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EFFET DU RAYONNEMENT LUMINEUX ET DE LA VITESSE DE L’AIR AMBIANT SUR LA TEMPÉRATURE CORPORELLE DES LARVES ET DES ADULTES DU DORYPHORE DE LA POMME DE TERRE

Published online by Cambridge University Press:  31 May 2012

Yvan Pelletier  and
Gilles Bélanger
Yvan Pelletier*
Affiliation:
Centre de recherches Agriculture et Agroalimentaire Canada, B. P. 20 280, Fredericton, NB E3B 427, Canada
Gilles Bélanger
Affiliation:
Centre de recherches Agriculture et Agroalimentaire Canada, B. P. 20 280, Fredericton, NB E3B 427, Canada
*
1Auteur correspondant (tél. : (506) 452-3206; téléc. : (506) 452-3316; counier électronique : [email protected]).
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Abstract

The effect of light intensity and wind speed on the body temperature of larvae and adults of the Colorado potato beetle (Leptinotarsa decemlineata (Say)) was studied in the laboratory. At a light intensity of 0.95 kW m−2 and without wind, the body temperature of larvae and adults was respectively 9.3 and 18.2 °C higher than air temperature. The temperature difference between the body temperature of larvae and adults and the air temperature increased linearly with an increase in light intensity. Wind speed had an important effect on the rate of increase of the body temperature as a function of light intensity in both larvae and adults. Our results demonstrated that the energy balance of larvae and adults differs.

Résumé

L’effet de l’intensité du rayonnement lumineux et de la vitesse de l’air ambiant sur l’accroissement de température corporelle de la larve et de l’adulte du doryphore de la pomme de terre (Leptinotarsa decemlineata (Say)) a été évalué en laboratoire. La température corporelle des larves et des adultes était respectivement de 9,3 et 18,2 °C plus élevée que la température de l’air, sous des conditions sans vent et à un niveau de rayonnement lumineux de 0,95 kW m−2. La différence entre la température corporelle des adultes et des larves et celle de l’air augmentait linéairement avec une augmentation de l’intensité lumineuse. La vitesse de l’air ambiant avait un effet important sur le taux d’accroissement de la température corporelle en fonction de l’intensité lumineuse chez les deux stades du doryphore de la pomme de terre. Les résultats obtenus démontrent que les échanges énergétiques des larves et des adultes diffèrent sous plusieurs aspects.

Type
Articles
Information
The Canadian Entomologist , Volume 129 , Issue 5 , October 1997 , pp. 801 - 808
Copyright
Copyright © Entomological Society of Canada 1997

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