PESTICIDE RESIDUES IN THE VINEYARD ENVIRONMENTS: VINE LEAVES, GRAPE BERRIES, WINES, HONEYBEES AND ASIAN HORNETS
Abstract
Synthetic pesticides are widely used in viticulture to ensure steady harvest quality and quantity. Fungicides are primarily used to control grapevine diseases but insecticides and herbicides are likewise used. Pesticide residues in viticultural areas currently represent a strong societal concern, but may also affect different trophic chains in such areas. In this project we wish to analyse honeybees collected from hives placed in different vineyards, their natural predator (the invasive hornet Vespa velutina), as well as the honey, grape berries, and wines produced. In order to screen the different pesticides found in our study areas, it was first necessary to optimize the extraction procedure. Pesticide residues in plant matrices such as leaf or grape berry are regularly monitored at the ISVV using QuEChERS (Quick, Easy, Cheap, Effective, Rugged and Safe) extraction followed by LC-MS/MS analysis. A QuEChERS method was adapted based on previously published work in order to analyse honeybees and single hornets, for which the quantity of samples is limited. The method was improved using a zirconium-based sorbent for d-SPE, which is used to reduce the matrix effect in lipidic commodities. The performance of this developed method was evaluated for 42 pesticide residues. A significant matrix effect was however noted for some molecules, thus procedural calibration was used to quantify pesticide residues in real samples. Methodological developments and pesticide residue quantification results in various matrices will be presented.
DOI:
Issue: OENO Macrowine 2023
Type: Poster
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Keywords
analysis, pesticide contamination , QuEChERS, LC-MS/MS