Quantification of pesticide residues in the topsoil of Belgian fruit orchards: terrestrial environmental risk assessment

Pest Management Science
Gregor Claus, Pieter Spanoghe

Abstract

Pesticides are widely used in fruit orchards. In the context of integrated pest management (IPM) Flemish farmers are advised to restrict the use of pesticides. However, residues of pesticides could still pose a threat to beneficial organisms. To date, it is not well known which residues are present in IPM orchards. This study focuses on the pesticide concentration in the topsoil and the implications for soil-dwelling organisms. Topsoil was sampled in ten sweet cherry (Prunus avium (L.) L.) and eight apple (Malus domestica Borkh.) orchards in Flanders (Belgium), to quantify the concentration of pesticide residues. Topsoil was selected because it is a major exposure route for beneficials. Pesticides from current spraying schedules and formerly used pesticides were found. In addition an environmental risk assessment was performed with a species sensitivity distribution (SSD) and a toxicity/exposure ratio (TER) approach. The SSD approach led to a more conservative outcome. None of the pesticides in the spraying schedule revealed a risk, although some of the persistent and banned pesticides still possibly pose a risk. Spraying schedules are good predictors of environmental contamination. Monitoring residues remains essential to dete...Continue Reading

References

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Jun 13, 2006·Food Additives and Contaminants·Helen FerrierPaul Elliott
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Feb 13, 2016·Food Chemistry·Michael HoubrakenPieter Spanoghe
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Feb 15, 2019·The Science of the Total Environment·Vera SilvaViolette Geissen
Apr 18, 2019·Environmental Toxicology and Chemistry·G J Carr, S E Belanger

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