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Natural enemies associated with the cabbage whitefly Aleyrodes proletella in Germany

  • Sebastian Laurenz
  • Stefan Schmidt
  • Birgit Balkenhol
  • Rainer Meyhöfer
Original Article
  • 27 Downloads

Abstract

Aleyrodes proletella Linnaeus (Hemiptera: Aleyrodidae) causes severe economic damage on cabbage crops especially in organic vegetable production. Cabbage producers lack efficient and sustainable control measures against this major pest. Knowledge on the regional diversity of its natural enemies is required for the development of biological and integrated strategies to regulate A. proletella populations. Therefore, a 3-year survey of the natural enemies of A. proletella was conducted at five locations across Germany. For this purpose, parasitoids and predators were sampled from organic Brussels sprouts fields that were highly infested with A. proletella. Encarsia tricolor Förster (Hymenoptera: Aphelinidae) was the dominant parasitoid species and comprised 99.5% of all parasitoids encountered. Other parasitoids were Encarsia inaron Walker (Hymenoptera: Aphelinidae) and Euderomphale chelidonii Erdös (Hymenoptera: Eulophidae). Most sampled predators were hoverfly larvae (49.6%) followed by spiders (33.8%), ladybeetles (14.2%), predatory bugs (1.6%) and lacewing larvae (0.8%). Harmonia (Coleoptera: Coccinellidae), Sphaerophoria, Episyrphus (Diptera: Syrphidae) and Tetragnatha (Araneae: Tetragnathidae) were the most abundant genera of predators. The only whitefly specialist among the predators was Clitostethus arcuatus Rossi (Coleoptera: Coccinellidae). A detailed list of identified natural enemies is provided, and their relevance in naturally regulating A. proletella populations discussed and possible implementations in pest management strategies are proposed.

Keywords

Aleyrodidae Biological control Functional biodiversity Parasitoids Predators 

Notes

Acknowledgements

We thank the plant protection advisors for their support in finding appropriate Brussels sprouts fields. Special thanks go to the Vegetable Research and Information Center (GKZ) of the State Institute for Agriculture and Fisheries Mecklenburg-West Pomerania and all the vegetable farmers who participated in our survey and allowed us to sample natural enemies. The project was supported by funds of the Federal Ministry of Food and Agriculture (BMEL) based on a decision of the Parliament of the Federal Republic of Germany via the Federal Office for Agriculture and Food (BLE) under the innovation support programme.

Compliance with ethical standards

Conflict of interest

The authors have no conflict of interest and confirm that there are no disputes over the ownership of the data presented and all contributions have been attributed appropriately.

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Copyright information

© Deutsche Phytomedizinische Gesellschaft 2018

Authors and Affiliations

  1. 1.Section Phytomedicine, Institute of Horticultural Production SystemsLeibniz Universität HannoverHannoverGermany
  2. 2.SNSB-Zoologische Staatssammlung München (ZSM)MunichGermany
  3. 3.State Museum of Natural History GörlitzGörlitzGermany
  4. 4.Department of Crop Sciences, Agricultural EntomologyGeorg-August-Universität GöttingenGöttingenGermany

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