Evaluation of pesticide leaching in lysimeter and field studies. Parent substances

The report gives recommendations for the interpretation of lysimeter, field and simulation studies in a more consistent and objective way. Expert judgement has been converted as much as possible in quantitative rules for evaluation. The lysimeter or field study is to be computer-simulated as good as possible and the result is compared with measured leaching. The relative difference, here defined as the simulation error, is considered to be the endpoint of the evaluation of a lysimeter or field study. The simulation will be used as a correction for the pesticide leaching computed for a scenario relevant for the registration of the pesticide