Guidance Residue Levels (GRLs) have been developed by the CORESTA Agro-Chemical Advisory Committee (ACAC) to provide guidance to tobacco growers and those in the tobacco industry with interest in the application of Crop Protection Agents (CPAs) that are in compliance with the implementation of Good Agricultural Practices (GAP). Residue data from field trials complying with label instructions are an essential part of the process to establish GRLs. To this end the Agrochemicals Field Trials Task Force (RFT TF) (now a Sub-Group) was established. In the light of the objectives of the group, this report describes the second 3-year trial programme and the main achievements from 2016 through to 2018.