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 chemistries to help Washington growers make more informed choices about their spray programs. Comprehensive summaries of those studies are available below, as well as individual reports from each year on apple and cherry and a 2011 project on cherry insecticide residues conducted by David Haviland of the University of California Cooperative Extension.
The WTFRC internal program has developed a grower version of a bench-top test to determine cherry cracking susceptibility. Detailed instructions can be downloaded by clicking on the link below.