[en] Aphids are some of the most serious pests of cultivated crops worldwide, causing major yield and economic losses. Previous works have demonstrated ants and natural enemies (including ladybeetles and hoverflies) to be able to use aphid volatile chemicals to locate aphid colonies. Here, we report the first isolation of a bacterium from the pea aphid Acyrthosiphon pisum honeydew, Staphylococcus sciuri, which produces kairomones used by the aphidophagous hoverfly Episyrphus balteatus and the Asian Ladybeetle Harmonia axyridis during their search for prey colonies. Some specific semiochemicals produced by S. sciuri were identified as attractants and ovipositional stimulants. Similarly, we have shown scouts of the aphid tending ant species, Lasius niger, to orientate their foraging behaviour toward an Aphis fabae infested plant and we have demonstrated that the odours released by this aphid honeydew were attractive for ant scouts. Again, bacteria were involved in the production of these honeydew semiochemicals. Interestingly, ant scouts were also able to discriminate honeydew odour from A. fabae (usually attended by L. niger) and A. pisum (unattendedby L. niger). Comparison of the volatile and bacteria composition of both aphid species honeydew were attended.
Disciplines :
Microbiology Agriculture & agronomy Entomology & pest control
Author, co-author :
Verheggen, François ; Université de Liège - ULiège > Sciences agronomiques > Entomologie fonctionnelle et évolutive
Leroy, Pascal
Fischer, Christophe ; Université de Liège - ULiège > Chimie et bio-industries > Analyse, qual. et risques - Labo. de Chimie analytique
Sabri, Ahmed ; Université de Liège - ULiège > Centre Wallon de biologie industrielle
Heuskin, Stéphanie ; Université de Liège - ULiège > Chimie et bio-industries > Analyse, qual. et risques - Labo. de Chimie analytique
Thonart, Philippe ; Université de Liège - ULiège > Département des sciences de la vie > Biochimie et microbiologie industrielles
Fleton, Gary
Detrain, Claire
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
Language :
English
Title :
Microorganisms from aphid honeydew attract natural enemies and tending ants
Publication date :
February 2012
Event name :
Gordon Research Conference on Plant Volatiles
Event organizer :
Jonathan Gershenzon
Event place :
Ventura, United States
Event date :
du 29 janvier au 2 février 2012
By request :
Yes
Audience :
International
Funders :
DGA - Région wallonne. Direction générale de l'Agriculture FRFC - Fonds de la Recherche Fondamentale Collective
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