Data on field dissipation/accumulation studies conducted at foreign sites are often submitted to the regulatory agencies worldwide under national and global joint reviews for the registration of pest control products. Region-specific soil characteristics (pH, organic carbon, and texture) and climatic conditions (precipitation and temperature) determine, to a large extent, the fate and behaviour of a chemical. A chemical is expected to behave similarly in ecoregions that are based on similar soils and climate. Studies conducted at foreign sites are generally considered if the study sites represent local use conditions. As no ecoregion analysis based on soils and climate together is currently available, ENASGIPS (Europe North America Soil Geographic Information for Pesticide Studies) is being developed under OECD to identify comparable ecoregions between Europe and North America. The purpose of ENASGIPS model is to compare and identify similar ecoregions and to assist in site selection. This model is based on ArcGIS and uses Harmonized World Soil Database for soils and MARS FOODSEC for climate to compare and identify similar ecoregions between Europe and North America. Thus, a field study conducted in Europe can be considered by the North American regulatory agencies and vice versa. Currently in the European Union,  FOCUS guidance is used to facilitate use of overseas TFD studies for regulatory purposes. In addition, the model permits selection of field sites based on concerns identified by the conceptual model and acceptable to regulatory authorities in both continents. It involves a series of selection of crops, soil and climatic parameters. Distribution of crops is based on Interpolated Census of agriculture to Soil Landscapes for Canada, US Agricultural Census (STATSGO) for USA and CAPRI EU15+EU12 for Europe. Note: The content of this presentation does not necessarily represent the official views of the OECD and its member countries, the EU Commission, or EFSA.

OECD guidance for acceptance of foreign pesticide field dissipation studies and ecoregion concept

246th National Meeting (2013)

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