In some cases in the EU MRLs are also used for ornamental produce, and checked against MRLs for food crops. While this is a sound approach for the general environmental impact, it doesnt reflect potential exposure of people handling ornamentals. A swap test can eliminate this gap. MRLs for ornamental produce can sometimes result in a conflicting outcome because of the absence of pre harvest intervals (PHI) or withholding periods for ornamentals, specifically in crops where harvesting is continuous, like roses. This happens when a grower is following the label recommendations and the produce is sampled shortly after.