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EFFETS DE LA PHOTOPERIODE ET DES TEMPERATURES MOYENNES DE 15 °C SUR LA FECONDITE ET LA PRODUCTION DES SEXUES CHEZ LE PUCERON DU POIS, ACYRTHOSIPHON PISUM (APHIDIDAE: HOMOPTERA)1

Published online by Cambridge University Press:  31 May 2012

M. L. Sharma ,
J. M. Larrivée  and
L. M. Thériault
M. L. Sharma
Affiliation:
Département de biologie, Université de Sherbrooke, Sherbrooke, Québec
J. M. Larrivée
Affiliation:
Département de biologie, Université de Sherbrooke, Sherbrooke, Québec
L. M. Thériault
Affiliation:
Département de biologie, Université de Sherbrooke, Sherbrooke, Québec
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Abstract

The fecundity of the pea aphid Acyrthosiphon pisum (Harris) at 15 °C gradually diminishes as we diminish the daily photoperiod, this being maximum at 16 hours of photoperiod (55 ± 10 on variety Lincoln and 74 ± 15 individuals per parent on pea variety Perfection).

At 15 °C sex determination seems to take place between 12 and 14 hours of photoperiod, the critical phase for the change of sex being 13 hours 17 minutes of photoperiod for A. pisum. Maximum male production (57 – 63%) takes place at a photoperiod between 13 hours 4 minutes and 13 hours 36 minutes. A maximum of 90.5% of oviparous females was produced at a photoperiod of 12 hours and 10 minutes.

Résumé

La fécondité du puceron du pois Acyrthosiphon pisum (Harris) diminue au fur et à mesure que l’on diminue la photopériode journalière, ceci étant maximal à 16 heures de photopériode (55 ± 10 sur la variété Lincoln et de 74 ± 15 sur la variété Perfection du pois) à 15 °C.

Le déterminisme des sexes semble s’effectuer entre les photopériodes de 12 heures et 14 heures, le seuil critique de changement de sexe étant situé à 13 heures et 17 minutes chez A. pisum. Maximum de mâles (57 à 63%) sont produits entre 13 heures 4 minutes et 13 heures 36 minutes. Un maximum de 90.5% de femelles ovipares a été produit à 12 heures 10 minutes de photopériode.

Type
Articles
Information
The Canadian Entomologist , Volume 105 , Issue 7 , July 1973 , pp. 947 - 956
Copyright
Copyright © Entomological Society of Canada 1973

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