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 2019 study in cherry which included 12 insecticides/acaricides and 5 fungicides, including a few new products. 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.
2019 WTFRC Cherry Residue Study
2018 Apple Residue Study 2018 WTFRC Cherry Residue Study
2012 - 2017 Apple Residue Summary 2012 - 2017 Cherry Residue Summary
2017 WTFRC Apple Residue Study 2017 WTFRC Cherry Residue Study
2016 WTFRC Apple Residue Study 2016 WTFRC Cherry Residue Study
2015 WTFRC Apple Residue Study 2015 WTFRC Cherry Residue Study
2011-2014 WTFRC Apple Residue Summary 2012-2014 WTFRC Cherry Residue Summary
2014 WTFRC Apple Residue Study 2014 WTFRC Cherry Residue Study
2013 WTFRC Apple Residue Study 2013 WTFRC Cherry Residue Study
2012 WTFRC Apple Residue Study 2012 WTFRC Cherry Residue Study
2011 WTFRC Apple Residue Study 2011 WTFRC Cherry Residue Study
2011 Univ. California Extension Cherry Residue Study
It is critical that growers act now to aggressively manage Little Cherry Disease. Now, after harvest is the time to sample for infected trees and remove trees that test positive. Manage vectors postharvest to help limit the spread of the pathogen. Removal of infected trees is paramount to slowing down the spread of the pathogen.
Western X is present across North America, throughout Washington State, and at epidemic levels in the Columbia River basin, with high incidence from Yakima, Benton, and Franklin counties, and present in Oregon around Hood River.
For Western X Questions and Answers new from WSU visit http://treefruit.wsu.edu/article/western-x-questions-and-answers-what-do-we-know-what-do-we-not-know/
For management recommendations for Little Cherry Virus and Western X including the latest sampling recommendations and recommendations for post-harvest leafhopper vector management. Visit
Thanks to the support of the WA Tree Fruit Research Commission, the Virus Diagnostic Laboratory at the Clean Plant Center Northwest, WSU-IAREC, is able to offer reduced cost testing for Little cherry virus-2 and the X-disease phytoplasma ($9.06 for one pathogen, $10.61 for both, per sample). We hope that this will encourage growers to get their trees tested, and help in the efforts to map the spread of this devastating disease. More information about Little cherry disease sample collection and submission can be found at: http://cpcnw.wsu.edu/lcdtests/
Ines Hanrahan and Marcella Galeni of the WA Tree Fruit Research Commission (WTFRC) recently published an article in "Fruit Matters" highlighting the development of a starch scale for WA38 production. Below are links to the story and to download the guide for use.
The WA Tree Fruit Research Commission recently was recognized as a finalist for "Non-Profit of the Year" by the Wenatchee Valley Chamber of Commerce. Each year, the Chamber holds a large banquet and highlights the finalizst for the Business of the Year, Non-Profit, and Cornerstone Award. Once notified of its finalist status, Voortex Productions visited the Commission and put together a brief video showcasing the COmmission's staff and its mission.
You can view this video by clicking on the YouTube link below.
There are no upcoming events at this time.
The latest edition of "Fruit Matters", is now available. This monthly newsletter is a product of the Tree Fruit Extension team which is comprised of members from WSU and the Washington Tree Fruit Research Commission whose goal is to share timely information with the tree fruit community.