Subacute Effects of Cry1Ab Bt Corn Litter on the Earthworm Eisenia fetida and the Springtail Folsomia candida

dc.contributor.author Clark, Bryan
dc.contributor.author Coats, Joel
dc.contributor.author Coats, Joel
dc.contributor.department Entomology
dc.contributor.department Toxicology
dc.date 2018-02-17T06:32:58.000
dc.date.accessioned 2020-06-30T02:23:19Z
dc.date.available 2020-06-30T02:23:19Z
dc.date.copyright Sun Jan 01 00:00:00 UTC 2006
dc.date.issued 2006-08-01
dc.description.abstract <p>Laboratory toxicity studies were conducted to determine the subacute effects of <em>Bt</em> Cry1Ab corn leaf material on nontarget soil organisms. Survival and growth were measured for an earthworm, <em>Eisenia fetida</em> Savigny, and survival and reproduction were measured for a springtail, <em>Folsomia candida</em> Willem. The organisms were provided leaf material of two Bt11 corn varieties, two Mon810 corn varieties, and the isolines of each, in a soil system and monitored for 28 d. An assay control treatment of an optimal food and a reference control treatment, using the herbicide pendimethalin, were used to provide a context for the observed results. Basic nutritional data of protein, fat, and sugar content were analyzed for each food type. Greater growth was observed for <em>E. fetida</em> in two <em>Bt</em> varieties, Bt11 90-d and Mon810 108-d, compared with their isolines. <em>F. candida</em> receiving Bt11 90-d isoline material had more offspring compared with those in the corresponding Bt line, but no other pairs were different. Time to reproduction of <em>F. candida</em> was only affected by the reference control treatment. Both protein and sugar content were found to correlate significantly with growth for <em>E. fetida</em>, but the nutritional parameters were not found to correlate with the effects observed for <em>F. candida</em>. These results indicate that there is little direct hazard from <em>Bt</em> corn leaf material to <em>E. fetida</em> and <em>F. candida</em> but that differences in nutritional parameters of the<em>Bt</em> lines and the isolines may lead to differences in the effects on nontarget organisms.</p>
dc.description.comments <p>This article is from<em> Environmental Entomology</em> 35 (2006): 112, doi:<a href="http://dx.doi.org/10.1603/0046-225X-35.4.1121" target="_blank">10.1603/0046-225X-35.4.1121</a>. Posted with permission.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/ent_pubs/319/
dc.identifier.articleid 1315
dc.identifier.contextkey 7872750
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath ent_pubs/319
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/23931
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/ent_pubs/319/2006_Coats_SubacuteEffects.pdf|||Fri Jan 14 23:32:56 UTC 2022
dc.source.uri 10.1603/0046-225X-35.4.1121
dc.subject.disciplines Entomology
dc.subject.disciplines Toxicology
dc.subject.keywords transgenic corn
dc.subject.keywords nontargets
dc.subject.keywords Folsomia candida
dc.subject.keywords Eisenia fetida
dc.title Subacute Effects of Cry1Ab Bt Corn Litter on the Earthworm Eisenia fetida and the Springtail Folsomia candida
dc.type article
dc.type.genre article
dspace.entity.type Publication
relation.isAuthorOfPublication 8bcdfc38-7da7-4e3c-8039-e495b01cc710
relation.isOrgUnitOfPublication f47c8cad-50be-4fb0-8870-902ff536748c
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