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Single and Combined Effects of Pesticide Seed Dressings and Herbicides on Earthworms, Soil Microorganisms, and Litter Decomposition

Van Hoesel, Willem ; Tiefenbacher, Alexandra ; König, Nina ; Dorn, Verena M. ; Hagenguth, Julia F. ; Prah, Urša ; Widhalm, Theresia LU ; Wiklicky, Viktoria ; Koller, Robert and Bonkowski, Michael , et al. (2017) In Frontiers in Plant Science 8.
Abstract
Seed dressing, i.e., the treatment of crop seeds with insecticides and/or fungicides, aiming to protect seeds from pests and diseases, is widely used in conventional agriculture. During the growing season, those crop fields often receive additional broadband herbicide applications. However, despite this broad utilization, very little is known on potential side effects or interactions between these different pesticide classes on soil organisms. In a greenhouse pot experiment, we studied single and interactive effects of seed dressing of winter wheat (Triticum aestivum L. var. Capo) with neonicotinoid insecticides and/or strobilurin and triazolinthione fungicides and an additional one-time application of a glyphosate-based... (More)
Seed dressing, i.e., the treatment of crop seeds with insecticides and/or fungicides, aiming to protect seeds from pests and diseases, is widely used in conventional agriculture. During the growing season, those crop fields often receive additional broadband herbicide applications. However, despite this broad utilization, very little is known on potential side effects or interactions between these different pesticide classes on soil organisms. In a greenhouse pot experiment, we studied single and interactive effects of seed dressing of winter wheat (Triticum aestivum L. var. Capo) with neonicotinoid insecticides and/or strobilurin and triazolinthione fungicides and an additional one-time application of a glyphosate-based herbicide on the activity of earthworms, soil microorganisms, litter decomposition, and crop growth. To further address food-web interactions, earthworms were introduced to half of the experimental units as an additional experimental factor. Seed dressings significantly reduced the surface activity of earthworms with no difference whether insecticides or fungicides were used. Moreover, seed dressing effects on earthworm activity were intensified by herbicides (significant herbicide × seed dressing interaction). Neither seed dressings nor herbicide application affected litter decomposition, soil basal respiration, microbial biomass, or specific respiration. Seed dressing did also not affect wheat growth. We conclude that interactive effects on soil biota and processes of different pesticide classes should receive more attention in ecotoxicological research. (Less)
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publishing date
type
Contribution to journal
publication status
published
keywords
agrochemicals, agroecology, neonicotinoids, non-target effects, pesticide, seed coatings, soil organisms, glyphosate-herbicide
in
Frontiers in Plant Science
volume
8
article number
215
pages
12 pages
publisher
Frontiers Media S. A.
ISSN
1664-462X
DOI
10.3389/fpls.2017.00215
language
English
LU publication?
no
id
13bb6232-cc94-4ad6-be8f-268d982a8baa
date added to LUP
2020-09-10 13:18:44
date last changed
2020-12-11 04:19:17
@article{13bb6232-cc94-4ad6-be8f-268d982a8baa,
  abstract     = {Seed dressing, i.e., the treatment of crop seeds with insecticides and/or fungicides, aiming to protect seeds from pests and diseases, is widely used in conventional agriculture. During the growing season, those crop fields often receive additional broadband herbicide applications. However, despite this broad utilization, very little is known on potential side effects or interactions between these different pesticide classes on soil organisms. In a greenhouse pot experiment, we studied single and interactive effects of seed dressing of winter wheat (<i>Triticum aestivum</i> L.<i> var. Capo</i>) with neonicotinoid insecticides and/or strobilurin and triazolinthione fungicides and an additional one-time application of a glyphosate-based herbicide on the activity of earthworms, soil microorganisms, litter decomposition, and crop growth. To further address food-web interactions, earthworms were introduced to half of the experimental units as an additional experimental factor. Seed dressings significantly reduced the surface activity of earthworms with no difference whether insecticides or fungicides were used. Moreover, seed dressing effects on earthworm activity were intensified by herbicides (significant herbicide × seed dressing interaction). Neither seed dressings nor herbicide application affected litter decomposition, soil basal respiration, microbial biomass, or specific respiration. Seed dressing did also not affect wheat growth. We conclude that interactive effects on soil biota and processes of different pesticide classes should receive more attention in ecotoxicological research.},
  author       = {Van Hoesel, Willem and Tiefenbacher, Alexandra and König, Nina and Dorn, Verena M. and Hagenguth, Julia F. and Prah, Urša and Widhalm, Theresia and Wiklicky, Viktoria and Koller, Robert and Bonkowski, Michael and Lagerlöf, Jan and Ratzenböck, Andreas and Zaller, Johann G.},
  issn         = {1664-462X},
  language     = {eng},
  publisher    = {Frontiers Media S. A.},
  series       = {Frontiers in Plant Science},
  title        = {Single and Combined Effects of Pesticide Seed Dressings and Herbicides on Earthworms, Soil Microorganisms, and Litter Decomposition},
  url          = {http://dx.doi.org/10.3389/fpls.2017.00215},
  doi          = {10.3389/fpls.2017.00215},
  volume       = {8},
  year         = {2017},
}