BioControl (2010) 55, 729-740

Mohannad Ismail, Philippe Vernon, Thierry Hance and Joan van Baaren (2010)
Physiological costs of cold exposure on the parasitoid Aphidius ervi, without selection pressure and under constant or fluctuating temperatures
BioControl 55 (6), 729-740
Abstract: The aim of this study is to evaluate the physiological costs and the consequences on fitness of cold exposure on the parasitoid Aphidius ervi (Hymenoptera: Aphidiinae) under non-lethal conditions. We exposed 1-day-old mummies to different treatments: control at 20°C, 7°C constant, 7°C fluctuating (7°C for 22 h and 20°C for 2 h). Two performances of fitness were particularly affected after two weeks at 7°C constant: female longevity and the sex ratio of the progeny was male biased. In contrast, egg load at emergence, lifetime fecundity, frequency of asymmetric individuals in both sexes, and mating success were not significantly affected under all treatments. The effects of these treatments on trends such as utilisation of fat reserves and fertility of males and females are discussed.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Thierry Hance, Joan van Baaren

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
environment/habitat manipulation

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
Aphidius ervi (parasitoid)