Side-effects of synthetic pyrethroid insecticides on the dispersal activity of predatory coleoptera : with particular reference to the carabidae
Side-effects of synthetic pyrethroid insecticides on the dispersal activity of predatory coleoptera : with particular reference to the carabidae
The principle aims of the research presented here were to examine sub-lethal changes in beetle movement brought about by the application of synthetic pyrethroid insecticides. First the theoretical basis behind the experimental technique of pitfall trapping was examined through the use of computer simulation. This explored the validity of using pitfall traps for assessing the relative abundance of Coleoptera in circumstances where the activity of the populations under study may have changed. Following from this work, field investigation of carabid dispersal rate was undertaken using a novel form of trap, designed to efficiently recapture populations of epigeal invertebrates dispersing from within the area encompassed by the trap. The comparative estimates of dispersal rate obtained from this work highlighted trends in the response of carabids to field application of pyrethroid insecticides that were dependent upon the concentration of insecticide applied.
Video-tape recording techniques were used to quantify changes in individual beetle behaviour, under controlled laboratory conditions, after a single topical application of insecticide. A theoretical exploration and review of the literature on the distribution and movement patterns of Carabidae was carried out. The experimental findings to date were placed within the framework of local population persistence and population dynamics and the general problem of predicting carabid movement within and between habitats was considered. A large field study, described in chapter 6, was undertaken to examine the role which landscape features play in the distribution of coleopteran populations following insecticide spraying of cereal crops and whether observed changes could be accounted for by changes in the movement patterns of the relevant species.
University of Southampton
1994
Heneghan, Philip Andrew
(1994)
Side-effects of synthetic pyrethroid insecticides on the dispersal activity of predatory coleoptera : with particular reference to the carabidae.
University of Southampton, Doctoral Thesis.
Record type:
Thesis
(Doctoral)
Abstract
The principle aims of the research presented here were to examine sub-lethal changes in beetle movement brought about by the application of synthetic pyrethroid insecticides. First the theoretical basis behind the experimental technique of pitfall trapping was examined through the use of computer simulation. This explored the validity of using pitfall traps for assessing the relative abundance of Coleoptera in circumstances where the activity of the populations under study may have changed. Following from this work, field investigation of carabid dispersal rate was undertaken using a novel form of trap, designed to efficiently recapture populations of epigeal invertebrates dispersing from within the area encompassed by the trap. The comparative estimates of dispersal rate obtained from this work highlighted trends in the response of carabids to field application of pyrethroid insecticides that were dependent upon the concentration of insecticide applied.
Video-tape recording techniques were used to quantify changes in individual beetle behaviour, under controlled laboratory conditions, after a single topical application of insecticide. A theoretical exploration and review of the literature on the distribution and movement patterns of Carabidae was carried out. The experimental findings to date were placed within the framework of local population persistence and population dynamics and the general problem of predicting carabid movement within and between habitats was considered. A large field study, described in chapter 6, was undertaken to examine the role which landscape features play in the distribution of coleopteran populations following insecticide spraying of cereal crops and whether observed changes could be accounted for by changes in the movement patterns of the relevant species.
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Published date: 1994
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Local EPrints ID: 458460
URI: http://eprints.soton.ac.uk/id/eprint/458460
PURE UUID: f43d17c9-4e27-4ddc-bfe9-0c69427b5486
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Date deposited: 04 Jul 2022 16:49
Last modified: 04 Jul 2022 16:49
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Author:
Philip Andrew Heneghan
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