Thank you for visiting the Washington Tree Fruit Research Commission’s website. We support applied science to improve the financial and ecological sustainability of Washington’s tree fruit industry through innovative horticulture, pest and disease management, postharvest programs, and development of new technologies which efficiently deliver premium quality fruit to consumers.
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 2017 study in cherry which included 14 insecticides/acaricides, 6 fungicides, and a potash & phosphite foliar fertilizer. 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.
2016 WTFRC Apple Residue Study
2015 WTFRC Apple Residue Study
2011-2014 WTFRC Apple Residue Summary
2014 WTFRC Apple Residue Study
2013 WTFRC Apple Residue Study
2012 WTFRC Apple Residue Study
2011 WTFRC Apple Residue Study
2017 WTFRC Cherry Residue Study
2016 WTFRC Cherry Residue Study
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
Below is a list of industry events of note for the month of August.
August 17: Taiwan Orchard Bin Sampling
10:00 am - 12:00 pm Free
This training covers all the requirements for cutters and field staff to evaluate apples for export to Taiwan. Requirements for China export will also be covered. Training for Taiwan cutters is required every other year.
However, annual refreshers are recommended by WSDA.
Please try to register at least 24 hrs in advance of the session.
August 25: 2017 Rootstock Tour
Join WSU Extension and the Washington Tree Fruit Research Commission for a tour of recent rootstock trials. There are three stops on this tour. Join us at one or all.
Tom Auvil from North American Plants will describe characteristics of rootstock performance in the trials to date. For complete details, click on the brochure below
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.