Thank you for visiting the Washington Tree Fruit Research Commission's website. Since 1969, we've been supporting researchers in their efforts to explore ways to improve fruit storage, decrease insect effects on fruit and grow better fruit which will increase the revenues of the growers of Washington State.
In response to increasing industry concerns about meeting 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 2016 study in apple which included 13 insecticides/acaricides and 7 fungicides, as well as considering the effects on residues from 3 sunburn management programs: overhead cooling, application of a waxy sunburn protectant (Raynox), or application of a calcium carbonate-based fertilizer with sunburn protective qualities (Eclipse). The results of that study are available below, as well as similar reports from previous years on apple and cherry.
2015 WTFRC Cherry Residue Study
2012-2014 WTFRC Cherry Residue Summary
2014 WTFRC Cherry Residue Study
2013 WTFRC Cherry Residue Study
2012 WTFRC Cherry Residue Study
2011 WTFRC Cherry Residue Study
2011 Univ. California Extension Cherry Residue Study
The latest WSU Tree Fruit Endowment Advisory Committee Progress Report is now available! This 2-page document highlights the progress so far in collecting and using grower funds committed in support of the $32 million endowment. These funds are supporting new tree fruit research and outreach staffing and to enhance facilities and orchard operations in Wenatchee and Prosser. To view or download this report, click on the link below.