Reference : A semiochemical enhancing the attractiveness of aphidophagous predators in potato crops
Scientific congresses and symposiums : Poster
Life sciences : Entomology & pest control
http://hdl.handle.net/2268/93530
A semiochemical enhancing the attractiveness of aphidophagous predators in potato crops
English
Leroy, Pascal [Université de Liège - ULg > Sciences agronomiques > Entomologie fonctionnelle et évolutive >]
Vandereycken, Axel mailto [Université de Liège - ULg > Sciences agronomiques > Entomologie fonctionnelle et évolutive >]
Sabri, Ahmed mailto [Université de Liège - ULg > > Centre Wallon de biologie industrielle >]
Heuskin, Stéphanie mailto [Université de Liège - ULg > Chimie et bio-industries > Chimie analytique >]
Verheggen, François mailto [Université de Liège - ULg > Sciences agronomiques > Entomologie fonctionnelle et évolutive >]
Capella, Quentin [ > > ]
Farmakidis, Julien [Université de Liège - ULg > Sciences agronomiques > Entomologie fonctionnelle et évolutive >]
Thonart, Philippe mailto [Université de Liège - ULg > Département des sciences de la vie > Biochimie et microbiologie industrielles >]
Lognay, Georges mailto [Université de Liège - ULg > Chimie et bio-industries > Chimie analytique >]
Wathelet, Jean-Paul mailto [Université de Liège - ULg > Chimie et bio-industries > Chimie générale et organique >]
Brostaux, Yves mailto [Université de Liège - ULg > Sciences agronomiques > Statistique, Inform. et Mathém. appliquée à la bioingénierie >]
Haubruge, Eric mailto [Université de Liège - ULg > Services administratifs généraux > Vice-Recteur de Gembloux Agro Bio Tech >]
24-May-2011
A0
No
No
International
International Symposium on Crop Protection
24 mai 2011
Ghent
Belgique
[en] biological control ; aphids ; predators ; 3-Methyl-2-butenal ; attractant ; oviposition ; wind-tunnel ; potato crop
[en] Aphids are major pests of crops worldwide and the use of pesticides has led to resistant populations. The integration of aphid natural enemies in integrated management programs could be an option, but their efficacy is often limited by their quick dispersal from the ecosystem where they are released. Here, using wind-tunnel and field experiments, we have demonstrated that 3-Methyl-2-butenal acts as an efficient attractant and ovipositional stimulant for the hoverfly Episyrphus balteatus (De Geer) (Diptera: Syrphidae), enhancing its efficiency as biological control agent in crop fields. Wind-tunnel assays allowed determining that a minimal dose of 250 µg of 3-Methyl-2-butenal is required to attract the hoverflies over a distance of 2.5 m while a minimal dose of 500 µg is needed to induce the oviposition. Both attraction and oviposition increased proportionally to the tested doses showing that hoverflies are able to regulate their oviposition according to the chemical stimuli from their environment. In field experiments, both Syrphidae and Chrysopidae were strongly attracted by the 3-Methyl-2-butenal at a dose of 10 mg which also induces the oviposition of these two aphid predators in potato crops. This study also highlighted that hoverflies are the most abundant aphid predators found in natural environment. Against aphids, the use of this semiochemical could certainly enhance the efficiency of natural enemies. Furthermore, the use of the chemical cue 3-Methyl-2-butenal could provide a novel approach to control aphids in field and greenhouse systems.
Région wallonne
Solaphid
Researchers ; Professionals ; Students ; General public
http://hdl.handle.net/2268/93530

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