[en] The Asian ladybird, Harmonia axyridis Pallas (Coleoptera: Coccinellidae), has been introduced in Western Europe to control aphid and coccid populations in greenhouses. This exotic species rapidly adapted to temperate climatic conditions and invaded all Europe in few years. Now, H. axyridis is causing damages to the ecosystems through e.g. intraguild predation (IGP) with native species. We evaluated, in 2009 and 2010, the occurrence of aphid natural enemies (hoverflies, coccinellids and lacewings) in several agro-ecosystems (corn, wheat, potato, broad bean) in northern Wallonia (Belgium). Five dominating aphidophagous species were observed, in decreasing order of importance: Episyrphus balteatus (De Geer), Chrysoperla carnea sensus lato (Stephens), Coccinella septempunctata (Linné), Harmonia axyridis and Propylea quatuordecimpunctata (Linné). The Multicolored Asian ladybird represents 8,7% of all observed aphidophagous species and 23,9% of coccinellids. Moreover, H. axyridis occurrence is two-times less important than C. 7-punctata. These results highlight that this invasive species is currently not the most abundant in southern Belgium agro-ecosystems and would not influence other aphid predators in those particular ecosystems.
Disciplines :
Entomology & pest control
Author, co-author :
Vandereycken, Axel ; Université de Liège - ULiège > Sciences agronomiques > Entomologie fonctionnelle et évolutive
Durieux, Delphine ; Université de Liège - ULiège > Sciences agronomiques > Entomologie fonctionnelle et évolutive
Joie, Emilie ; Université de Liège - ULiège > Sciences agronomiques > Entomologie fonctionnelle et évolutive
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 :
French
Title :
La coccinelle asiatique est-elle l'aphidiphage dominant dans les agro-écosystèmes ?
Alternative titles :
[en] IS THE MULTICOLORED ASIAN LADYBIRD THE MOST ABUNDANT APHIDOPHAGOUS SPECIES IN AGRO-ECOSYSTEMS?
Publication date :
2011
Event name :
Neuvième Conférence Internationale sur les Ravageurs en Agriculture
Event organizer :
Association Française de Protection des Plantes
Event place :
Montpellier, France
Event date :
26 et 27 octobre
Audience :
International
Main work title :
9ème Conférence Internationale sur les Ravageurs en Agriculture, Montpellier 26-27 octobre 2011
Peer reviewed :
Peer reviewed
Name of the research project :
Évaluation de l’impact des invasions de coccinelles asiatiques sur l’agriculture wallonne et prise en considération au sein de programmes de lutte intégrée
Funders :
SPW DG03-DGARNE - Service Public de Wallonie. Direction Générale Opérationnelle Agriculture, Ressources naturelles et Environnement
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