Sweet Corn Sentinel Monitoring for Lepidopteran Field-Evolved Resistance to Bt Toxins

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dc.contributor.authorDively, G. P.en
dc.contributor.authorKuhar, Thomas P.en
dc.contributor.authorTaylor, Sally V.en
dc.contributor.authorDoughty, H. B.en
dc.contributor.authorHolmstrom, K.en
dc.contributor.authorGilrein, D.en
dc.contributor.authorNault, B. A.en
dc.contributor.authorIngerson-Mahar, J.en
dc.contributor.authorWhalen, J.en
dc.contributor.authorReisig, D.en
dc.contributor.authorFrank, Daniel L.en
dc.contributor.authorFleischer, S. J.en
dc.contributor.authorOwens, Daviden
dc.contributor.authorWelty, C.en
dc.contributor.authorReay-Jones, F. P. F.en
dc.contributor.authorPorter, P.en
dc.contributor.authorSmith, J. L.en
dc.contributor.authorSaguez, J.en
dc.contributor.authorMurray, S.en
dc.contributor.authorWallingford, A.en
dc.contributor.authorByker, H.en
dc.contributor.authorJensen, B.en
dc.contributor.authorBurkness, E.en
dc.contributor.authorHutchison, W. D.en
dc.contributor.authorHamby, K. A.en
dc.date.accessioned2021-12-18T19:46:02Zen
dc.date.available2021-12-18T19:46:02Zen
dc.date.issued2021-02-01en
dc.date.updated2021-12-18T19:46:00Zen
dc.description.abstractAs part of an insect resistance management plan to preserve Bt transgenic technology, annual monitoring of target pests is mandated to detect susceptibility changes to Bt toxins. Currently Helicoverpa zea (Boddie) monitoring involves investigating unexpected injury in Bt crop fields and collecting larvae from non-Bt host plants for laboratory diet bioassays to determine mortality responses to diagnostic concentrations of Bt toxins. To date, this monitoring approach has not detected any significant change from the known range of baseline susceptibility to Bt toxins, yet practical field-evolved resistance in H. zea populations and numerous occurrences of unexpected injury occur in Bt crops. In this study, we implemented a network of 73 sentinel sweet corn trials, spanning 16 U.S. states and 4 Canadian provinces, for monitoring changes in H. zea susceptibility to Cry and Vip3A toxins by measuring differences in ear damage and larval infestations between isogenic pairs of non-Bt and Bt hybrids over three years. This approach can monitor susceptibility changes and regional differences in other ear-feeding lepidopteran pests. Temporal changes in the field efficacy of each toxin were evidenced by comparing our current results with earlier published studies, including baseline data for each Bt trait when first commercialized. Changes in amount of ear damage showed significant increases in H. zea resistance to Cry toxins and possibly lower susceptibility to Vip3a. Our findings demonstrate that the sentinel plot approach as an in-field screen can effectively monitor phenotypic resistance and document field-evolved resistance in target pest populations, improving resistance monitoring for Bt crops.en
dc.description.versionAccepted versionen
dc.format.extentPages 307-319en
dc.format.extent13 page(s)en
dc.format.mimetypeapplication/pdfen
dc.identifier.doihttps://doi.org/10.1093/jee/toaa264en
dc.identifier.eissn1938-291Xen
dc.identifier.issn0022-0493en
dc.identifier.issue1en
dc.identifier.orcidKuhar, Thomas [0000-0002-2076-1494]en
dc.identifier.orcidTaylor, Sally [0000-0003-2970-0687]en
dc.identifier.other6020107 (PII)en
dc.identifier.pmid33274391en
dc.identifier.urihttp://hdl.handle.net/10919/107120en
dc.identifier.volume114en
dc.language.isoenen
dc.publisherOxford University Pressen
dc.relation.urihttp://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000648959000034&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=930d57c9ac61a043676db62af60056c1en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectLife Sciences & Biomedicineen
dc.subjectEntomologyen
dc.subjectBt toxinen
dc.subjectinsect resistance monitoringen
dc.subjectsentinel sweet cornen
dc.subjectHELICOVERPA-ZEA LEPIDOPTERAen
dc.subjectBACILLUS-THURINGIENSISen
dc.subjectINSECT RESISTANCEen
dc.subjectSPODOPTERA-FRUGIPERDAen
dc.subjectEARWORM LEPIDOPTERAen
dc.subjectTRANSGENIC CROPSen
dc.subjectFALL ARMYWORMen
dc.subjectNOCTUIDAEen
dc.subjectMAIZEen
dc.subjectSUSCEPTIBILITYen
dc.subjectEntomologyen
dc.subject0501 Ecological Applicationsen
dc.subject0608 Zoologyen
dc.subject0703 Crop and Pasture Productionen
dc.subject.meshAnimalsen
dc.subject.meshMothsen
dc.subject.meshBacillus thuringiensisen
dc.subject.meshPlants, Genetically Modifieden
dc.subject.meshZea maysen
dc.subject.meshBacterial Proteinsen
dc.subject.meshEndotoxinsen
dc.subject.meshPest Control, Biologicalen
dc.subject.meshInsecticide Resistanceen
dc.subject.meshCanadaen
dc.subject.meshHemolysin Proteinsen
dc.subject.meshBacillus thuringiensis Toxinsen
dc.titleSweet Corn Sentinel Monitoring for Lepidopteran Field-Evolved Resistance to Bt Toxinsen
dc.title.serialJournal of Economic Entomologyen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten
dc.type.otherArticleen
dc.type.otherJournalen
pubs.organisational-group/Virginia Techen
pubs.organisational-group/Virginia Tech/Agriculture & Life Sciencesen
pubs.organisational-group/Virginia Tech/Agriculture & Life Sciences/Entomologyen
pubs.organisational-group/Virginia Tech/Agriculture & Life Sciences/Tidewater ARECen
pubs.organisational-group/Virginia Tech/All T&R Facultyen
pubs.organisational-group/Virginia Tech/Agriculture & Life Sciences/CALS T&R Facultyen

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