Pesticide Residue Studies
In response to industry concerns regarding Maximum Residue Levels (MRLs) for pesticides in foreign markets, the WTFRC initiated studies in 2011 in apple and cherry to develop some residue data for commonly used insecticides and fungicides to help Washington growers make more informed choices about their spray programs. The WTFRC Internal Program recently completed its 2024 study in cherry at a new location near East Wenatchee. The trial included 11 insecticides/acaricides and 3 fungicides, including four products new to the protocol. The results of that study are available below, as well as similar reports from previous years on apple and cherry; results of an ongoing WTFRC residue study in apple will be posted in September.