ORBi: Leroy Pascal - Microorganisms from aphids attract hoverflies and enhance their efficacy

Reference : Microorganisms from aphids attract hoverflies and enhance their efficacy


	Document type :	Scientific congresses and symposiums : Poster
	Discipline(s) :	Life sciences : Entomology & pest control
	To cite this reference:	http://hdl.handle.net/2268/93528

Title :	Microorganisms from aphids attract hoverflies and enhance their efficacy
Language :	English
Author, co-author :	Leroy, Pascal [Université de Liège - ULg > Sciences agronomiques > Entomologie fonctionnelle et évolutive >]
	Sabri, Ahmed [Université de Liège - ULg > > Centre Wallon de biologie industrielle >]
	Heuskin, Stéphanie [Université de Liège - ULg > Chimie et bio-industries > Chimie analytique >]
	Thonart, Philippe [Université de Liège - ULg > Département des sciences de la vie > Biochimie et microbiologie industrielles >]
	Lognay, Georges [Université de Liège - ULg > Chimie et bio-industries > Chimie analytique >]
	Verheggen, François [Université de Liège - ULg > Sciences agronomiques > Entomologie fonctionnelle et évolutive >]
	Brostaux, Yves [Université de Liège - ULg > Sciences agronomiques > Statistique, Inform. et Mathém. appliquée à la bioingénierie >]
	Felton, Gary [University of Pennsylvania - Penn > Entomology > > >]
	Haubruge, Eric [Université de Liège - ULg > Services administratifs généraux > Vice-Recteur de Gembloux Agro Bio Tech >]
Publication date :	5-Mar-2011
Page number :	A0
Peer reviewed :	No
On invitation :	No
Audience :	International
Event name :	Global Conference on Entomology GCE Thailand 2011
Event date :	du 5 mars 2011 au 9 mars 2011
Event place (city) :	Chiang Mai
Event country :	Thaïlande
Keywords :	[en] Biological control ; Aphids ; Hoverfly ; Episyrphus balteatus ; Honeydew ; Bacteria ; Kairomone ; Semiochemicals ; Attractants ; Ovipositional stimulants ; Wind-tunnel experiments ; Field crops ; Greenhouse systems
Abstract :	[en] Aphids are some of the most serious pests of crops worldwide, causing major yield and economic losses. They damage plants by feeding on the phloem sap, excreting copious amounts of honeydew and, in some cases, vectoring plant diseases. Here, we report the first isolation of a bacterium from the pea aphid Acyrthosiphon pisum honeydew, Staphylococcus sciuri, which is involved in the release of semiochemicals acting as a kairomone for aphid natural enemies. These semiochemicals were identified by Solid-Phase Microextraction (SPME) and Gas Chromatography-Mass Spectrometry (GC-MS). Our results show that this bacterium plays a key role in the interactions between aphids and natural enemies because it is the direct source of volatiles used by the aphidophagous hoverfly Episyrphus balteatus (De Geer) (Diptera: Syrphidae) to locate its aphid prey. Through wind-tunnel experiments, some specific semiochemicals produced by S. sciuri were identified as significant attractants and ovipositional stimulants. Also, assays under greenhouses and in potato fields have demonstrated that a culture medium containing the bacterium S. sciuri strongly attracts and induces the oviposition of hoverflies, enhancing their efficiency as biological control agents. The use of this no pathogenic bacterium could provide a very novel approach towards enhancing the efficacy of biological control agents to control aphids in field crops and greenhouse systems.
Funders :	Région wallonne
Name of the research project :	Solaphid
Target :	Researchers ; Professionals ; Students ; General public
Permalink :	http://hdl.handle.net/2268/93528

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