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SAMPLING LEAVES TO ESTIMATE THE DENSITY OF BROWN MITE, BRYOBIA RUBRIOCULUS (ACARINA: TETRANYCHIDAE), ON APPLES1

Published online by Cambridge University Press:  31 May 2012

H. J. Herbert ,
D. Hamilton  and
G. Gabor
H. J. Herbert
Affiliation:
Research Station, Agriculture Canada, Kentville, Nova Scotia B4N 1J5
D. Hamilton
Affiliation:
Department of Mathematics, Statistics and Computing Science, Dalhousie University, Halifax B3H 4H8
G. Gabor
Affiliation:
Department of Mathematics, Statistics and Computing Science, Dalhousie University, Halifax B3H 4H8
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Abstract

In the first generation brown mite, Bryobia rubrioculus (Scheuten), on apple inhabits the wood as well as the leaves. To eliminate sampling the wood, which is very tedious and time consuming, equations were developed to describe the total population of immature stages and adults from observations of the number of mites on the leaves alone.

Résumé

Au cours de la première génération, le tétranyque brun du pommier, Bryobia rubrioculus (Scheuten), se retrouve aussi bien sur le bois que sur les feuilles. Pour éviter l'échantillonnage du bois qui est une tâche très longue et fastidieuse, on a élaboré des équations pour décrire la population totale de spécimens des stades immatures et d'adultes à partir d'observations du nombre de tétranyques trouvés sur les seules feuilles.

Type
Articles
Information
The Canadian Entomologist , Volume 115 , Issue 9 , September 1983 , pp. 1229 - 1231
Copyright
Copyright © Entomological Society of Canada 1983

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References

Henderson, C. F. and McBurnie, H. V.. 1943. Sampling techniques determining populations of the citrus red mite and its predators. U.S. Dep. Agric. Circ. 671.Google Scholar
Herbert, H. J. 1962. Life history and habits of the brown mite, Bryobia arborea M. & A. (Acarina: Tetranychidae) on apples in Nova Scotia. Can. Ent. 94: 934–941.Google Scholar
Herbert, H. J. 1965. The brown mite, Bryobia arborea Morgan and Anderson (Acarina: Tetranychidae), on apples in Nova Scotia. I. Influence of intratree distribution on the selection of sampling units. II. Differences in habits and seasonal trends in orchards with bivoltine and trivoltine populations. III. Distribution of diapause eggs. IV. Hatching of diapause eggs. Can. Ent. 97: 1303–1318.Google Scholar
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