Biodiversité et aménagements fonctionnels en verger de pommiers : Implication des prédateurs généralistes vertébrés et invertébrés dans le contrôle des ravageurs.

Abstract : Generalist predators have been merely studied in conservation biological control studies in apple orchards. This work aimed to determine the potential of invertebrate (arthropods, mainly carabids and spiders) and vertebrate (great tits and bats) predators at suppressing three key apple pests and then to devise which landscape features are beneficial to them. For this purpose, we monitored pest and predator populations in organic apple orchards of southeastern France and related their abundance and diversity to measures of pest predation using molecular gut content and faeces analysis with specific primers designed for this purpose. We found that pests were consumed as soon as they arrived in the orchard, in particular aphid by canopy spiders, indicating that these predators are likely to be efficient. We also observed some temporal complementarity in predation of tortricids by spiders and carabids. Finally, the influence of landscape features within and surrounding the orchards was different for the different studied taxa suggesting the need for compromises in orchard management for enhancing natural enemy populations and for a better consideration of the ecology of these predators.
Document type :
Theses
Complete list of metadatas

https://pastel.archives-ouvertes.fr/pastel-00952799
Contributor : Abes Star <>
Submitted on : Thursday, February 27, 2014 - 3:07:12 PM
Last modification on : Monday, June 26, 2017 - 9:52:52 AM
Long-term archiving on : Tuesday, May 27, 2014 - 11:50:11 AM

File

DLE_26887_BOREAU.pdf
Version validated by the jury (STAR)

Identifiers

  • HAL Id : pastel-00952799, version 1

Collections

Citation

Catherine Boreau de Roincé. Biodiversité et aménagements fonctionnels en verger de pommiers : Implication des prédateurs généralistes vertébrés et invertébrés dans le contrôle des ravageurs.. Sciences agricoles. AgroParisTech, 2012. Français. ⟨NNT : 2012AGPT0009⟩. ⟨pastel-00952799⟩

Share

Metrics

Record views

1180

Files downloads

4305