Fecha/hora: 16/06/2024 06:20:57

Biblioteca(s): | INIA La Estanzuela.
Fecha corriente: | 30/09/2014
Fecha de la última actualización: | 25/01/2019
Autoria: | GALIETTA, G.; EGANA,  E.; GEMELLI, F.; MAESO, D.; CASCO, M.; CONDE, P.
Afiliación: | DIEGO CESAR MAESO TOZZI, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; MARIA NOELIA CASCO MILA, Instituto Nacional de Investigación Agropecuaria (INIA), Uruguay; ANA PAULA CONDE INNAMORATO, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay.
Título: | Pesticide dissipation curves in peach, pear and tomato crops in Uruguay.
Año de publicación: | 2011
Fuente/Imprenta: | Journal of Environmental Science and Health :part B Pesticides, Food Contaminants, and Agricultural Wastes, v. 46, n.1, p. 35-40, 2011.
ISSN: | 0360-1234
DOI: | 10.1080/03601234.2010.515504
Idioma: | Inglés
Notas: | Article history: Received 02 Jun 2010, Published online: 10 Dec 2010.

Contenido:

Abstract:
Dissipation curves of azoxystrobin and of the neonicotinoids acetamiprid and thiacloprid in peach; azinphos-methyl and carbaryl in pear and azoxystrobin, chlorfenapyr and chlorpyrifos in high-tunnel tomato crops were studied in the Southern region of Uruguay. An analytical methodology based on solid phase extraction (SPE) and detection by High Performance Liquid Chromatography with Diode Array Detector (HPLC/DAD) was used for acetamiprid and thiacloprid. Coupled SPE and detection by Gas Chromatography with Mass Selective Detector (GC/MSD) was used for the detection of azinphos-methyl, azoxystrobin, carbaryl, chlorfenapyr and chlorpyrifos residues. Curves were modeled mathematically with Solver program of Microsoft Excel. The best fit for acetamiprid and thiacloprid in peach was achieved with the exponential model (r(2)=0.961 and 0.944, respectively). In the case of peach fruits there is not a Maximum Residue Limit (MRL) for acetamiprid in the Codex Alimentarius, while 0.5 mg/kg is the value rated for thiacloprid. The MRLs accepted by the European Union (EU) are 0.1 mg/kg for acetamiprid and 0.3 mg/kg for thiacloprid. According to the curves determined in these experiments, thiacloprid residues 10 to 12 days after application (daa) were below the MRLs established by both sources. In the case of acetamiprid, 25 daa would be required, according to the exponential mathematical model, to get residues levels below the MRL values established by the EU. For azinphos methyl in pear, the residues detected were mathematically fitted to an exponential model (r(2)=0.999). According to it, residue levels under the MRL established by the EU (0.05 mg/kg) are gotten in our conditions in 20 daa. In plastic tunnel tomato chlorfenapyr residues were not detected from 16 daa, having the dissipation curve an exponential trend. In the same condition, there was not a decay of the azoxystrobin concentration during a 24-day trial, being it around 0.40 ± 0.05 mg/kg.

Palabras-Clave: | CURVAS DE DISIPACIÓN; DISSIPATION CURVES; DURAZNO; GC/MSD; HPLC/DAD; HPLC/PAPA; PEACH; PEAR; PERA; PESTICIDAS DE RESIDUOS; RESIDUES PESTICIDES; TOMATE; TOMATO.
Thesagro: | FRUTICULTURA; HORTICULTURA.
Categoría del tema: | F01 Cultivo
Registro original: | INIA La Estanzuela (LE)
Ejemplares: | LE - (100326-1) - PXI - AP - DD -  -  -  - DIS