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QUANTITATIVE DESCRIPTION OF THE INFLUENCE OF FLUCTUATING TEMPERATURES ON THE REPRODUCTIVE BIOLOGY AND SURVIVAL OF THE WESTERN CORN ROOTWORM, DIABROTICA VIRGIFERA VIRGIFERA LECONTE (COLEOPTERA: CHRYSOMELIDAE)

Published online by Cambridge University Press:  31 May 2012

N.C. Elliott ,
D.R. Lance  and
S.L. Hanson
N.C. Elliott
Affiliation:
U.S. Department of Agriculture, Agricultural Research Service, Northern Grain Insects Research Laboratory, Brookings, South Dakota, USA 57006
D.R. Lance
Affiliation:
U.S. Department of Agriculture, Agricultural Research Service, Northern Grain Insects Research Laboratory, Brookings, South Dakota, USA 57006
S.L. Hanson
Affiliation:
U.S. Department of Agriculture, Agricultural Research Service, Northern Grain Insects Research Laboratory, Brookings, South Dakota, USA 57006
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Abstract

Adult corn rootworm beetles, Diabrotica virgifera virgifera LeConte, were maintained at five fluctuating temperature regimens with daily average temperatures of 16.0, 19.5, 23.0, 26.5, and 30.0°C. The mean number of eggs laid per female was greatest (602) at 26.5°C and least (295) at 16.0°C. The median length of life decreased with increasing temperature from 13.8 weeks at 19.5°C to 7.9 weeks at 30.0°C. Parameters were estimated for nonlinear functions relating age-specific fecundity and age-specific survival to physiological age.

Résumé

Des adultes de la chrysomèle des racines Diabrotica virgifera virgifera LeConte ont été maintenus sous cinq régimes de température fluctuante dont la moyenne était de 16,0, 19,5, 23,0, 26,5 ou 30,0°C. La moyenne du nombre maximum d’oeufs pondus par femelle (602) a été obtenue à 26,5°C et celle du nombre minimal (295) à 16,0°C. La longévité médiane à diminué avec l’augmentation de la température, passant de 13,8 semaines à 19,5°C, à 7,9 semaines à 30,0°C. On a estimé les paramètres de fonctions non linéaires reliant la fécondité et la survie spécifiques de l’âge, à l’âge physiologique de l’insecte.

Type
Articles
Information
The Canadian Entomologist , Volume 122 , Issue 1 , February 1990 , pp. 59 - 68
Copyright
Copyright © Entomological Society of Canada 1990

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