Regional pest suppression associated with adoption of <scp>Cry1Ac</scp> soybean benefits pest management in tropical agriculture

Horikoshi, Renato J.; Dourado, Patrick M.; Bernardi, Oderlei; Willse, Alan; Godoy, Wesley Augusto Conde; Omoto, Celso; Bueno, Adeney de Freitas; Martinelli, Samuel; Berger, G.; Head, Graham P.; Corrêa, Alberto Soares

doi:10.1002/ps.7034

Cited by 10 publications

(10 citation statements)

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“…Previous reports have stated that Cry1A.105/Cry2Ab2/Cry1Ac and Cry1Ac soybean technologies had reduced lethality against S. eridania and S. frugiperda [ 5 , 8 , 10 ]. This can be explained by the naturally low susceptibility of these species to Bt proteins [ 5 , 11 ]. According to Horikoshi et al [ 8 ], more than 98% of the insects sampled from the reproductive stages of Cry1Ac soybean in Brazil were Spodoptera , including S. cosmioides , S. eridania and S. frugiperda .…”

Section: Introductionmentioning

confidence: 99%

“…Specifically for S. frugiperda , the resistance to Bt proteins expressed in maize affects the performance of Bt soybean technologies [ 12 , 13 , 14 ]. Regardless of their relatively low lethality against Spodoptera species, these Bt soybean technologies suppressed infestations of primary lepidopteran species in soybean in Brazil, enabling a decrease in the use of chemical insecticides and enhancing the natural biological control of other species [ 11 , 15 ].…”

Section: Introductionmentioning

confidence: 99%

“…Sublethal effects can be defined as those caused by low residual doses, which can exert effects on biological, physiological and biochemical processes as well as on insect development and reproduction [ 16 , 17 , 18 ]. For example, the sublethal effects of the insecticides and the Bt proteins extended the larval development and reduced the larval biomass, adult fecundity and population growth of several Spodoptera species [ 5 , 10 , 11 , 12 , 13 , 14 , 19 , 20 , 21 ]. Therefore, elucidating the overall effects (i.e., both lethal and sublethal) of Bt proteins and insecticides on pest species is essential for the design of robust IPM programs.…”

Section: Introductionmentioning

confidence: 99%

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Dose Effects of Flubendiamide and Thiodicarb against Spodoptera Species Developing on Bt and Non-Bt Soybean

Godoy,

Pretto,

de Almeida

et al. 2023

Insects

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An increase in Spodoptera species was reported in Bt soybean fields expressing Cry1Ac insecticidal proteins in Brazil, requiring additional management with chemical insecticides. Here, we evaluated the dose effects of flubendiamide and thiodicarb on Spodoptera cosmioides (Walker, 1858), Spodoptera eridania (Stoll, 1782), Spodoptera albula (Walker, 1857) and Spodoptera frugiperda (J. E. Smith, 1797) (Lepidoptera: Noctuidae) that survived on MON 87751 × MON 87708 × MON 87701 × MON 89788, expressing Cry1A.105, Cry2Ab2 and Cry1Ac; MON 87701 × MON 89788 soybean, expressing Cry1Ac; and non-Bt soybean. On unsprayed Cry1A.105/Cry2Ab2/Cry1Ac soybean, only S. frugiperda showed ~60% mortality after 10 d, whereas S. cosmioides, S. eridania and S. albula showed >81% mortality. The surviving larvae of all species on this Bt soybean showed >80% mortality when exposed to the field label dose of flubendiamide (70 mL/ha) or thiodicarb (400 g/ha) or at 50% of these doses. In contrast, all four species had <25% and <19% mortality on Cry1Ac and non-Bt soybean, respectively. The surviving S. cosmioides, S. eridania and S. albula on these soybean types presented >83% mortality after exposure to both dose levels of flubendiamide and thiodicarb. Some S. frugiperda larvae surviving on Cry1Ac and non-Bt soybean sprayed with a 50% dose of either insecticide developed into adults. However, the L1 larvae developing on Cry1Ac soybean leaves sprayed with flubendiamide and the L2 larvae on this soybean sprayed with thiodicarb had a prolonged immature stage, and the females displayed lower fecundity, which are likely to impact S. frugiperda population growth on soybean.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Dose Effects of Flubendiamide and Thiodicarb against Spodoptera Species Developing on Bt and Non-Bt Soybean

Godoy,

Pretto,

de Almeida

et al. 2023

Insects

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“…Both Cry1Ac and Cry1A.105/Cry2Ab2/Cry1Ac soybean are effective against the primary lepidopteran pests that attack soybean in Brazil and other South American countries: Anticarsia gemmatalis (Hübner, 1818) (Lepidoptera: Erebidae), Chrysodeixis includens (Walker, [1858]), Chloridea virescens (Fabricius, 1781), and Helicoverpa armigera (Hübner, 1808) (Lepidoptera: Noctuidae). [3][4][5][6][7][8] However, the Cry1Ac soybean does not provide protection against Spodoptera species found in Brazil. 9 Species of genus Spodoptera are commonly observed in soybean fields in Brazil.…”

Section: Introductionmentioning

confidence: 99%

Characterizing the lethal and sub‐lethal effects of genetically modified soybean expressing Cry1A.105, Cry2Ab2, and Cry1Ac insecticidal proteins against Spodoptera species (Lepidoptera: Noctuidae) in Brazil

