[en] The multicolored Asian ladybeetle, Harmonia axyridis (Pallas), exhibits a gregarious behavior during unfavorable winter conditions. Although this behavior is currently described as a phenomenon occurring only during winter, aggregations can also be observed outside overwintering conditions. However, the substrate markings previously highlighted as being involved in the wintry aggregation of this exotic species do not seem to be used by non-overwintering individuals to aggregate. This fact suggests then that other cues are responsible for the induction of this behavior. In this work, we have tested the hypothesis that direct contact between non-overwintering individuals stimulates the establishment of clusters. Binary choice experiments highlighted the involvement of elytral cuticular compounds in this phenomenon. Chromatographic analyses showed that the active extracts contained mainly hydrocarbons, including saturated, mono-unsaturated, and di-unsaturated homologues. Physical contact also seems to be involved in the non-overwintering aggregative behavior of H. axyridis, but to a lesser extent than these natural compounds. These findings could eventually be used to develop new control methods of these pest populations and so, reduce the adverse impacts it causes on biodiversity.
Disciplines :
Entomology & pest control
Author, co-author :
Durieux, Delphine ; Université de Liège - ULiège > Sciences agronomiques > Entomologie fonctionnelle et évolutive
Fassotte, Bérénice ; 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
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 :
Is Contact Between Conspecifics Involved in the Cohesion of Harmonia axyridis (Pallas) (Coleoptera: Coccinellidae) Aggregations?
Publication date :
June 2014
Journal title :
Journal of Insect Behavior
ISSN :
0892-7553
eISSN :
1572-8889
Publisher :
Springer Science & Business Media B.V.
Volume :
27
Issue :
1
Pages :
1-13
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
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