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 pesticides to help Washington growers make more informed choices about their spray programs. The WTFRC Internal Program recently completed a 2014 study in cherry which included 18 insecticides/acaricides and 10 fungicides, as well as considering the effects on residues from two commonly used protectants used to reduce rain-induced cracking. The results of that study are available below, as well as reports from previous years on apple and cherry; results of an ongoing WTFRC residue study in apple will be posted in early September.
The Washington Tree Fruit Research Commission (WTFRC) Internal Program has developed a starch index for Honeycrisp (scale 1-6) based on actual starch patterns observed for fruit grown in Washington State. To download a copy, click on the link below.
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.
The SWD update page is now operational on the WSU Extension website. For the latest information on spotted wing drosophila, visit SWD update - WSU Extension