Seasonal parasitism of cereal aphids in a Mediterranean arable crop system |
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Authors: | Belén Lumbierres Petr Starý Xavier Pons |
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Institution: | (1) Universitat de Lleida, Centre UdL-IRTA, Rovira Roure 191, 25198 Lleida, Spain;(2) Academy of Sciences of the Czech Republic, Institute of Entomology, Branisovská 31, 37005 České Budějovice, Czech Republic |
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Abstract: | We monitored winter cereal fields in a Mediterranean arable crop system to obtain information about the aphid parasitoid species
composition and the aphid–parasitoid interactions through the whole cropping cycle. Nine species of aphid primary parasitoids
(Hymenoptera, Braconidae, Aphidiinae) were identified. The most abundant species were Aphidius rhopalosiphi, Aphidius matricariae, Aphidius ervi and Lysiphlebus testaceipes. The genus Aphelinus sp. (Hym., Aphelinidae) was also identified. We determined seasonal host–parasitoid associations over the entire cereal crop
cycle. A number of new such associations were recorded, which were previously unknown in Spain and Europe. Our results indicated
broad associations of L. testaceipes and A. matricariae with cereal aphids; furthermore, the association of Aphelinus sp. with several cereal aphid species was also substantial. In the NE of the Iberian Peninsula, the cereal aphid parasitoids
that we identified are able to develop throughout the crop season on one or more host species. Thus, the main aphid species
can be parasitized effectively throughout the entire cereal crop cycle. We discuss the role of cereal aphid parasitoids in
the region in the context of our experimental results. |
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Keywords: | Aphelinidae Aphididae Aphidiinae Braconidae Cereal aphid parasitoids Winter cereals |
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