Journal article

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Direct effects of insecticides on common ragweed-implications for natural enemy exclusion trials

  • Lommen, Suzanne T. E. Department of Biology, University of Fribourg, Switzerland
  • Fogliatto, Silvia Dipartimento di Scienze Agrarie, Forestali e Alimentari, Università di Torino, Grugliasco (TO), Italy
  • Vidotto, Francesco Dipartimento di Scienze Agrarie, Forestali e Alimentari, Università di Torino, Grugliasco (TO), Italy
  • Citterio, Sandra Dipartimento di Science Ambientali, Università di Milano-Bicocca, Milano, Italy
  • Augustinus, Benno Andreas Department of Biology, University of Fribourg, Switzerland - CABI Europe-Switzerland, Delémont, Switzerland
  • Müller-Schärer, Heinz Department of Biology, University of Fribourg, Switzerland
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    22.12.2017
Published in:
  • Journal of Pesticide Science. - 2018, vol. 43, no. 1, p. 36-40
English Experimentally applying pesticides is an important method to assess the efficacy of weed biocontrol agents, but potential direct effects of the chemicals on plant performance are controversial or unknown. We assessed how three broad-spectrum insecticides applied in combination affect the performance of the widely invasive, crop-yield reducing, allergenic common ragweed (Ambrosia artemisiifolia L.) in an insect-free environment. Spraying insecticides had no significant effects on aboveground dry weight, seed and pollen output or pollen allergenicity, and only explained 1–8% of variation in these parameters. Our insecticide treatment can hence be applied to assess biocontrol impact on biomass and reproductive output of common ragweed. As our insecticide treatment delayed senescence, however, other methods of insect exclusion should be preferred when studying common ragweed phenology.
Faculty
Faculté des sciences et de médecine
Department
Département de Biologie
Language
  • English
Classification
Biology
License
License undefined
Identifiers
Persistent URL
https://folia.unifr.ch/unifr/documents/306359
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