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Effects of temperature on the development and fecundity of Diaperasticus erythrocephala Olivier (Dermaptera: Forficulidae)

Published online by Cambridge University Press:  19 September 2011

Régine Aroga*
Affiliation:
Institut de Recherche Agricole pour le Développement, B. P. 2067, Yaoundé, Cameroun
Daniel Coderre
Affiliation:
Université du Québec à Montréal, Département des Sciences Biologiques, C. P. 8888 Suce. Centre-ville, Montréal Canada H3C 3P8
*
Corresponding author: RA. E-mail: aroga.ubs@iccnet.cm
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Abstract

The developmental, oviposition, and mortality rates for the polyphagous earwig Diaperasticus eryihrocephala Olivier feeding on pollen and Ephestia kuehniella Zeller eggs were measured at constant temperatures of 18, 25 and 32 °C. The developmental period for D. erythrocephala required 533 degree-days (DD) above a threshold of 6.7 °C. Egg and larval development rates increased with increasing temperature, with the shortest developmental period being recorded at 32 °C. However, egg and larval mortality and larval malformation rates were significantly higher at 32 than at 25 and 18 °C. Over a period of 60 days, females laid an average of 26.5 eggs at 25 °C and none at 18 °C. Based on the results obtained, it is concluded that of the three temperatures, 25 °C is the most suitable for the laboratory mass rearing of D. erythrocephala.

Résumé

Les taux-de développement, d'oviposition et de mortalité de Diaperasticus eryrthrocephala Olivier nourris avec du pollen et des œufs d'Ephestia kuehniella Zeller ont été mesurés aux températures constantes de 18, 25 et 32 °C. La période de développement requiert 533 degrés-jours (DD) au dessus d'une température seuil de développement de 6.7 °C. Les taux de développement embryonnaires et larvaires augmentent avec la température, avec une plus courte période de développement à 32 °C. Cependant, les taux de mortalité embryonnaires et larvaires et de malformations larvaires sont significativement plus élevés à 32 °C qu'à 25 et 18 °C. Sur une période de 60 jours, les femelles pondent en moyenne 26.5 œufs à 25 °C et aucun à 18 °C. Sur la base des résultats obtenus, il est conclu que parmi les trois températures, 25 °C est la plus favorable pour la production de masse au laboratoire de D. eryrthrocephala.

Type
Research Articles
Copyright
Copyright © ICIPE 2001

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