The spatial and temporal dynamics of pesticide side-effects on non-target invertebrates in UK cereal crops
The spatial and temporal dynamics of pesticide side-effects on non-target invertebrates in UK cereal crops
Studies of the recovery of three invertebrate families (Carabidae, Linyphiidae and Staphylinidae) following exposure to insecticides in large-scale field trials were carried out. The analyses indicated that the recovery of Carabidae was mediated via reinvasion from untreated control plots whilst the recovery of Linyphiidae and Staphylinidae was mediated by reinvasion from all surrounding untreated areas. A modelling approach was then used to investigate the mechanism of the recovery that was observed for the Carabidae. A statistical comparison of the output from two simulation models indicated that random movement from untreated, to treated, plots could account for the recovery patterns observed. The effects of the insecticide dimethoate on individual species of carabid was also investigated. A series of categories of effect was identified and an attempt was made to identify those species that were most at risk from pesticides using a novel ranking system. The routes of exposure of non-target invertebrates to pesticides was investigated in laboratory and field studies. The data indicated that residual exposure to pesticide may contribute significantly towards the mortality observed in the large-scale field experiments. Discussion of the data focused upon the importance of the effects of scale and experimental design in the interpretation of pesticide side-effects experiments. Suggestions were given for improvement of current pesticide side-effects assessments.
University of Southampton
Thacker, Jonathon Richard Macdougall
1991
Thacker, Jonathon Richard Macdougall
Thacker, Jonathon Richard Macdougall
(1991)
The spatial and temporal dynamics of pesticide side-effects on non-target invertebrates in UK cereal crops.
University of Southampton, Doctoral Thesis.
Record type:
Thesis
(Doctoral)
Abstract
Studies of the recovery of three invertebrate families (Carabidae, Linyphiidae and Staphylinidae) following exposure to insecticides in large-scale field trials were carried out. The analyses indicated that the recovery of Carabidae was mediated via reinvasion from untreated control plots whilst the recovery of Linyphiidae and Staphylinidae was mediated by reinvasion from all surrounding untreated areas. A modelling approach was then used to investigate the mechanism of the recovery that was observed for the Carabidae. A statistical comparison of the output from two simulation models indicated that random movement from untreated, to treated, plots could account for the recovery patterns observed. The effects of the insecticide dimethoate on individual species of carabid was also investigated. A series of categories of effect was identified and an attempt was made to identify those species that were most at risk from pesticides using a novel ranking system. The routes of exposure of non-target invertebrates to pesticides was investigated in laboratory and field studies. The data indicated that residual exposure to pesticide may contribute significantly towards the mortality observed in the large-scale field experiments. Discussion of the data focused upon the importance of the effects of scale and experimental design in the interpretation of pesticide side-effects experiments. Suggestions were given for improvement of current pesticide side-effects assessments.
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Published date: 1991
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Local EPrints ID: 462005
URI: http://eprints.soton.ac.uk/id/eprint/462005
PURE UUID: 07127388-cd46-4cfb-9aed-98e8740f5d4a
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Date deposited: 04 Jul 2022 18:59
Last modified: 04 Jul 2022 18:59
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Author:
Jonathon Richard Macdougall Thacker
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