Poster (Scientific congresses and symposiums)
Species diversity and abundance of aphids and their natural enemies in a crop association
Chevalier Mendes Lopes, Thomas; Hatt, Séverin; Starý, Petr et al.
2015UK – French joint meeting on Aphids
 

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Keywords :
crop association; wheat; pea; aphids; natural enemies; species diversity; association de cultures; blé; pois; pucerons; ennemis naturels; diversité d'espèces
Abstract :
[en] Crop associations can be efficient to reduce aphid populations, by disrupting the visual and olfactory location of host plants. However, increasing the chemical and structural complexity of vegetation can also decrease the searching efficiency of predators and parasitoids, which are not always more abundant in complex habitats. Using attractive semiochemicals such as methyl salicylate (MeSA) combined with a crop association seems promising to maximise aphid control. We compared the abundances of aphids and their natural enemies between a wheat-pea mixture (with and without MeSA) and pure stands, using yellow traps and observations on plants. Significantly higher numbers of pea aphids (Acyrthosiphon pisum) were observed in the pure stand of pea compared with the mixture (with and without MeSA) in 2013 and 2014. Concerning aphid natural enemies, hoverfly larvae abundance was not significantly different between treatments in both years. Parasitoid mummies were significantly more abundant in the pure stand of pea compared with the mixture (with and without MeSA) in 2014. Fifty-two aphid species were collected in yellow traps, as well as 12 Aphidiinae and four Aphelinus species. Acyrthosiphon primulae, Aphelinus daucicola, Aphelinus fusciscapus, Aphidius asteris, Aphidius eadyi, Metopolophium frisicum, Praon barbatum, and Trioxys auctus were recorded for the first time in Belgium. Besides determining the effects of a wheat-pea mixture (with or without MeSA) on aphid control, this study contributed to increase the knowledge on aphid and their parasitoid diversity in Belgium, by recording new species and establishing the first Aphidiinae and Aphelinus national checklist.
Disciplines :
Entomology & pest control
Author, co-author :
Chevalier Mendes Lopes, Thomas ;  Université de Liège > Agronomie, Bio-ingénierie et Chimie (AgroBioChem) > Entomologie fonctionnelle et évolutive
Hatt, Séverin ;  Université de Liège > Agronomie, Bio-ingénierie et Chimie (AgroBioChem) > Entomologie fonctionnelle et évolutive
Starý, Petr
Japoshvili, George
Francis, Frédéric  ;  Université de Liège > Agronomie, Bio-ingénierie et Chimie (AgroBioChem) > Entomologie fonctionnelle et évolutive
Language :
English
Title :
Species diversity and abundance of aphids and their natural enemies in a crop association
Alternative titles :
[fr] Diversité et abondance de pucerons et de leurs ennemis naturels dans une association de cultures
Publication date :
November 2015
Event name :
UK – French joint meeting on Aphids
Event organizer :
Biologie Adaptative des Pucerons et Organismes Associés
Aphids Special Interest Group Royal Entomological Society
Event place :
Paris, France
Event date :
du 5 au 6 Novembre 2015
Audience :
International
Funders :
FRIA - Fonds pour la Formation à la Recherche dans l'Industrie et dans l'Agriculture [BE]
Available on ORBi :
since 17 December 2015

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