Fecha/hora: 16/06/2024 00:12:42

Biblioteca(s): | INIA Las Brujas.
Fecha corriente: | 06/06/2019
Fecha de la última actualización: | 06/06/2019
Autoria: | BESIL, N.; CESIO, V.; LUQUE, E.; PINTOS, P.; RIVAS, F.; HEINZEN, H.
Afiliación: | NATALIA BESIL, Universidad de la República (UdelaR)/ Facultad de Química; VERÓNICA CESIO, Universidad de la República (UdelaR)/ Facultad de Química; MAYZA ELEANA LUQUE NUÑEZ, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; PEDRO MAXIMILIANO PINTOS RODRIGUEZ, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; CARLOS FERNANDO RIVAS GRELA, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; HORACIO HEINZEN, Universidad de la República (UdelaR)/ Facultad de Química.
Título: | Dissipation of pre-harvest pesticides on "Clementine" mandarins after open field application, and their persistence when stored under conventional postharvest conditions.
Año de publicación: | 2018
Fuente/Imprenta: | Horticulturae. 2018, vol.4, Issue 4:55.
DOI: | 10.3390/horticulturae4040055
Idioma: | Inglés

Notas:

Article history: Received: 13 October 2018 / Revised: 11 December 2018 / Accepted: 12 December 2018 / Published: 18 December 2018.
This article belongs to the Special Issue Postharvest Disease Development: Pre and/or Postharvest Practices.

Contenido:

ABSTRACT.
The dissipation of field-applied difenoconazole, imidacloprid, pyraclostrobin and spinosad on Clementine mandarins (Citrus clementina Hort. ex Tan.) under controlled conditions throughout the citrus production chain was assessed. At harvest, 42 days after application, the dissipation of these pesticides were 80, 92, and 48% for difenoconazole, imidacloprid, pyraclostrobin, respectively, and spinosad was below the level of detectability. At day 28 after application, spinosad was no longer detected. The model equations that best describe the dissipation curves of these pesticides on Clementine mandarins showed different patterns. Their half-life on Clementine, calculated by the best-fitted experimental data, were 19.2 day (1st-order model) for difenoconazole, 4.1 day (Root Factor (RF) 1st-order model) for imidacloprid, 39.8 day (2nd-order model) for pyraclostrobin and 5.8 day (1st-order model) for spinosad. These results are the first record of pyraclostrobin persistence on mandarins, showing a longer half-life in this matrix than those reported for any other fruit. The treated fruit were harvested and submitted to the usual postharvest treatments: first, a hypochlorite drenching was performed; as a second step, imazalil and wax were applied, and then the mandarins were stored at 4 °C. After 32 days, cold storage caused no significant effects on the residue levels of the four pesticides compared with those determined on freshly harvested mandarins. All residues were below their Codex and European Union (EU) maximum residue limit (MRL) for mandarin since the spray application day.

Palabras-Clave: | DEGRADATION DYNAMIC; LC-MS/MS; PESTICIDE RESIDUES.
Thesagro: | CITRUS.
Categoría del tema: | F01 Cultivo

URL:

http://www.ainfo.inia.uy/digital/bitstream/item/12791/1/horticulturae-04-00055.pdf
https://www.mdpi.com/2311-7524/4/4/55

Registro original: | INIA Las Brujas (LB)
Ejemplares: | LB - (101837-1) - PXI - AP - DD - PP/HORTICULTURAE/2018 -  -  - DIS