Assessing the Effects of Pest Management on Nontarget Arthropods: The Influence of Plot Size and Isolation

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dc.contributor.author Prasifka, Jarrad
dc.contributor.author Hellmich, Richard
dc.contributor.author Hellmich, Richard
dc.contributor.author Dively, Galen
dc.contributor.author Lewis, Leslie
dc.contributor.department Entomology
dc.date 2018-02-14T11:07:44.000
dc.date.accessioned 2020-06-30T02:25:37Z
dc.date.available 2020-06-30T02:25:37Z
dc.date.embargo 2014-08-26
dc.date.issued 2005-01-01
dc.description.abstract <p>Evaluations of field research on the nontarget effects of pest management, particularly the production of transgenic crops with insecticidal properties, suggest the methods used are sometimes unlikely to detect real differences among treatments. Among potential problems, abundance estimates may be scale-dependent for many arthropods, which move among experimental plots and between experimental plots and the surrounding environment. Insecticide-disturbed plots of field corn in a range of sizes in 2003 (0.03–0.53 ha; 18–72 m wide) and 2004 (0.01–0.13 ha; 9–36 m wide) were used for testing effects of scale on nontarget arthropod abundance. Possible effects of artificially isolating plots by removal of vegetation around plot borders were also studied in 2003. Community and taxon-based analyses showed abundance of foliar (aboveground) arthropods depended on plot size and isolation. While abundance of foliar arthropods was generally greater in smaller plots, isolation treatments suggested some taxa may have been either repelled or attracted to isolated plots. Levels of some epigeal (ground-dwelling) taxa were also size or isolation-dependent, but community-based analysis did not indicate a strong collective response to treatments. Recommendation of a practical but rigorous minimum plot size for nontarget studies may not be appropriate because responses to plot size varied among taxa. However, because arthropod movement into and out of plots can reduce differences between treatments, results suggest the use of small plots (width <9 >m) for nontarget studies on transgenic crops generally should be avoided. Similarly, the taxon-specific effects of isolating plots should be considered when planning studies or interpreting results.</p>
dc.description.comments <p>This article is from <em>Environmental Entomology</em>; 34 (2005); 1181-1192; doi: <a href="http://dx.doi.org/10.1603/0046-225X(2005)034[1181:ATEOPM]2.0.CO;2" target="_blank">10.1603/0046-225X(2005)034[1181:ATEOPM]2.0.CO;2</a></p>
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dc.identifier archive/lib.dr.iastate.edu/ent_pubs/96/
dc.identifier.articleid 1095
dc.identifier.contextkey 6039707
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath ent_pubs/96
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/24256
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/ent_pubs/96/2005_HellmichRL_AssessingEffectsPest.pdf|||Sat Jan 15 02:35:07 UTC 2022
dc.source.uri 10.1603/0046-225X(2005)034[1181:ATEOPM]2.0.CO;2
dc.subject.disciplines Entomology
dc.subject.keywords experimental design
dc.subject.keywords spatial scale
dc.subject.keywords isolation
dc.subject.keywords Bacillus thuringiensis (Berliner)
dc.subject.keywords principal response curves
dc.title Assessing the Effects of Pest Management on Nontarget Arthropods: The Influence of Plot Size and Isolation
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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