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MULTIVARIATE ANALYSIS OF THE POPULATION STRUCTURE OF SITONA HISPIDULUS (COLEOPTERA: CURCULIONIDAE) IN ALFALFA FIELD SOIL

Published online by Cambridge University Press:  31 May 2012

M.A. Quinn  and
A.A. Hower
M.A. Quinn
Affiliation:
Department of Entomology, The Pennsylvania State University, University Park, Pennsylvania, USA 16802
A.A. Hower
Affiliation:
Department of Entomology, The Pennsylvania State University, University Park, Pennsylvania, USA 16802
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Abstract

The multivariate statistical techniques of canonical correlation and canonical redundancy analyses were used to assess the population structure of larvae of Sitona hispidulus (F.) in alfalfa field soil. A series of rhizosphere variables was correlated with a series of insect variables that represented the developmental stages of the insect to identify relationships between the insect and rhizosphere. Results indicated that 1st and 2nd-instar larvae were correlated with small root nodules and soil moisture, but not with taproot biomass. Third- and 4th-instar larvae and pupae were not correlated with any of the rhizosphere components measured. Fifth-instar larvae were associated with taproot biomass.

Résumé

On a utilisé les techniques multivariables de la corrélation canonique et de la redondance canonique afin d’étudier la structure des populations des larves de Sitona hispidulus (F.) dans le sol d’une luzemière. On a déterminé la corrélation entre un ensemble de variables de la rhizosphère et un ensemble de variables se rapportant au stade de développement de l’insecte, afin de mettre en lumière les relations entre la rhizosphère et l’insecte. Les résultats indiquent que les larves de 1er et 2ième stades sont corrélées aux nodules des racines et à l’humidité du sol, et non pas avec la biomasse des racines pivotantes. Les larves de 3ième et 4ième stades et les pupes ne sont corrélées avec aucune des composantes mesurées de la rhizosphère. Les larves de 5ième stade sont associées à la biomasse des racines pivotantes.

Type
Articles
Information
The Canadian Entomologist , Volume 118 , Issue 6 , June 1986 , pp. 517 - 524
Copyright
Copyright © Entomological Society of Canada 1986

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