Barcellos

Hanich

Pretto

et al. 2022

Pest Management Science

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BACKGROUND MON 87701 × MON 89788 × MON 87751 × MON 87708 soybean, that expresses Cry1A.105, Cry2Ab2, and Cry1Ac insecticidal proteins and confers tolerance to glyphosate and dicamba, is a potential tool for managing Spodoptera species in soybean fields in Brazil. In this study, we characterized the lethal and sub‐lethal effects of Cry1A.105/Cry2Ab2/Cry1Ac soybean against Spodoptera species and genotypes of Spodoptera frugiperda resistant and susceptible to Cry1 and Cry2 proteins. These evaluations were also conducted with MON 87701 × MON 89788 soybean, which expresses Cry1Ac protein. RESULTS Cry1A.105/Cry2Ab2/Cry1Ac soybean caused high lethality in neonates of Spodoptera cosmioides and Spodoptera albula. However, it showed low lethality in S. frugiperda genotypes homozygous for resistance to Cry1 and Cry2 proteins but reduced their population growth potential. No relevant lethal effects of Cry1Ac soybean were detected in the Spodoptera species and genotypes evaluated. Spodoptera frugiperda genotypes heterozygous for Cry1 and Cry2 resistance were controlled by Cry1A.105/Cry2Ab2/Cry1Ac soybean, with no insects developing into adults. This Bt soybean also caused intermediate mortality of neonates of Spodoptera eridania (60%–83%) but no surviving larvae developed to adulthood, resulting in population suppression. CONCLUSIONS Cry1A.105/Cry2Ab2/Cry1Ac soybean caused high mortality of S. cosmioides, S. albula, and S. frugiperda genotypes susceptible to Cry1 and Cry2 and heterozygous for Cry1 and Cry2 resistance. This Bt soybean also suppressed population growth of S. eridania but had minimal impact on S. frugiperda homozygous for resistance to Cry1 and Cry2 proteins. Cry1Ac soybean had minimal impact on all Spodoptera species and genotypes evaluated. © 2022 Society of Chemical Industry.

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“…Os sistemas agrícolas de monocultivo trazem uma instabilidade à paisagem, alternando entre abundância de alimentos para uma escassez de recursos nas épocas de entressafra (DOURADO et al, 2021;HORIKOSHI et al, 2022). Nesse sentido, as subpopulações presentes na paisagem agrícola passariam por um processo de colonização e crescimento intensos, seguido de uma redução drástica na densidade populacional quando não há mais cultura no campo.…”

Section: Estrutura Genéticaunclassified

Identificação e filogeografia molecular de broca-das-axilas (Lepidoptera: Tortricidae) provenientes de cultivos de soja no Brasil

Fernandes¹

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Dedico A todos os pesquisadores temporários da ciência, comumente denominados de "estudantes de pós-graduação" que se submetem a fazer pesquisa e ciência com seriedade, apesar do salário tão baixo, sem perspectiva de aumento, sem participação de lucros, sem reconhecimento, sem direitos, sem férias, sem auxílio médico/odontológico, sem cesta-básica, sem auxílio transporte, sem aposentadoria, sem legislação que o auxilie, sem valorização de seu trabalho, sem o apoio da sociedade, e ainda por cima tão criticado nos últimos quatro anos. Dedico a todos esses trabalhadores que com devoção a causa se empenham para gerar conhecimento e avanço científico ao país, como bastidores da economia brasileira, sem os quais não haveria desenvolvimento tecnológico, não haveria agricultura de qualidade no ambiente tropical, e consequentemente, não teríamos um país com a importância agrícola que temos. AGRADECIMENTOS Ao Prof. Dr. Alberto Soares Corrêa pela sua orientação, por proporcionar esse projeto, por me ensinar e me guiar durante meu mestrado, por abrir as portas de seu laboratório e me motivar a fazer ciência. Agradeço por sua amizade, companheirismo e profissionalismo no ambiente de trabalho, e por ser um profissional que enxerga a saúde e o bem-estar de seus estudantes, Agradeço aos profissionais da Bayer, Renato Horikoshi e Patrick Dourado que providenciaram as coletas e auxiliaram na elaboração desse projeto, estendendo os valores da empresa para a sociedade. Agradeço aos funcionários da entomologia, em especial Luiz Maluta, que me auxiliou muito nos incontáveis documentos exigidos durante o mestrado,

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Regional pest suppression associated with adoption of Cry1Ac soybean benefits pest management in tropical agriculture

Cited by 10 publications

References 33 publications

Dose Effects of Flubendiamide and Thiodicarb against Spodoptera Species Developing on Bt and Non-Bt Soybean

Dose Effects of Flubendiamide and Thiodicarb against Spodoptera Species Developing on Bt and Non-Bt Soybean

Characterizing the lethal and sub‐lethal effects of genetically modified soybean expressing Cry1A.105, Cry2Ab2, and Cry1Ac insecticidal proteins against Spodoptera species (Lepidoptera: Noctuidae) in Brazil

Identificação e filogeografia molecular de broca-das-axilas (Lepidoptera: Tortricidae) provenientes de cultivos de soja no Brasil

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