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Mutualisme pucerons-fourmis : étude des bénéfices retirés par les colonies d’Aphis fabae en milieu extérieur
Verheggen, François; Detrain, Claire; Diez, Lise et al.
2008Belgian Crongress of Zoology
 

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Keywords :
Aphid; Ant
Abstract :
[en] Aphid-Ant relationships are common examples of mutualism. Aphids are indeed submitted to predation and therefore require protection, while ants are continuously looking for new sugar sources. The present work aimed to study the benefits that a mutualistic relationship with Lasius niger (Hymenoptera : Formicidae) could bring to the black bean aphid Aphis fabae (Homoptera, Aphididae). Several parameters were observed in the field, on broad bean plants infested with an initial amount of 100 A. fabae and in presence or not of a L. niger colony. More aphids were observed on plants being visited by ants as well as a higher proportion of winged individuals. One explanation is that fewer predators were observed on plants being visited by ants, demonstrating their protective role. However, the number of parasitized aphids was not reduced in presence of L. niger. On the other hand, fewer different aphid species were present on plants foraged by ants, what suggests that they could exert a predation on unattended aphids. Our observations do not allow to conclude on any impact of L. niger on the fitness of the aphid host plant, although fewer exuvia and honeydew spots were observed when they were present. All these results confirm that L. niger increase the fitness of A. fabae colonies mainly by decreasing the number of predators and by reducing competition from aphid species unattended by ants.
Disciplines :
Entomology & pest control
Author, co-author :
Verheggen, François  ;  Université de Liège - ULiège > Gembloux Agro-Bio Tech > Gembloux Agro-Bio Tech
Detrain, Claire
Diez, Lise
Wathelet, Bernard ;  Université de Liège - ULiège > Gembloux Agro-Bio Tech > Gembloux Agro-Bio Tech
Haubruge, Eric  ;  Université de Liège - ULiège > Gembloux Agro-Bio Tech > Gembloux Agro-Bio Tech
Language :
English
Title :
Mutualisme pucerons-fourmis : étude des bénéfices retirés par les colonies d’Aphis fabae en milieu extérieur
Publication date :
2008
Event name :
Belgian Crongress of Zoology
Event place :
Liège, Belgium
Audience :
International
Available on ORBi :
since 15 December 2009

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