| Autor: |
Niell, Silvina, Santos, Estela, Zanetti, Guillermo, Zabalegui, Hugo, Jesús, Florencia, Dorrego, Melina, Genolet, Romina, Pequeño, Fiamma, Gérez, Natalia, Cesio, Verónica, Heinzen, Horacio |
| Předmět: |
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| Zdroj: |
Julius-Kühn-Archiv; 2023, Issue 474, p80-89, 10p |
| Abstrakt: |
The starting point of this work was beekeeper´s and farmer´s concern about the pollution of “Laguna del Cisne”, an important lagoon basin in Uruguay, which is going into a productive reconversion towards pesticides use reduction. Based on previous studies of beehives as biomonitors of pesticide residues, a monitoring was designed and jointly developed. Swarms from the region were captured and hives with new material installed. Five beehives were settled in 8 selected environments: a native forest and agroecosystems involving rice crops, soybean, fruit orchards and horticulture. Five seasonal samplings (January 2019 - May 2020) were performed. The botanical richness of pollen and honey samples was determined (Louveaux et al, 1978). A total of 156 samples of bees (40), wax (40), beebread (36) and honey (40) were analyzed. QuEChERS based multiresidue methodologies followed by GC-MS/MS and LC-MS/MS determinations were employed. From a selection of the most used and toxicologically relevant pesticides, 89, 82, 104 and 103 analytes in bees, wax, beebread and honey respectively were validated according to SANTE/11813/2017 guidelines. LOQs ranged 0.0001-0.100 mg kg-1 . From the 44 pesticides and metabolites found 10 were herbicides, 15 fungicides and 19 insecticides. Except 3 samples, concentrations ranged 0.001 - 0.05 mg kg-1 . Highest frequencies and number of detections were found in wax and beebread in accordance with our previous monitoring study (2014- 2017). Pesticides profile found in each apiary reflected the land use within its ecosystem. A highlight was the involvement and dialogue between producers and academia in order to advance towards bee protection. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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