Toxicological Stability of Piper aduncum L. Essential Oil During Storage Against Stored-Product Insect Pests.
6 affiliations
- 1Center for Biological and Natural Sciences, Universidade Federal do Acre, Rio Branco 69920-900, AC, Brazil.
- 2Instituto Federal do Maranhão, Campus Codó, Codó 65400-000, MA, Brazil.
- 3Instituto Federal de Mato Grosso do Sul, Campus Naviraí, Naviraí 79950-000, MS, Brazil.
- 4Instituto Federal de Mato Grosso do Sul, Campus Nova Andradina, Nova Andradina 79750-000, MS, Brazil.
- 5Universidade Federal do Piauí, Campus Amílcar Ferreira Sobral, Floriano 64800-000, PI, Brazil.
- 6Department of Plant Science, Agricultural Science Center, Universidade Federal do Piauí, Teresina 64049-550, PI, Brazil.
Abstract
Piper aduncum L. essential oil (PAEO) has insecticidal potential, but its performance under different storage conditions remains incompletely characterized. We compared PAEO stored at 5, 20, or 35 °C protected from light and, in a separate experiment at 20 °C, under light-protected or light-exposed conditions. Adults of four stored-product beetle species were tested after 4, 8, and 12 months. Initial GC-MS characterization showed that dillapiole accounted for 70.34% of the chromatographic area. Replicate-level mortality counts were analyzed using binomial-probit models. Assessment time was associated with concentration-mortality responses for all four species; the trajectories were species dependent and often non-monotonic. Exploratory within-assessment model comparisons generally showed higher median lethal concentrations for the bottles stored at 35 °C or exposed to light at 4 and 8 months, although these patterns differed by species. The storage experiments were not factorial. Each condition had one oil bottle, and differences between assessment dates cannot be attributed solely to oil aging because concurrent fresh-oil controls were unavailable. PAEO remained insecticidally active at each assessment, but chemical changes and their mechanisms were not tested longitudinally.
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BibTeX
@article{tamwing2026toxicological,
title = {{Toxicological Stability of Piper aduncum L. Essential Oil During Storage Against Stored-Product Insect Pests.}},
author = {Gabriela da Silva Tamwing and Guilherme Calado de Almeida and Josiane Moura do Nascimento and Roger Ventura Oliveira and Cleyton Silva de Araújo and Giovana Lopes da Silva and Mariano Oscar Aníbal Ibañez Rojas and Francisco José Teixeira Gonçalves and Leonardo Baltazar Cantanhede and Douglas Rafael E Silva Barbosa and Marcela Silva Carvalho and Gutierres Nelson Silva and Lucas Martins Lopes and Maria Regiane Araujo Soares and Adalberto Hipólito de Sousa},
journal = {Insects},
year = {2026},
month = oct,
doi = {10.3390/insects17101084},
url = {https://europepmc.org/article/MED/42940992},
note = {CC BY},
}
RIS
TY - JOUR
TI - Toxicological Stability of Piper aduncum L. Essential Oil During Storage Against Stored-Product Insect Pests.
AU - Gabriela da Silva Tamwing
AU - Guilherme Calado de Almeida
AU - Josiane Moura do Nascimento
AU - Roger Ventura Oliveira
AU - Cleyton Silva de Araújo
AU - Giovana Lopes da Silva
AU - Mariano Oscar Aníbal Ibañez Rojas
AU - Francisco José Teixeira Gonçalves
AU - Leonardo Baltazar Cantanhede
AU - Douglas Rafael E Silva Barbosa
AU - Marcela Silva Carvalho
AU - Gutierres Nelson Silva
AU - Lucas Martins Lopes
AU - Maria Regiane Araujo Soares
AU - Adalberto Hipólito de Sousa
PY - 2026
DA - 2026/10/20
JO - Insects
DO - 10.3390/insects17101084
UR - https://europepmc.org/article/MED/42940992
AB - Piper aduncum L. essential oil (PAEO) has insecticidal potential, but its performance under different storage conditions remains incompletely characterized. We compared PAEO stored at 5, 20, or 35 °C protected from light and, in a separate experiment at 20 °C, under light-protected or light-exposed conditions. Adults of four stored-product beetle species were tested after 4, 8, and 12 months. Initial GC-MS characterization showed that dillapiole accounted for 70.34% of the chromatographic area. Replicate-level mortality counts were analyzed using binomial-probit models. Assessment time was associated with concentration-mortality responses for all four species; the trajectories were species dependent and often non-monotonic. Exploratory within-assessment model comparisons generally showed higher median lethal concentrations for the bottles stored at 35 °C or exposed to light at 4 and 8 months, although these patterns differed by species. The storage experiments were not factorial. Each condition had one oil bottle, and differences between assessment dates cannot be attributed solely to oil aging because concurrent fresh-oil controls were unavailable. PAEO remained insecticidally active at each assessment, but chemical changes and their mechanisms were not tested longitudinally.
SN - 2075-4450
ER -