Article Dans Une Revue Science of the Total Environment Année : 2015

Quantification of potential exposure of gray partridge (Perdix perdix) to pesticide active substances in farmlands

Quantification de l'exposition potentielle des perdrix grises (Perdix perdix) aux substances actives pesticides en plaine de grande culture (article en anglais)

Résumé

In this paper, we propose an ecologically-relevant methodology to estimate potential exposure to active substances (ASs) of a farmland focal bird, the gray partridge Perdix perdix. It is based on bird habitat use of fields at the time of pesticide applications. It accounts for spatio-temporal heterogeneity at population and landscape scales. We identify and quantify the potential exposure to 179 ASs of 140 clutches during pre-laying, laying, and incubation phases, and of 75 coveys. The data come from a large scale field study combining radiotelemetry and a farmer survey. They were collected in 12 different representative sites. The proportion of clutches potentially exposed to a given chemical was ≥5% for 32 ASs; prothioconazole and epoxiconazole ranking first. 71% of clutches were potentially exposed to ≥ 1 AS and 67% to ≥2 ASs. Mixtures involved 2 to 22 ASs. They emerged from commercial formulations, tank mixtures, bird habitat use, and combinations. ASs were fungicides (53%), herbicides (25%), and insecticides (16%) used on a variety of crops in April–June, when ground-nesting birds are breeding. The European Food Safety Authority conclusions report a long-term first-tier toxicity-to-exposure ratio (TERlt) b5 for 11 out of 19 documented ASs, and higher-tier TERlt b5 for 5 out of 10 ASs. This suggests a potential risk for bird reproduction in farmlands. Globally 13% of coveys were potentially exposed to 18 ASs during the first month (1–4 coveys per AS).
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hal-04335759 , version 1 (11-12-2023)

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Elisabeth BRO, Florian Millot, Anouk Decors, James Devillers. Quantification of potential exposure of gray partridge (Perdix perdix) to pesticide active substances in farmlands. Science of the Total Environment, 2015, 521-522, pp.315-325. ⟨10.1016/j.scitotenv.2015.03.073⟩. ⟨hal-04335759⟩

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