Predatory arthropods in apple orchards across Europe: Responses to agricultural management, adjacent habitat, landscape composition and country

Research output: Contribution to journalArticle

Abstract

Local agri-environmental schemes, including hedgerows, flowering strips, organic management, and a landscape rich in semi-natural habitat patches, are assumed to enhance the presence of beneficial arthropods and their contribution to biological control in fruit crops. We studied the influence of local factors (orchard management and adjacent habitats) and of landscape composition on the abundance and community composition of predatory arthropods in apple orchards in three European countries. To elucidate how local and landscape factors influence natural enemy effectiveness in apple production systems, we calculated community energy use as a proxy for the communities’ predation potential based on biomass and metabolic rates of predatory arthropods. Predator communities were assessed by standardised beating samples taken from apple trees in 86 orchards in Germany, Spain and Sweden. Orchard management included integrated production (IP; i.e. the reduced and targeted application of synthetic agrochemicals), and organic management practices in all three countries. Predator communities differed between management types and countries. Several groups, including beetles (Coleoptera), predatory bugs (Heteroptera), flies (Diptera) and spiders (Araneae) benefited from organic management depending on country. Woody habitat and IP supported harvestmen (Opiliones). In both IP and organic orchards we detected aversive influences of a high-quality surrounding landscape on some predator groups: for example, high covers of woody habitat reduced earwig abundances in German orchards but enhanced their abundance in Sweden, and high natural plant species richness tended to reduce predatory bug abundance in Sweden and IP orchards in Spain. We conclude that predatory arthropod communities and influences of local and landscape factors are strongly shaped by orchard management, and that the influence of management differs between countries. Our results indicate that organic management improves the living conditions for effective predator communities.

Details

Authors
  • Anne Kathrin Happe
  • Georgina Alins
  • Nico Blüthgen
  • Virginie Boreux
  • Jordi Bosch
  • Daniel García
  • Peter A. Hambäck
  • Alexandra Maria Klein
  • Rodrigo Martínez-Sastre
  • Marcos Miñarro
  • Ann Kathrin Müller
  • Mario Porcel
  • Anselm Rodrigo
  • Laura Roquer-Beni
  • Ulrika Samnegård
  • Marco Tasin
  • Karsten Mody
Organisations
External organisations
  • Technical University of Darmstadt
  • Alfred-Wegener Institute for Polar and Marine Research, Potsdam
  • Institute of Agricultural-Alimentary Research and Technology (IRTA)
  • Albert-Ludwigs University Freiburg
  • University of Oviedo
  • Stockholm University
  • Swedish University of Agricultural Sciences
  • Autonomous University of Barcelona
  • Servicio Regional de Investigación y Desarrollo Agroalimentario (SERIDA)
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Environmental Sciences related to Agriculture and Land-use

Keywords

  • Agri-environmental scheme, Biological control, Integrated pest management, Natural enemy, Organic management, Woody habitat
Original languageEnglish
Pages (from-to)141-150
Number of pages10
JournalAgriculture, Ecosystems and Environment
Volume273
Publication statusPublished - 2019
Publication categoryResearch
Peer-reviewedYes