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ARS Home » Pacific West Area » Corvallis, Oregon » Horticultural Crops Production and Genetic Improvement Research Unit » Research » Publications at this Location » Publication #382878
Research Project: Improved Fruit, Grape and Wine Products through Precision Agriculture and Quality Component Evaluation

Location: Horticultural Crops Production and Genetic Improvement Research Unit

Title: First report of grapevine rupestris vein feathering virus in wine grapes in Idaho

Author
item DAHAN, JENNIFER - University Of Idaho
item THOMPSON, BRANDON - University Of Idaho
item Lee, Jungmin
item KARASEV, ALEXANDER - University Of Idaho

Submitted to: Plant Disease
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 4/29/2021
Publication Date: 11/23/2021
Citation: Dahan, J., Thompson, B.D., Lee, J., Karasev, A.V. 2021. First report of grapevine rupestris vein feathering virus in wine grapes in Idaho. Plant Disease. 105(10):3309. https://doi.org/10.1094/PDIS-04-21-0728-PDN.
DOI: https://doi.org/10.1094/PDIS-04-21-0728-PDN

Interpretive Summary: This paper is the first report on the presence of GRVFV (Grapevine rupestris vein feathering virus) in Idaho commercial vineyards. GRVFV is associated with chlorotic discolorations (yellowing) of leaf veins or with Syrah decline (decreasing grape yield). Based on its unique genome, this Idaho GRVFV (GRVFV-ID) did not originate from the neighboring state of Washington. Though Idaho’s wine grape industry is fairly young in comparison to the prominent US growing regions of California, Washington, Oregon, and New York, grapevine viruses are a concern in all viticulture regions. While some grapevine viruses are detrimental to grapevine health, crop load ratio, fruit characteristics, and ultimately to wine quality, others cause only minor issues.

Technical Abstract: Wine grape production in Idaho occurs on approximately 1,300 acres (planted acreage), predominately in Canyon County in the Southwest and Nez Perce County in the Northwest. Grapevine virus screening in these two counties has been ongoing for several years, and we have discovered a GRVFV (Grapevine rupestris vein feathering virus) that is unique to Idaho (GRVFV-ID) for the first time. GRVFV is associated with chlorotic discolorations of leaf veins and with Syrah decline. Leaf and petiole samples from grapevines were collected based on visual signs of leaf reddening, leaf rolling, and chlorosis, and then tested by RT-PCR (reverse transcription polymerase chain reaction) using GRVFV-specific primers (GRVFV-F1, 5’-GAAGCAACAGTGCCCGTCTC -3’ and GRVFV-R1, 5’-AGGTCGCTTTACGGACCTTTTCTT -3’). GRVFV was found in three Idaho vineyards, all from the cultivar Chardonnay. Again, this is the first report on the presence of GRVFV within Idaho commercial vineyards.