Relationship between the abundance of aphids and their natural enemies in crop fields and landscape composition. - INRAE - Institut national de recherche pour l’agriculture, l’alimentation et l’environnement Access content directly
Journal Articles European Journal of Environmental Sciences Year : 2012

Relationship between the abundance of aphids and their natural enemies in crop fields and landscape composition.

Abstract

We investigated, over the course of two years, the importance of landscape context on the abundance of aphids and their natural carabid enemies, which may help to develop effective strategies for reduction of aphid outbreaks in agricultural landscapes. This was undertaken in 12 wheat fields and in 12 maize fields each year in an agricultural landscape in western France. Our study area was characterized by hedgerows surrounding arable ?elds and permanent grasslands. Some areas did not change much over a few decades, while ?eld enlargement and removal of hedges appeared in some places following agricultural intensi?cation,. The present paper aimed at examining if the landscape context around crop fields affected the abundance of aphids (either directly, or indirectly via their natural enemies) and if this effect depends on the landscape scale considered. We observed that the abundance of aphids in the field was associated with landscape composition at large scale (500 m and 800 m). There was a positive correlation between the abundance of the aphids and the proportion of woodland and grassland at these scales. There was a negative correlation between the abundance of carabids and the proportion of grassland and hedgerow around crop fields. The species richness of carabids was positively correlated with the proportion of hedgerows . We found that the proportion of grassy strips affect negatively the abundance of aphids in the wheat fields, and positively so in maize fields. Carabid abundance was positively correlated with the proportion of grassy strips at large scale in both types of cultures.
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Dates and versions

hal-00924673 , version 1 (07-01-2014)

Identifiers

  • HAL Id : hal-00924673 , version 1
  • PRODINRA : 314816

Cite

Diab Al Hassan, N. Parisey, Françoise Burel, Manuel Plantegenest, Pavel Kindlmann, et al.. Relationship between the abundance of aphids and their natural enemies in crop fields and landscape composition.. European Journal of Environmental Sciences, 2012, 2 (2), pp.89-99. ⟨hal-00924673⟩
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