Evaluation of degradation of organophosphate insecticide residues in stored corn (Zea mays L.) grains
The aims of this work were to monitor the dissipation dynamics of the organophosphate insecticides applied to corn grains stored in supervised experiments, establish the dissipation dynamics and determine the minimum period post application necessary to comply with the established commercial stan...
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Facultad de Ciencias Agropecuarias.
2021
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| Acceso en línea: | https://revistas.unc.edu.ar/index.php/agris/article/view/30806 |
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I10-R10-article-308062022-03-22T13:59:05Z Evaluation of degradation of organophosphate insecticide residues in stored corn (Zea mays L.) grains Evaluación de la degradación de residuos de insecticidas organofosforados en granos de maíz (Zea mays L.) almacenados Strada, J. Bruno, C. Nassetta, M. M. Balzarini, M. G. Conles, M. Y. D., Rojas Ricca, A. P. Cristos, D. Martínez, María José stored maize grain insecticides dissipation kinetics dichlorvos chlorpyrifos-methyl pirimiphos-methyl grano de maíz almacenado insecticidas cinética de disipación diclorvos clorpirifos-metilo pirimifos-metilo The aims of this work were to monitor the dissipation dynamics of the organophosphate insecticides applied to corn grains stored in supervised experiments, establish the dissipation dynamics and determine the minimum period post application necessary to comply with the established commercial standards. The insecticides dichlorvos (DDVP), hlorpyrifosmethyl+deltamethrin (CPM) and pirimiphos-methyl (PMM) were applied to maize grains, which were then stored for 120 days. The samples were processed and extracted using the QuEChERS technique and the pesticide residues were identified and quantified by gas chromatography-mass spectrometry. Deltamethrin residues were not analized. After 90 days of storage, more than 80 % of the initial residue had been degraded, and after 120 days the residues were below the detection limit (LoD). DDVP, CPM and PMM residues followed a first order degradation dynamics [Ct = C0×e(-kt)], with k values of 0.384, 0.025 and 0.020 and estimated half-lives of 1.8, 27.7 and 34.7 days, respectively. These results show that at recommended dosages, the insecticides CPM and PMM are safe for use on stored maize grains; DDVP results provide additional evidence further reasserting its prohibition, which dates back to 2018. Los objetivos del trabajo fueron monitorear la degradación de insecticidas organofosforados aplicados a granos de maíz almacenados en ensayos experimentales, establecer las dinámicas de degradación y determinar el tiempo mínimo de espera post aplicación necesario para cumplir con estándares comerciales. Se aplicaron los insecticidas diclorvós (DDVP), clorpirifós-metil+deltametrina (CPM) y pirimifós-metil (PMM) a granos de maíz almacenados durante 120 días. Las muestras se procesaron y extrajeron mediante la técnica QuEChERS y los residuos de plaguicidas se identificaron y cuantificaron mediante cromatografía de gases-espectrometría de masas.Los residuos de deltametrina no fueron determinados. Luego de 90 días de almacenamiento, más del 80 % del contenido inicial de residuos se había degradado y a los 120 días se encontraban por debajo del límite de detección (LoD). Los residuos de DDVP CPM y PMM siguieron una dinámica de degradación de primer orden [Ct=C0×e(-kt)], con valores de k de 0,384, 0,025 y 0,020 y vidas medias estimadas de 1;8; 27,7 y 34,7 días respectivamente. Estos resultados permiten concluir que a la dosis recomendada, los insecticidas CPM y PMM se pueden usar de manera segura en granos de maíz almacenados, mientras que los resultados de DDVP aportan información adicional que ratifica su prohibición, que data del 2018. Facultad de Ciencias Agropecuarias. 2021-12-30 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf text/html https://revistas.unc.edu.ar/index.php/agris/article/view/30806 AgriScientia; Vol. 38 No. 2 (2021); 53-61 AgriScientia; Vol. 38 Núm. 2 (2021); 53-61 1668-298X 10.31047/1668.298x.v38.n2 eng https://revistas.unc.edu.ar/index.php/agris/article/view/30806/36792 https://revistas.unc.edu.ar/index.php/agris/article/view/30806/37366 Derechos de autor 2021 María José Martínez, C. Bruno, M. M. Nassetta, M. G. Balzarini, M. Y. Conles, Rojas D., A. P. Ricca, D. Cristos https://creativecommons.org/licenses/by-sa/4.0 |
