According to Article 12 of Regulation (EC) No 396/2005, EFSA has reviewed the maximum residue levels (MRLs) currently established at European level for the pesticide active substance quizalofop-P-ethyl, quizalofop-P-tefuryl and propaquizafop. To assess the occurrence of quizalofop-P-ethyl, quizalofop-P-tefuryl and propaquizafop residues in plants, processed commodities, rotational crops and livestock, EFSA considered the conclusions derived in the framework of Directive 91/414/EEC as well as the European authorisations reported by Member States (including the supporting residues data). Based on the assessment of the available data, MRL proposals were derived and a consumer risk assessment was carried out. Although no apparent risk to consumers was identified, some information required by the regulatory framework was missing. Hence, the consumer risk assessment is considered indicative only and all MRL proposals derived by EFSA still require further consideration by risk managers.
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| http://dx.doi.org/10.2903/j.efsa.2017.5050 | DOI Listing |
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The applicant Arysta Life Science Great Britain Limited submitted a request to the competent national authority in Croatia to evaluate the confirmatory data that were identified for quizalofop-P-tefuryl in the framework of the maximum residue level (MRL) review under Article 12 of Regulation (EC) No 396/2005 as not available. Since Article 12 data gaps were also set for the two other quizalofop-P variants sharing the same residue definitions for risk assessment and monitoring, EFSA included in the present assessment all quizalofop-P variants: quizalofop-P-ethyl, quizalofop-P-tefuryl and propaquizafop. Moreover, in the application submitted to Croatia, the applicant also included a request to modify the existing MRLs for quizalofop-P-tefuryl in grapes, sunflower seeds and soyabeans in accordance with Article 6 of Regulation (EC) No 396/2005.
View Article and Find Full Text PDFIn accordance with Article 6 of Regulation (EC) No 396/2005, the applicant Adama Agan Ltd submitted a request to the competent national authority in Italy to modify the existing maximum residue levels (MRLs) for propaquizafop/quizalofop in lettuces and salad plants to accommodate the intended SEU use of propaquizafop. The data submitted in support of the request were found to be sufficient to derive MRL proposals of 0.15 mg/kg for the intended SEU use of propaquizafop for the crops belonging to the crop group of lettuces and salad plants.
View Article and Find Full Text PDFBehavior of quizalofop-p and its commercial products in water by liquid chromatography coupled to high resolution mass spectrometry.
Ecotoxicol Environ Saf
August 2018
Research Group "Analytical Chemistry of Contaminants", Department of Chemistry and Physics, Andalusian Center for the Evaluation and Monitoring of Global Change (CAESCG), University of Almería, Agrifood Campus of International Excellence, ceiA3, E-04120 Almeria, Spain. Electronic address:
A degradation study of quizalofop-p and its commercial products (quizalofop-p-ethyl, quizalofop-p-tefuryl and propaquizafop) in water samples has been performed using ultra high-performance liquid chromatography coupled to Orbitrap mass spectrometry (UHPLC-Orbitrap-MS). CHHQ (dihydroxychloroquinoxalin), CHQ (6-chloroquinoxalin-2-ol) and PPA ((R)-2-(4-hydroxyphenoxy)propionicacid) were the main metabolites of this active substance (quizalofop-p) in water. The degradation of the parent compound has been monitored in distilled water.
View Article and Find Full Text PDFAccording to Article 12 of Regulation (EC) No 396/2005, EFSA has reviewed the maximum residue levels (MRLs) currently established at European level for the pesticide active substance quizalofop-P-ethyl, quizalofop-P-tefuryl and propaquizafop. To assess the occurrence of quizalofop-P-ethyl, quizalofop-P-tefuryl and propaquizafop residues in plants, processed commodities, rotational crops and livestock, EFSA considered the conclusions derived in the framework of Directive 91/414/EEC as well as the European authorisations reported by Member States (including the supporting residues data). Based on the assessment of the available data, MRL proposals were derived and a consumer risk assessment was carried out.
View Article and Find Full Text PDFDegradation studies of quizalofop-p and related compounds in soils using liquid chromatography coupled to low and high resolution mass analyzers.
Sci Total Environ
December 2017
Department of Chemistry and Physics, Research Centre for Agricultural and Food Biotechnology (BITAL), University of Almería, Agrifood Campus of International Excellence, ceiA3, E-04120 Almería, Spain.. Electronic address:
A comprehensive degradation study of quizalofop-p, quizalofop-p-ethyl, quizalofop-p-tefuryl and propaquizafop in soil samples have been firstly performed using ultra high performance liquid chromatography coupled to Orbitrap mass spectrometry (UHPLC-Orbitrap-MS). Thus, metabolites or degradation products, such as CHHQ (dihydroxychloroquinoxalin), CHQ (6-chloroquinoxalin-2-ol), PPA ((R)-2-(4-hydroxyphenoxy)propionic acid) and 2,3-dihydroxyquinoxaline were also monitored. An extraction procedure based on QuEChERS procedure was used.
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