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Agricultural management reduces emergence of pollen beetle parasitoids

Author:
  • Helena Hanson
  • Henrik Smith
  • Katarina Hedlund
Publishing year: 2015
Language: English
Pages: 9-14
Publication/Series: Agriculture, Ecosystems & Environment
Volume: 205
Document type: Journal article
Publisher: Elsevier

Abstract 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.

Keywords

  • Environmental Sciences related to Agriculture and Land-use
  • Biological control
  • Emergence tents
  • Natural pest control
  • Oilseed rape
  • Pest
  • Pesticides
  • Tillage

Other

Published
  • ISSN: 1873-2305
Katarina Hedlund
E-mail: katarina.hedlund [at] biol.lu.se

Professor

Biodiversity

+46 46 222 37 98

+46 72 562 10 04

E-A321

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Researcher

Centre for Environmental and Climate Research (CEC)

+46 46 222 37 98

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Centre for Animal Movement Research
Evolutionary Ecology, Department of Biology
Ecology building S-223 62 Lund Sweden