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Exposure assessment for terrestrial non-target arthropods

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Abstract

Concerns regarding the potential of pesticides to harm terrestrial non-target arthropod populations have led to the increased use of ecotoxicological test systems for terrestrial Non-target Arthropod risk assessment. Whilst some useful guidance on terrestrial invertebrate test systems is available, there are significant gaps in guidance for terrestrial non-target arthropod exposure estimates. The typical exposure in the standard test systems is by application of the test substance at the field rate (i. e. gram substance per hectare field) on to a two dimensional surface. However, under field conditions such a spray deposit will be diluted over the total available 3-Dimensional plant and soil surface. The recommendation is to use published leaf area index and crop interception values to standardize terrestrial dilution factors, which can then be used to predict exposure on a 3-Dimensional plant surface. Based on average crop/time specific LAI data for 26 crops, a surrogate off-crop dilution factor of 12 was calculated which can be used to convert 2-Dimensional spray drift exposure to 3-Dimensional off-crop plant surface exposure. Another significant terrestrial exposure guidance gap is how to calculate predicted environmental concentrations (PECs) for multiple application products. Based on spray interval and half-life data from 32 representative multiple application plant protection products, the typical worst-case PECs for accumulation of residues were calculated after up to 8 applications. These data showed that Multiple Application Factors (MAFs = accumulated PEC/initial PEC), increased from 1 to 3.5 after 1 to 8 applications, respectively. Finally, overall 90th percentile spray deposit values have been proposed for deriving off-crop multiple applications PECs (1 to 8 applications) based on published spray drift data. The recommended equations for terrestrial exposure assessment include the use of:-application rate, the 90th percentile drift value, the multiple application factors (MAF) and the standard dilution factor (for 3-Dimensional plant surface). This proposed terrestrial non-target arthropod exposure scheme is comparable with other first tier exposure assessment schemes eg aquatic exposure assessment.

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References

  1. Barret, K. L., Grandy, N., Harrison, E. G., Hassan, S., Oomen, P., 1994: Guidance Document on Regulatory Testing Procedures for Pesticides with Non Target Arthropods. From the ESCORT workshop, Wageningen, Netherlands, March 1994, SETAC-Europe, Brussels.

  2. Becker, F. A., Klein, A.W., Winkler, R., Jung, B., Bleiholder, H., Schmider, F., 1999: The degree of ground coverage by arable crops as a help in estimating the amount of spray solution interception by plants. Nachrichtenbl. Deut. Pflan-zenschutzd.51, 237–242.

  3. Council Directive, 1991: Council Directive of 15 July 1991 concerning the placing of Plant Protection Products on the market (91/414/EEC). Offic. Journ. Europ. Commun.L230, 1–32.

  4. Council Directive (1994). Council Directive 94/43/EC of 27 July 1994 establishing Annex VI to Directive 91/414/EEC concerning the placing of Plant Protection Products on the market (91/414/EEC). Offic. Journ. Europ. Commun.L227, 31–55.

  5. Council Directive (1996). Council Directive 96/12/EC of 8 March 1996 amending Council Directive 91/414/EEC concerning the placing of Plant Protection Products on the market (91/414/EEC). Offic. Journ. Europ. Commun.L65, 20–37.

  6. De Snoo,G.R., de Wit,P. J., 1998: Buffer Zones for Reducing Pesticide Drift to Ditches and Risks to Aquatic Organisms. Ecotoxicology and Environmental Safety41, 112–118.

  7. Fachgruppe Anwendungstechnik, BBA, 2000: Neue Abtrifteckwerte. Mitt. Biol. Bundesanst. Land-Forstw. Berlin-Dahlem, in press.

  8. Focus 1996: Soil Persistence Models and EU Registration of Plant Protection Products. Report from the FOCUS Soil Workgroup, EU document 7617/VI/96.

  9. Focus 2000: “FOCUS groundwater scenarios in the EU pesticide registration process”. Report from the FOCUS Groundwater Scenarios Workgroup, EC Document Reference xxxxx, 195pp.

  10. Focus surface water group (in prep.): FOCUS surface water step 1 and step 2 calculator.

  11. Forster, R., Rothert, H., 1999: Zulassung von Pflanzenschutzmitteln gemäss Richtlinie 91/414/EWG — Ein Konzept zur Risikominimierung für Nichtzielarthropoden, insbesondere auf Nichtzielflächen. Nachrichtenbl. Dtsch. Pflanzenschutzd.51 (5), 237–242.

  12. Ganzelmeier, H., Rautmann, D., 2000: Drift, drift reducing sprayers and sprayer testing. Aspects of Appl. Biol.57, 1–10.

  13. Ganzelmeier, H.,Rautmann, D.,Spangenberg, R.,Streloke, M.,Herrmann, M.,Wenzelburger, H.-J.,Walter, H.-F., 1995: Studies on the spray drift of plant protection products. Mitt.Biol.Bundesanst.Land- Forstwirtsch. Berlin-Dahlem, Heft 305.

  14. Koch, H., Schietinger, R., 1999: On the need far a balanced risk assessment on aquatic organisms in the registration process of plant protection products. Gesunde Pflanzen51 (8), 266–272.

  15. Murschel-Raasch, B., 1991: Die Entwicklung eines Informationssystems zur Reduzierung der Erosion und des Stoffaustrages am Beispiel von Ackerböden im Kraichau. — Diss. Univ. Hohenheim.

  16. Odum, P., 1983: Fundamentals of Ecology (German translation). Thieme Verlag. Stuttgart. 2nd Edition, pp 70–71.

  17. Pesticide Safety Directorate, 1999: Local Environmental Risk Assessments for Pesticides. A Practical Guide. Available in the Internet at http://www.maff.gov.uk/aboutmaf/agency/ psd/leraps/guide.htm.

  18. Streloke, M., Rothert, H., 1999: Bewertung der Auswirkung auf Gewässerorganismen sowie Erteilung geeigneter Auflagen zur Risikominimierung. Nachrichtenbl. Deut. Pflanzenschutzd.51 (11), 295–298.

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Correspondence to J. F. Gonzalez-Valero or P. J. Campbell or H. J. Fritsch or R. Grau or K. Romijn.

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Gonzalez-Valero, J.F., Campbell, P.J., Fritsch, H.J. et al. Exposure assessment for terrestrial non-target arthropods. J. Pest Science 73, 163–168 (2000). https://doi.org/10.1007/BF02956453

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Keywords

  • Leaf Area Index
  • Exposure Assessment
  • Spray Deposit
  • Plant Protection Product
  • Spray Drift