In the current EPPO guideline (EPPO, 2010a), the field test is designed as the higher tier for the bee risk assessment of PPPs. In fact, according to the EPPO, field tests provide the most reliable risk assessment because it is based on data gathered under conditions which are most similar to agricultural practice. However, field studies are not often repeated because of the complexity of their establishment and their high cost. Only replicates over time can be conducted but, they are subjected to climate variations. Moreover, several methodological limitations, especially related to honey bees’ underexposure, make it difficult to assess the realistic risk of a given pesticide to bees using field tests. In this section, the problems related to the experimental design of the field test and how to deal with these problems are discussed. The recent considerations from the EFSA Opinion on the risk assessment of PPPs on bees were taken into account (EFSA, 2012).