On October 1, 2025, the California Department of Food and Agriculture (CDFA) established a new quarantine and designated quarantine areas for Citrus Yellow Vein Clearing Virus (CYVCV). CYVCV was first detected in the U.S. in April 2022 on a residential property in Tulare, California, and has since been found only on residential trees in Tulare and Visalia in Tulare County, and Hacienda Heights in Los Angeles County. No commercial citrus groves or nurseries are currently included in the quarantine areas.
The new CYVCV quarantine requirements are designed to prevent the spread of the virus by ensuring citrus fruit and trees are shipped free of CYVCV insect vectors. These regulations closely follow those of the Asian citrus psyllid quarantine to minimize disruption to citrus industry operations.
CYVCV is an emerging disease spread mechanically and by aphids and whiteflies. Symptoms include water-soaked leaves, yellow or clear veins, and wrinkled or distorted foliage. In severe cases, infected trees can die back and produce misshapen fruit. While other countries have reported economic losses from CYVCV, California has not yet seen any economic impacts. Because detections in the U.S. are limited to California, CDFA continues to conduct research and surveys to understand the disease and its effects better.
CCM staff will continue to monitor the situation and keep the industry updated on any developments. If you have questions about the regulations, please contact Keith Okasaki at Keith.Okasaki@cdfa.ca.gov or (916) 274-6300.
For quarantine boundaries and requirements, click here.
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