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SEQUENTIAL SAMPLING OF ADULT COCCINELLA SEPTEMPUNCTATA L. IN WHEAT FIELDS

Published online by Cambridge University Press:  31 May 2012

G. Iperti
Affiliation:
INRA, Station de Zoologie et de Lutte Biologique, 37, Boulevard du Cap, 06600 AntibesFrance
L. Lapchin
Affiliation:
INRA, Station de Zoologie et de Lutte Biologique, 37, Boulevard du Cap, 06600 AntibesFrance
A. Ferran
Affiliation:
INRA, Station de Zoologie et de Lutte Biologique, 37, Boulevard du Cap, 06600 AntibesFrance
J.-M. Rabasse
Affiliation:
INRA, Station de Zoologie et de Lutte Biologique, 37, Boulevard du Cap, 06600 AntibesFrance
J.-P. Lyon
Affiliation:
INRA, Station de Zoologie et de Lutte Biologique, 37, Boulevard du Cap, 06600 AntibesFrance

Abstract

A sequential sampling program was designed for Coccinella septempunctata L. adults in wheat fields, based on a rapid visual counting method. This program takes into account the spatial heterogeneity of coccinellids and the efficiency of the counting method. The relationship between the mean and variance of the numbers sampled was described by Taylor’s power law.

Résumé

Une procédure d’échantillonnage séquentiel des adultes de Coccinella septempunctata L. en cultures de blé, basée sur une méthode visuelle rapide de dénombrement, a été concue. Elle tient compte à la fois de l’hétérogénéité des répartitions spatiales des coccinelles et de l’efficacité de la méthode de dénombrement. La relation entre moyenne et variance des échantillons s’appuie sur la loi puissance de Taylor.

Type
Articles
Copyright
Copyright © Entomological Society of Canada 1988

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