Dissipation of fenitrothion and esfenvalerate in wheat grains, bran and flour
Chemical insecticides are commonly used to control insect pests in stored wheat. However, the presence of insecticide residues in food may endanger consumers. We studied the degradation and persistence of two insecticides, fenitrothion and esfenvalerate, in wheat grain, bran, and flour. The applicat...
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| Format: | Article |
| Language: | English |
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Universidad Nacional Agraria La Molina
2020-08-01
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| Series: | Peruvian Journal of Agronomy |
| Subjects: | |
| Online Access: | https://revistas.lamolina.edu.pe/index.php/jpagronomy/article/view/1510 |
| _version_ | 1818573840553345024 |
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| author | J. Vásquez-Castro G. De Baptista C. Gadanha-Junior J. Bracho-Pérez |
| author_facet | J. Vásquez-Castro G. De Baptista C. Gadanha-Junior J. Bracho-Pérez |
| author_sort | J. Vásquez-Castro |
| collection | DOAJ |
| description | Chemical insecticides are commonly used to control insect pests in stored wheat. However, the presence of insecticide residues in food may endanger consumers. We studied the degradation and persistence of two insecticides, fenitrothion and esfenvalerate, in wheat grain, bran, and flour. The application system was calibrated to treat grain at theoretical concentrations of 10 and 0.5 mg kg−1 of fenitrothion and esfenvalerate, respectively. Samples treated with the insecticide mixture were collected at 0, 15, 30, 60, 90, 120, 180, 240, and 360 days after treatment. Samples were analyzed quantitatively by gas chromatography with an electron capture detector (ECD, Ni63). The experimental design was completely randomized with three replicates. Esfenvalerate was more persistent than fenitrothion, with the residues of both insecticides concentrated mainly in the bran, and with least amounts in the flour. The concentrations of fenitrothion residues during the 120-day preharvest interval exceeded the maximum residue limit (MRL) of 1 mg kg−1 set by Brazilian legislation. We discuss the factors that influence the degradation/persistence of fenitrothion and esfenvalerate. |
| first_indexed | 2024-12-15T00:18:17Z |
| format | Article |
| id | doaj.art-4c9b864c77d641bfa9c8a2c8dca74ea9 |
| institution | Directory Open Access Journal |
| issn | 2616-4477 |
| language | English |
| last_indexed | 2024-12-15T00:18:17Z |
| publishDate | 2020-08-01 |
| publisher | Universidad Nacional Agraria La Molina |
| record_format | Article |
| series | Peruvian Journal of Agronomy |
| spelling | doaj.art-4c9b864c77d641bfa9c8a2c8dca74ea92022-12-21T22:42:23ZengUniversidad Nacional Agraria La MolinaPeruvian Journal of Agronomy2616-44772020-08-0142404710.21704/pja.v4i2.15101425Dissipation of fenitrothion and esfenvalerate in wheat grains, bran and flourJ. Vásquez-Castro0G. De Baptista1C. Gadanha-Junior2J. Bracho-Pérez3Universidad Nacional Agraria La Molina, Departamento de Entomología, Facultad de Agronomía, Av. La Molina s/n, Lima 12, Peru.Universidade de São Paulo (USP), Departamento de Entomologia e Acarologia, Escola Superior de Agricultura “Luiz de Queiroz”, Av. Pádua Dias 11, São Paulo, Brazil.Universidade de São Paulo (USP), Departamento de Engenharia de Biossistemas, Escola Superior de Agricultura “Luiz de Queiroz”, Av. Pádua Dias 11, São Paulo, Brazil.Universidad Nacional Tecnológica de Lima Sur. Facultad de Ingeniería y Gestión. Campus - Sector 3 Grupo 1A 03 - Cercado (Av. Central y Av. Bolívar) - Villa El Salvador, Lima 42, Peru.Chemical insecticides are commonly used to control insect pests in stored wheat. However, the presence of insecticide residues in food may endanger consumers. We studied the degradation and persistence of two insecticides, fenitrothion and esfenvalerate, in wheat grain, bran, and flour. The application system was calibrated to treat grain at theoretical concentrations of 10 and 0.5 mg kg−1 of fenitrothion and esfenvalerate, respectively. Samples treated with the insecticide mixture were collected at 0, 15, 30, 60, 90, 120, 180, 240, and 360 days after treatment. Samples were analyzed quantitatively by gas chromatography with an electron capture detector (ECD, Ni63). The experimental design was completely randomized with three replicates. Esfenvalerate was more persistent than fenitrothion, with the residues of both insecticides concentrated mainly in the bran, and with least amounts in the flour. The concentrations of fenitrothion residues during the 120-day preharvest interval exceeded the maximum residue limit (MRL) of 1 mg kg−1 set by Brazilian legislation. We discuss the factors that influence the degradation/persistence of fenitrothion and esfenvalerate.https://revistas.lamolina.edu.pe/index.php/jpagronomy/article/view/1510degradationpersistencechromatographymaximum residue limitpreharvest interval. |
| spellingShingle | J. Vásquez-Castro G. De Baptista C. Gadanha-Junior J. Bracho-Pérez Dissipation of fenitrothion and esfenvalerate in wheat grains, bran and flour Peruvian Journal of Agronomy degradation persistence chromatography maximum residue limit preharvest interval. |
| title | Dissipation of fenitrothion and esfenvalerate in wheat grains, bran and flour |
| title_full | Dissipation of fenitrothion and esfenvalerate in wheat grains, bran and flour |
| title_fullStr | Dissipation of fenitrothion and esfenvalerate in wheat grains, bran and flour |
| title_full_unstemmed | Dissipation of fenitrothion and esfenvalerate in wheat grains, bran and flour |
| title_short | Dissipation of fenitrothion and esfenvalerate in wheat grains, bran and flour |
| title_sort | dissipation of fenitrothion and esfenvalerate in wheat grains bran and flour |
| topic | degradation persistence chromatography maximum residue limit preharvest interval. |
| url | https://revistas.lamolina.edu.pe/index.php/jpagronomy/article/view/1510 |
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