Tracing individual movements of aphids reveals preferential routes of population transfers in agroecosystems. - Institut Agro Rennes-Angers Accéder directement au contenu
Article Dans Une Revue Ecological Applications Année : 2006

Tracing individual movements of aphids reveals preferential routes of population transfers in agroecosystems.

Résumé

Agricultural pests are not restricted to crops, but often simultaneously or successively use different cultivated and uncultivated hosts. Nevertheless, the source–sink role of cultivated and uncultivated habitats in the life cycle of crop pests remains poorly understood. This is largely due to the difficulty of tracking displacements of small organisms in agricultural landscapes. We used stable-isotope ratios in order to infer the natal host plant of individuals of the English grain aphid Sitobion avenae colonizing wheat fields in autumn. We showed that among the numerous plant sources of S. avenae, maize, which has been intensively grown in western France since the 1960s, provided most aphids that attack wheat fields early in autumn. This study illustrates how insect pests respond to land-use changes within a relatively short period of time, rapidly acquiring a new host that in turn affected their population biology considerably by playing a pivotal role on their annual life cycle.
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Dates et versions

hal-00086283 , version 1 (18-07-2006)

Identifiants

  • HAL Id : hal-00086283 , version 1
  • PRODINRA : 252444

Citer

Aude Vialatte, Jean-Christophe Simon, Charles-Antoine Dedryver, Frédéric Fabre, Manuel Plantegenest. Tracing individual movements of aphids reveals preferential routes of population transfers in agroecosystems.. Ecological Applications, 2006, 16(3), pp.839-844. ⟨hal-00086283⟩
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