Using Microscopy to Assess Chorion Structural Integrity and Parasitoid Oviposition Sites on Stink Bug (Hemiptera: Pentatomidae) Eggs

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dc.contributor.authorKoppel, Amanda Leighen
dc.contributor.authorHerbert, D. Ames Jr.en
dc.contributor.authorWestbrook, E. W.en
dc.contributor.departmentEntomologyen
dc.contributor.departmentVirginia Agricultural Experiment Stationen
dc.date.accessed2014-07-15en
dc.date.accessioned2014-07-21T15:49:40Zen
dc.date.available2014-07-21T15:49:40Zen
dc.date.issued2011-02en
dc.description.abstractPrevious efficacy studies found that many insecticides used by growers could be having an adverse effect on egg parasitoids (Telenomus podisi) developing in the eggs of the brown stink bug (Euschistus servus), while unhatched stink bugs experienced lower levels of mortality. One plausible explanation for this was that insecticides might enter parasitized eggs more readily via oviposition wounds. Parasitized E. servus eggs, as well as nonparasitized stink bug (Acrosternum hilare, E. servus, Murgantia histrionica, and Podisus macoliventris) eggs, were examined using electron microscopy. Egg response to perforation by a tungsten probe served as a control. Microscopy images depicted the chorion surface as characterized by a matrix of ridges and micropylar processes in a ring around the margin of the operculum. Observations of oviposition sites showed a "scab" formed where the ovipositor penetrated the chorion, and at sites penetrated by the probe. These formations appeared to be the result of fluids from inside the egg leaking out, drying, and hardening after oviposition or probe perforation, suggesting that the response was not due to substances secreted by the parasitoid. Further, no open wounds or holes were seen to increase the possibility of insecticides entering parasitized eggs.en
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dc.identifier.citationKoppel, A. L.; Herbert, D. A.; Westbrook, E. W., "Using Microscopy to Assess Chorion Structural Integrity and Parasitoid Oviposition Sites on Stink Bug (Hemiptera: Pentatomidae) Eggs," Microsc. Microanal. 17, 114-117, 2011. DOI: 10.1017/s1431927610093906en
dc.identifier.doihttps://doi.org/10.1017/s1431927610093906en
dc.identifier.issn1431-9276en
dc.identifier.urihttp://hdl.handle.net/10919/49643en
dc.identifier.urlhttp://journals.cambridge.org/action/displayFulltext?type=1&fid=7978709&jid=MAM&volumeId=17&issueId=01&aid=7978707&bodyId=&membershipNumber=&societyETOCSession=en
dc.language.isoenen
dc.publisherCambridge University Pressen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectpentatomidaeen
dc.subjectegg chorion structureen
dc.subjectparasitoid ovipositionen
dc.subjectscanningen
dc.subjectelectron microscopyen
dc.subjectmaterials science, multidisciplinaryen
dc.subjectmicroscopyen
dc.titleUsing Microscopy to Assess Chorion Structural Integrity and Parasitoid Oviposition Sites on Stink Bug (Hemiptera: Pentatomidae) Eggsen
dc.title.serialMicroscopy and Microanalysisen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten

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