, and the mean. Nature, Lond. 189: 732–735.CrossRefGoogle Scholar
Westigard, P. H. and Calvin, L. D.. 1971. Estimating mite populations in southern Oregon pear orchards. Can. Ent. 103: 67–71.CrossRefGoogle Scholar
Williams, E. J. 1959. Regression analysis. Wiley, New York.Google Scholar