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dc.contributor.authorSILVA, A. F. T.
dc.contributor.authorSILVA, L. B.
dc.contributor.authorMALAQUIAS, J. B.
dc.contributor.authorSALUSTINO, A. S.
dc.contributor.authorCORREIA NETO, D. F.
dc.contributor.authorPACHECO, D. M.
dc.contributor.authorFRAGOSO, D. B.
dc.contributor.authorPEREIRA, E. J. G.
dc.contributor.authora
dc.date.accessioned2024-02-27T11:32:40Z-
dc.date.available2024-02-27T11:32:40Z-
dc.date.created2024-02-27
dc.date.issued2024
dc.identifier.citationAgronomy, v. 14, n. 3, p. 451, 2024.
dc.identifier.issn2073-4395
dc.identifier.urihttp://www.alice.cnptia.embrapa.br/alice/handle/doc/1162293-
dc.descriptionFall armyworm (FAW, Spodoptera frugiperda) is a polyphagous and migratory lepidopteran pest insect in field crops and is notoriously invasive worldwide. In large portions of the Americas, its populations are managed using transgenic maize or cotton varieties producing insecticidal proteins from Bacillus thuringiensis (Bt), primarily Vip3Aa pyramided with Cry Bt proteins. We determined the susceptibility of FAW field populations from locations pressured with such maize hybrids for over five years. We used time–mortality bioassays with F1 third-instar larvae of six geographically distinct populations collected in maize fields of a tropical agricultural region encompassing four Brazilian states. We maintained the neonate progeny from the field populations on an artificial diet until the third instar, and then determined their survival curves on the foliage of three Vip3Aa/Cry-producing Bt maize hybrids. Death of the mid-size, third-instar FAWs occurred relatively rapidly, with larval mortality rates reaching 98–100% in less than five days regardless of Bt maize hybrid. However, median survival time (ST50) for the larvae differed among the populations, with the lowest and highest ST50 values occurring for PI-Cr (42 h, 1.75 d) and PI-Ur populations (66–90 h, 2.75–3.75 h), respectively. Therefore, the F1 third-instar larvae of FAW populations were largely susceptible to Vip3Aa/Cry-producing maize foliage, and the most contrasting susceptibility occurred in the insects from Piauí state, Brazil. These results indicate that progeny of FAWs from areas highly pressured with Vip3Aa/Cry Bt maize hybrids are killed on maize foliage producing Vip3Aa and Cry Bt proteins despite field reports of increased leaf damage by the larvae in some locations. This research informs decision making for Bt-crop resistance management by producers, technicians, and researchers in local, regional, and world agriculture.
dc.language.isoeng
dc.rightsopenAccess
dc.subjectBt crops
dc.titleSusceptibility of fall armyworm field populations to Vip3Aa/Cry Bt maize in a tropical agricultural region.
dc.typeArtigo de periódico
dc.subject.thesagroSpodoptera Frugiperda
dc.subject.thesagroBacillus Thuringiensis
dc.subject.thesagroLagarta
dc.subject.thesagroPraga de Planta
dc.subject.nalthesaurusTransgenic insects
dc.subject.nalthesaurusResistance management
dc.subject.nalthesaurusInsect pests
dc.subject.nalthesaurusTropical agriculture
riaa.ainfo.id1162293
riaa.ainfo.lastupdate2024-02-27
dc.identifier.doihttps://doi.org/10.3390/agronomy14030451
dc.contributor.institutionALISSON FRANCO TORRES DA SILVA, UNIVERSIDADE FEDERAL DO PIAUÍ; LUCIANA BARBOZA SILVA, UNIVERSIDADE FEDERAL DO PIAUÍ; JOSE B. MALAQUIAS, UNIVERSIDADE FEDERAL DA PARAÍBA; ANGELICA S. SALUSTINO, UNIVERSIDADE FEDERAL DA PARAÍBA; DOMINGOS FRANCISCO CORREIA NETO, UNIVERSIDADE FEDERAL DA PARAÍBA; DANIEL MARQUES PACHECO, UNIVERSIDADE FEDERAL DO PIAUÍ; DANIEL DE BRITO FRAGOSO, CNPASA; ELISEU J. G. PEREIRA, UNIVERSIDADE FEDERAL DE VIÇOSA.
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