| Journal: | Scientia Agricola |
| Database: | PERIÓDICA |
| System number: | 000455448 |
| ISSN: | 0103-9016 |
| Authors: | Souza, Michael Willian Rocha de1 Soares, Marcus Alvarenga1 Serrão, José Eduardo2 Santos, Marinalva Martins dos1 Abreu, Caique Menezes de1 Costa, Márcia Regina da1 |
| Institutions: | 1Universidade Federal dos Vales do Jequitinhonha e Mucuri, Departamento de Agronomia, Diamantina, Minas Gerais. Brasil 2Universidade Federal de Vicosa, Departamento de Biologia Geral, Vicosa, Minas Gerais. Brasil |
| Year: | 2022 |
| Volumen: | 79 |
| Number: | 4 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Experimental, analítico |
| English abstract | An important concern with the use of genetically modified (GM) plants expressing Bacillus thuringiensis (Bt) insecticidal toxins is the deleterious effect on non–target organisms. The predatory stink bug Podisus nigrispinus (Dallas) (Hemiptera: Pentatomidae) is used in biological control programs and may be exposed to Bt toxins. This study evaluated the indirect effects of different Cry proteins on P. nigrispinus with the prey Spodoptera frugiperda (J.E. Smith, 1797) (Lepidoptera: Noctuidae), fed on simple or pyramided Bt maize genotypes. The experiment was carried out in a completely randomized design with three treatments: i) Isohybrid (not Bt), ii) Herculex® (transgenic maize encoding Cry1F protein) and iii) PowerCore® (pyramidal transgenic maize encoding the Cry1F, Cry1A.105, and Cry2Ab2 proteins), which were used to feed S. frugiperda for 48 h. The caterpillars were used as prey by P. nigrispinus females. We evaluated the presence of Cry proteins, consumed prey biomass (predation), oviposition period, number of postures, number of eggs, number of eggs per posture, number of nymphs, egg viability, embryonic period, female longevity and development, and survival rates of immature. The results show that different Cry proteins move through the food chain of P. nigrispinus and provide evidence that the ingestion of three different proteins does not lead to unexpected synergistic effects. However, Cry toxins promoted histopathological changes in midgut cells of P. nigrispinus |
| Disciplines: | Agrociencias, Biología |
| Keyword: | Fitopatología, Insectos, Gramíneas, Bacillus thuringiensis, Control biológico, Spodoptera frugiperda, Maíz transgénico |
| Keyword: | Phytopathology, Insects, Gramineae, Transgenic corn, Bacillus thuringiensis, Biological control, Spodoptera frugiperda |
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