This report gives guidance for summarizing and evaluating field studies with non-target arthropods. Plant protection products can cause harmful effects on non-target organisms. A guidance document has been developed for ensuring that the test results required for the registration of pesticides be supplied in a uniform and transparent manner. This document is specifically directed at experiments with non-target arthropods, living on the soil surface or on the vegetation, for example on arable land or in orchards. With this dossier Ctgb assesses whether a certain use of a plant protection product is allowed in the Netherlands. Complex and extensive information concerning field studies with non-target arthropods can be part of the dossier. In the Netherlands, these reports are evaluated by different evaluating institutes. Potential differences in the evaluator’s methodology may lead to a lack of uniformity in the form and content of the summaries and evaluations and – occasionally – in the conclusions. This was the reason for Ctgb to ask for standardization of the summaries and evaluation of field studies with non-target arthropods. Apart from the guidance, the report contains two elaborated examples of evaluating reports and recommendations for the use of the results of a particular field study for the risk assessment. This concerns, for example, the extrapolation of the results of a particular field study in a particular crop and region to the crop and region relevant for the registration. ; Gewasbeschermingsmiddelen kunnen schadelijke effecten hebben op organismen waarvoor ze niet zijn bedoeld. Er is een richtsnoer ontwikkeld om testresultaten voor de toelatingsprocedure voor gewasbeschermingsmiddelen eenvormig en transparant aan te reiken. Het richtsnoer geldt specifiek voor veldstudies met niet-doelwit arthropoden (geleedpotigen) die boven de grond en op planten leven, bijvoorbeeld in akkers of boomgaarden. Het richtsnoer is ontwikkeld door het Nederlandse Platform voor de Beoordeling van Higher Tier Studies, ...