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Resources for Little Cherry and X-disease Scouting and Sampling 2023

Little Cherry Virus 1 (LChV1), Little Cherry Virus 2 (LChV2) and X-disease phytoplasma (‘Candidatus Phytoplasma pruni’) cause small and poor color cherries. Visual symptoms are only seen on mature fruit 1-2 weeks before harvest. Timely scouting, testing and aggressive tree removal are critical to reduce the spread of the disease. Multiple resources are available for scouting and sampling of X-disease and Little Cherry disease during the 2023 season.

X-disease and Little Cherry Virus Scouting and Sampling Guide

New App in English/Spanish for Little Cherry and X-disease Symptom and Insect Scouting

To download the App search for ‘Little Cherry Scouting Guide’ in your App store. Or for an apple version click here or for Android version click here.

Symptoms Gallery

Vector Gallery

Symptoms and Sampling Videos

Symptoms of Little Cherry Virus and X-Disease Phytoplasma

Symptoms of X-Disease Phytoplasma in Stone Fruit

Where to send samples

Labs with current proficiency tests 

Additional Resource Pages

X-disease phytoplasma (Western X) 

Little Cherry Virus

Grape Mealybug

Apple Mealybug

BMPs for tree removal for X disease and Little Cherry Virus infected trees

Nursery Prevention of X-disease Phytoplasma and Little Cherry Virus Recommendations 

Cherry Prunus spp. X-Disease

Resources in Spanish

Fitoplasma X (Western X) Harper, Northfield, Nottingham, DuPont. Traducido Bernardita Sallato, April 2021   

Virus de la Cereza pequeña (LChV) Harper, Bixby Brosi, Beers, DuPont. Traducido Bernardita Sallato, April 2021

Enfermedad de la cereza pequeña en cerezos. Video. B. Sallato.

X-disease and Little Cherry Virus Scouting and Sampling Guide* 

Síntomas de Fitoplasma X y Little Cherry Virus. DuPont, S.T., Harper, S., Wright, A., Bishop, G. June, 2020.

Síntomas de Fitoplasma X en Frutas de Hueso. Naranjo, R., Molnar, C., DuPont, S.T., Harper, S. Oct, 2020.


Corina Serban, WSU Extension (509) 574-1595

Tianna Dupont, WSU Extension (509) 293-8758

Bernardita Sallato, WSU Extension (509) 439-8542

Ashley Thomson, OSU Extension (541) 296-5494


Fruit Matters articles may only be republished with prior author permission © Washington State University. Reprint articles with permission must include: Originally published by Washington State Tree Fruit Extension Fruit Matters at and a link to the original article.

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