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ARS Home » Pacific West Area » Parlier, California » San Joaquin Valley Agricultural Sciences Center » Crop Diseases, Pests and Genetics Research » Research » Publications at this Location » Publication #424973
Research Project: Identifying Vulnerabilities in Vector-host-pathogen Interactions of Grapevine and Citrus Pathosystems to Advance Sustainable Management Strategies

Location: Crop Diseases, Pests and Genetics Research

Title: Citrus yellow vein clearing virus in California: origin and transmission

Author
item SUN, YONGDUO - University Of Georgia
item Helm-Rodriguez, Sydney
item HAJERI, SUBHAS - Alliance Of Pest Control Districts
item Yokomi, Raymond

Submitted to: American Phytopathological Society Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 5/7/2025
Publication Date: N/A
Citation: N/A

Interpretive Summary:

Technical Abstract: Citrus yellow vein clearing virus (CYVCV), is known to cause yield and growth reductions in citrus and is an emerging concern in California. This research aimed to elucidate the global spread and local transmission dynamics of CYVCV in California. Spatiotemporal phylogenetic analysis, based on genome sequencing, traced the virus origin to approximately 1990 in South Asia and/or the Middle East, corroborating the initial report from Pakistan in 1988. Notably, California CYVCV isolates demonstrated diverse origins: Tulare isolates were associated with South Asian (India, Pakistan) and Middle Eastern (Türkiye) sources, while Hacienda Heights isolates were linked to East Asia (China, South Korea). Despite testing several reported insect vectors (Myzus persicae, Dialeurodes citri, Aphis gossypii, A. spiraecola) on various hosts, including citrus and herbaceous plants (common bean and cowpea), no vector transmission was observed for CYVCV CA isolates. A recent survey of Tulare citrus trees revealed c. 26% CYVCV-positive trees co-infected with non-insect-vectored citrus viroids (Citrus exocortis viroid and Hop stunt viroid), suggesting a significant role for infected budwood in local dissemination. These results provide a distinct understanding of CYVCV transmission in California, contrasting with findings from other regions, and offer crucial insights for targeted control measures.