| institution |
Universidad Nacional de Córdoba |
| institution_str |
I-10 |
| repository_str |
R-10 |
| container_title_str |
Revistas de la UNC |
| language |
Inglés |
| format |
Artículo revista |
| topic |
stored maize grain insecticides dissipation kinetics dichlorvos chlorpyrifos-methyl pirimiphos-methyl grano de maíz almacenado insecticidas cinética de disipación diclorvos clorpirifos-metilo pirimifos-metilo |
| spellingShingle |
stored maize grain insecticides dissipation kinetics dichlorvos chlorpyrifos-methyl pirimiphos-methyl grano de maíz almacenado insecticidas cinética de disipación diclorvos clorpirifos-metilo pirimifos-metilo Strada, J. Bruno, C. Nassetta, M. M. Balzarini, M. G. Conles, M. Y. D., Rojas Ricca, A. P. Cristos, D. Martínez, María José Evaluation of degradation of organophosphate insecticide residues in stored corn (Zea mays L.) grains |
| topic_facet |
stored maize grain insecticides dissipation kinetics dichlorvos chlorpyrifos-methyl pirimiphos-methyl grano de maíz almacenado insecticidas cinética de disipación diclorvos clorpirifos-metilo pirimifos-metilo |
| author |
Strada, J. Bruno, C. Nassetta, M. M. Balzarini, M. G. Conles, M. Y. D., Rojas Ricca, A. P. Cristos, D. Martínez, María José |
| author_facet |
Strada, J. Bruno, C. Nassetta, M. M. Balzarini, M. G. Conles, M. Y. D., Rojas Ricca, A. P. Cristos, D. Martínez, María José |
| author_sort |
Strada, J. |
| title |
Evaluation of degradation of organophosphate insecticide residues in stored corn (Zea mays L.) grains |
| title_short |
Evaluation of degradation of organophosphate insecticide residues in stored corn (Zea mays L.) grains |
| title_full |
Evaluation of degradation of organophosphate insecticide residues in stored corn (Zea mays L.) grains |
| title_fullStr |
Evaluation of degradation of organophosphate insecticide residues in stored corn (Zea mays L.) grains |
| title_full_unstemmed |
Evaluation of degradation of organophosphate insecticide residues in stored corn (Zea mays L.) grains |
| title_sort |
evaluation of degradation of organophosphate insecticide residues in stored corn (zea mays l.) grains |
| description |
The aims of this work were to monitor the dissipation dynamics of the organophosphate insecticides applied to corn grains stored in supervised experiments, establish the dissipation dynamics and determine the minimum period post application necessary to comply with the established commercial standards. The insecticides dichlorvos (DDVP), hlorpyrifosmethyl+deltamethrin (CPM) and pirimiphos-methyl (PMM) were applied to maize grains, which were then stored for 120 days. The samples were processed and extracted using the QuEChERS technique and the pesticide residues were identified and quantified by gas chromatography-mass spectrometry. Deltamethrin residues were not analized. After 90 days of storage, more than 80 % of the initial residue had been degraded, and after 120 days the residues were below the detection limit (LoD). DDVP, CPM and PMM residues followed a first order degradation dynamics [Ct = C0×e(-kt)], with k values of 0.384, 0.025 and 0.020 and estimated half-lives of 1.8, 27.7 and 34.7 days, respectively. These results show that at recommended dosages, the insecticides CPM and PMM are safe for use on stored maize grains; DDVP results provide additional evidence further reasserting its prohibition, which dates back to 2018. |
| publisher |
Facultad de Ciencias Agropecuarias. |
| publishDate |
2021 |
| url |
https://revistas.unc.edu.ar/index.php/agris/article/view/30806 |
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