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Porträtt av Henrik Smith. Foto.

Henrik Smith

Professor

Porträtt av Henrik Smith. Foto.

Agricultural management reduces emergence of pollen beetle parasitoids

Författare

  • Helena Hanson
  • Henrik Smith
  • Katarina Hedlund

Summary, in English

Natural enemies such as predatory arthropods and parasitoids have the potential to suppress pest species and provide the ecosystem service biological control. When predicting the potential of biological control in agriculture it is important to give evidence on how agricultural management influence the abundance and functions of the natural enemies. In this study we examined whether managements practices as insecticide application and different tillage regimes, can influence biological control of a herbivorous pest on oilseed rape (Brassica napus L.). The endoparasitoids Phradis interstitialis Thomson and Tersilochus heterocerus Thomson were studied as they are important for the biological control of the pollen beetle (Meligethes aeneus F.) which is a common pest on oilseed rape in Europe. The number of emerging female parasitoids was quantified by capturing the parasitoids in emergence tents from fields where the oilseed rape plants were grown the previous year. The number of emerging P. interstitialis and T. heterocerus were significantly reduced in insecticide treated fields, but the tillage regimes had no effect on the number of emerging females of either parasitoid species. We conclude that when predicting the biological control potential by pollen beetle parasitoids in agricultural landscapes it is important to consider insecticide treatment of former oilseed rape fields as that can influence population densities at the landscape scale the following year. (C) 2015 Elsevier B.V. All rights reserved.

Avdelning/ar

  • Biodiversity
  • Centrum för miljö- och klimatvetenskap (CEC)
  • BECC: Biodiversity and Ecosystem services in a Changing Climate
  • Biodiversitet och bevarandevetenskap

Publiceringsår

2015

Språk

Engelska

Sidor

9-14

Publikation/Tidskrift/Serie

Agriculture, Ecosystems & Environment

Volym

205

Dokumenttyp

Artikel i tidskrift

Förlag

Elsevier

Ämne

  • Environmental Sciences related to Agriculture and Land-use

Nyckelord

  • Biological control
  • Emergence tents
  • Natural pest control
  • Oilseed rape
  • Pest
  • Pesticides
  • Tillage

Status

Published

Forskningsgrupp

  • Biodiversity and Conservation Science

ISBN/ISSN/Övrigt

  • ISSN: 1873-2305