Since 2011, the WTFRC has conducted studies in apple and cherry to generate residue data for commonly used pesticides to help Washington growers make more informed choices about their spray programs with respect to concerns about Maximum Residue Levels (MRLs) in export markets. The WTFRC Internal Program recently completed its 2025 study in apple which included 14 insecticides/acaricides, 4 fungicides, and 3 plant growth regulators in two distinct application scenarios in a modern high-density ‘Gala’ orchard. The report from that study and a summary report of all earlier WTFRC apple residue studies (2011-2024), as well as previous summaries and annual reports from similar projects on apple and cherry are now available through this link to the WTFRC homepage, under “Pesticide Residue Studies.”
