Behavioural consequences of cold exposure on males and females of <Emphasis Type="Italic">Aphidius rhopalosiphi</Emphasis> De Stephani Perez (Hymenoptera: Braconidae) |
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Authors: | Delphine Bourdais Philippe Vernon Liliane Krespi Joan van Baaren |
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Institution: | 1.UMR 6553 CNRS, EcoBio,Université de Rennes I, Equipe Impact des Changements Climatiques,Paimpont,France;2.UMR 6553 CNRS, EcoBio,Université de Rennes I, Equipe Impact des Changements Climatiques,Rennes cedex,France;3.Biodiversity Research Center, Earth and Life Institute,Université Catholique de Louvain,Louvain-la-Neuve,Belgium;4.Equipe d’Ecobiologie des Insectes Parasito?des,Université de Rennes I,Rennes cedex,France |
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Abstract: | Cold storage of insect parasitoids is currently used before mass release in the field in biological control programmes. The
physiological consequences of constant cold storage are known in various species of parasitic wasps, but there are few reports
on the behaviour of survivors and even fewer reports where both sexes were tested. In this study, we observed the consequences
of a long storage of Aphidius rhopalosiphi De Stephani Perez (Hymenoptera: Braconidae), a parasitoid of the cereal aphid Sitobion avenae Fabricius (Hemiptera: Aphididae), at low temperature on some key behavioural decisions that both sexes will make when released
in the field. Males are less tolerant than females and both sexes suffer from a long exposure (28 days or more) at 4°C during
the pupal stage: alteration of olfactory responses, decrease in mating capacity and decrease in the efficiency of patch exploitation
by females. |
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Keywords: | |
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