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FACTORS AFFECTING THE TEMPORAL DISTRIBUTION OF THE SPRING FLIGHT OF THE EUROPEAN CORN BORER, OSTRINIA NUBILALIS (LEPIDOPTERA: PYRALIDAE)

Published online by Cambridge University Press:  31 May 2012

D. G. R. McLeod
Affiliation:
Research Centre, Agriculture Canada, London, Ontario N6A 5B7

Abstract

A multiple regression analysis was used to establish which weather factors and population parameters were important in determining the emergence pattern of the spring flight of the European corn borer, Ostrinia nubilalis (Hbn.), as measured by light trap catches. Equations which estimated the slope and intercept of a line representing the probit of cumulative percentage emergence vs. degree days had as independent variables the intercept of the previous year’s regression line and the average temperature for the preceding September, December, February, and April. A comparison of methods used to estimate the emergence pattern showed that the average deviation of the average date method was 5.0 days, the average slope and intercept method 2.8 days, and multiple regression method 1.6 days.

Résumé

Une analyse de regression multiple a été utilisée pour établir quels facteurs métérologiques et quels paramètres de la population étaient importants dans la détermination du modèle de l’envol printanier de la pyrale du maïs Ostrinia nubilalis (Hbn) captée dans des pièges lumineux. Les équations qui estimaient la pente et l’intercepte d’une droite représentant le probit du pourcentage cumulatif de l’émergence en fonction des degrés-jours avaient comme variables indépendantes l’intercepte de la date de regression pour l’année précédente et la température moyenne des mois de septembre, décembre, février et avril précédents. Une comparaison entre les méthodes utilisées pour estimer le modèle d’émergence a démontré que la déviation moyenne a été de cinq jours selon la méthode de la date moyenne, 2.8 jours selon la méthode de la pente et de l’intercepte moyens et 1.6 jours selon la méthode de la regression multiple.

Type
Articles
Copyright
Copyright © Entomological Society of Canada 1981

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