Poster (Scientific congresses and symposiums)
Flexible aggregative behavior of Harmonia axyridis according to the freshness of area marking in overwintering sites
Durieux, Delphine; Fischer, Christophe; Fassotte, Bérénice et al.
201228th International Society of Chemical Ecology Annual Meeting
 

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Abstract :
[en] The multicolored Asian ladybeetle, Harmonia axyridis (Pallas) (Coleoptera: Coccinellidae), aggregates inside dwellings and buildings during winter to survive cold. This adaptive behavior causes annoyances to the occupants because of their large number and the induction of allergic reactions. Although this species has aroused a great interest these last years, the factors involved in the selection of its overwintering sites remain misunderstood. The work presented herein was oriented to the study of the non-volatile chemical compounds involved in this aggregation behavior. Chemical analyses revealed the occurrence, in aggregation sites, of an area marking made up of saturated and unsaturated hydrocarbons. Behavioral investigations demonstrated that H. axyridis preferentially aggregates in sites previously marked by congeners, indicating the retention potential of this blend on overwintering individuals. In the second instance, the same analyses were performed on an area marking aged of one year. The chemical investigations showed that only saturated hydrocarbons can still be detected after that period of time but the remaining blend does not induce aggregation anymore. This difference of response according to the freshness of the area marking suggests that this species would not be prisoner of the marking previously deposited on the substrate if the surrounding has changed and the site is not suitable anymore.
Disciplines :
Entomology & pest control
Author, co-author :
Durieux, Delphine ;  Université de Liège - ULiège > Sciences agronomiques > Entomologie fonctionnelle et évolutive
Fischer, Christophe ;  Université de Liège - ULiège > Chimie et bio-industries > Analyse, qual. et risques - Labo. de Chimie analytique
Fassotte, Bérénice ;  Université de Liège - ULiège > Sciences agronomiques > Entomologie fonctionnelle et évolutive
Brostaux, Yves  ;  Université de Liège - ULiège > Sciences agronomiques > Statistique, Inform. et Mathém. appliquée à la bioingénierie
Lognay, Georges ;  Université de Liège - ULiège > Chimie et bio-industries > Analyse, qual. et risques - Labo. de Chimie analytique
Haubruge, Eric  ;  Université de Liège - ULiège > Services administratifs généraux > Vice-Recteur de Gembloux Agro Bio Tech
Verheggen, François  ;  Université de Liège - ULiège > Sciences agronomiques > Entomologie fonctionnelle et évolutive
Language :
English
Title :
Flexible aggregative behavior of Harmonia axyridis according to the freshness of area marking in overwintering sites
Publication date :
July 2012
Event name :
28th International Society of Chemical Ecology Annual Meeting
Event place :
Vilnius, Lithuania
Event date :
du 22 au 26 juillet 2012
Audience :
International
Funders :
FRIA - Fonds pour la Formation à la Recherche dans l'Industrie et dans l'Agriculture [BE]
Available on ORBi :
since 08 August 2012

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