Aphidophagous Predators in Iowa Soybean: A Community Comparison across Multiple Years and Sampling Methods

dc.contributor.author Dixon, Philip
dc.contributor.author Schmidt, Nicholas
dc.contributor.author O'Neal, Matthew
dc.contributor.author Dixon, Philip
dc.contributor.author O'Neal, Matthew
dc.contributor.department Entomology
dc.date 2018-02-13T13:10:49.000
dc.date.accessioned 2020-06-30T02:21:59Z
dc.date.available 2020-06-30T02:21:59Z
dc.date.copyright Tue Jan 01 00:00:00 UTC 2008
dc.date.embargo 2013-07-26
dc.date.issued 2008-03-01
dc.description.abstract <p>There is increasing evidence that <em>Aphis glycines</em> Matsumara (Hemiptera: Aphididae) populations are negatively impacted by endemic natural enemies within North America. In Iowa, surveys of natural enemies in soybean, <em>Glycine max</em> (L.) Merr., conducted before the arrival of <em>A. glycines</em> revealed a number of species that may contribute to their mortality. We used several sampling methods to determine the diversity of the natural enemy community in Iowa soybean since the arrival of <em>A. glycines</em>. Natural enemies were collected using field-counts (in situ sampling), destructive counts, sweep-net sampling, and yellow-sticky cards. When predaceous arthropods were combined across all sampling methods, six orders were identified, including nine families and 13 genera. In comparison with a similar study conducted 26 yr ago, we observed fewer native coccinellids with the most abundant being the exotics <em>Harmonia axyridis</em> (Pallas) and <em>Coccinella septempunctata</em> L. (Coleoptera: Coccinellidae). Combining all foliar-based sampling methods reveals a community of four aphidophagous taxa that account for >94% of the total captured: <em>Toxomerus</em> spp., <em>H. axyridis</em>, <em>Orius insidiosus</em> (Say), and <em>Chrysoperla</em> spp. In both years, destructive counts collected fewer species with more found using field-counts, sweep-net, and yellow-sticky cards. Sweep-net and yellow-sticky cards collected more agile life-stages and species as expected from sampling methods that rely on the insects’ activity/density to be effective. Our data suggest absolute methods such as destructive and field-counts may underestimate the contribution of mobile predators on<em>A. glycines</em> mortality.</p>
dc.description.comments <p>This article is from <em>Annals of the Entomological Society of America</em> 101(2):341-350. 2008, doi: <a href="http://dx.doi.org/10.1603/0013-8746(2008)101[341:APIISA]2.0.CO;2">10.1603/0013-8746(2008)101[341:APIISA]2.0.CO;2</a></p>
dc.format.mimetype pdf
dc.identifier archive/lib.dr.iastate.edu/ent_pubs/15/
dc.identifier.articleid 1012
dc.identifier.contextkey 4352549
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath ent_pubs/15
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/23752
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/ent_pubs/15/2008_ONeal_PredatorsIowaSoybean_18.pdf|||Fri Jan 14 20:30:15 UTC 2022
dc.source.uri 10.1603/0013-8746(2008)101[341:APIISA]2.0.CO;2
dc.subject.disciplines Agriculture
dc.subject.disciplines Entomology
dc.subject.keywords soybean aphid
dc.subject.keywords invasive species
dc.subject.keywords predators
dc.title Aphidophagous Predators in Iowa Soybean: A Community Comparison across Multiple Years and Sampling Methods
dc.type article
dc.type.genre article
dspace.entity.type Publication
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relation.isAuthorOfPublication cdca6b0a-65c4-45dc-a6e4-4f0f1035f453
relation.isOrgUnitOfPublication f47c8cad-50be-4fb0-8870-902ff536748c
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