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Labs testing for Little Cherry Virus and X-disease Phytoplasma

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Labs with current proficiency tests

In order to help the industry manage X-disease and Little cherry disease WSU is providing support for commercial labs including updated protocols, positive controls, training where possible and proficiency testing. For more information and results for previous proficiency tests Proficiency testing results history (2021.07.01)
All participating labs generally have a 1-2 week turn around time currently. We will list here when there is a backup to help even out the flow of samples. Please check before you send.

The Oregon State University Plant Clinic

can test for both Little cherry virus 1 and 2, as well as X disease (Western X). For information, please visit their web site at A list of services and fees are available at the “Submit a sample” pull down menu.

AGNEMA 1320 E Spokane St, Suite A Pasco, Washington 99301 509-255-3744 Choose forms > Little Cherry Disease sample submission form

Agdia Inc.

52642 County Road 1 Elkhart, IN 46514

AL&L Crop Solutions, Inc.

7769 N. Meridian Rd. Vacaville, CA 95688

Eurofins Cascade Analytical

1008 W. Ahtanum Rd. Union Gap, WA 98903. (509) 452-7707 For courier service and additional drop locations visit Fruit Tree Disease Diagnostics Sample Submission Form (pdf) (

IEH Cashmere

201 S Division St, Cashmere, WA 98815 Phone: (509) 782-1500 Attn. Christine Bender (


1615 NE Eastgate Blvd Section D Suite 3 Pullman WA 99163
If you are a lab that would like to do X-disease phytoplasma and Little cherry virus testing we are happy to provide the same support for all labs. Download Recommended Protocols Download letter with details and Proficiency testing protocols (2020.12.19). Proficiency testing for 2021 is planned for February, April and June. Samples are planned to be distributed to interested labs Feb 1, April 1 and June 7, 2021. Samples results should be returned to WSU for analysis and posting Feb 15, April 15 and June 21.

Washington State University