Effects of insecticide exposure on movement and population size estimates of predatory ground beetles (Coleoptera: Carabidae)

dc.contributor.author Prasifka, Jarrad
dc.contributor.author Hellmich, Richard
dc.contributor.author Lopez, Miriam
dc.contributor.author Hellmich, Richard
dc.contributor.author Prasifka, Patricia
dc.contributor.department Entomology
dc.date 2018-02-14T11:09:31.000
dc.date.accessioned 2020-06-30T02:21:40Z
dc.date.available 2020-06-30T02:21:40Z
dc.date.embargo 2014-08-27
dc.date.issued 2008-01-01
dc.description.abstract <p><strong>BACKGROUND:</strong> Estimates of arthropod population size may paradoxically increase following insecticide applications. Research with ground beetles (Coleoptera: Carabidae) suggests that such unusual results reflect increased arthropod movement and capture in traps rather than real changes in population size. However, it is unclear whether direct (hyperactivity) or indirect (prey-mediated) mechanisms produce increased movement.</p> <p><strong>RESULTS:</strong> Video tracking of <em>Scarites quadriceps</em> Chaudior indicated that brief exposure to lambda-cyhalothrin or tefluthrin increased total distance moved, maximum velocity and percentage of time moving. Repeated measurements on individual beetles indicated that movement decreased 240 min after initial lambda-cyhalothrin exposure, but increased again following a second exposure, suggesting hyperactivity could lead to increased trap captures in the field. Two field experiments in which ground beetles were collected after lambda-cyhalothrin or permethrin application attempted to detect increases in population size estimates as a result of hyperactivity. Field trials used mark–release–recapture methods in small plots and natural carabid populations in larger plots, but found no significant short-term (<6 day) increases in beetle trap captures.</p> <p><strong>CONCLUSION:</strong> The disagreement between laboratory and field results suggests mechanisms other than hyperactivity may better explain unusual changes in population size estimates. When traps are used as a primary sampling tool, unexpected population-level effects should be interpreted carefully or with additional data less influenced by arthropod activity</p>
dc.description.comments <p>This article is from <em>Pest Management Science</em>; 64 (2008); 30-36; doi: <a href="http://dx.doi.org/10.1002/ps.1460" target="_blank">10.1002/ps.1460</a></p>
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dc.identifier archive/lib.dr.iastate.edu/ent_pubs/110/
dc.identifier.articleid 1111
dc.identifier.contextkey 6044135
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath ent_pubs/110
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/23711
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/ent_pubs/110/2008_HellmichRL_EffectsInsecticideExposure.pdf|||Fri Jan 14 18:39:51 UTC 2022
dc.source.uri 10.1002/ps.1460
dc.subject.disciplines Entomology
dc.subject.keywords sublethal
dc.subject.keywords activity-density
dc.subject.keywords pitfall traps
dc.subject.keywords pyrethroids
dc.subject.keywords EthoVision
dc.subject.keywords hormesis
dc.title Effects of insecticide exposure on movement and population size estimates of predatory ground beetles (Coleoptera: Carabidae)
dc.type article
dc.type.genre article
dspace.entity.type Publication
relation.isAuthorOfPublication 3cca44d8-e1df-437d-a95a-d8e38963d2c1
relation.isOrgUnitOfPublication f47c8cad-50be-4fb0-8870-902ff536748c
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