Author
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Martin, Robert |
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PSCHEIDT, JAY - Oregon State University |
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Submitted to: Agriculture Handbook
Publication Type: Other Publication Acceptance Date: 12/22/2017 Publication Date: 2/2/2018 Citation: Martin, R.R., Pscheidt, J. 2018. Grape (Vitis spp.)- Virus diseases. Pacific Northwest Plant Disease Handbook. Interpretive Summary: Technical Abstract: In the Pacific Northwest (PNW)there are a few important viruses of grapevines, three of the nematode transmitted viruses (Tobacco ringspot virus and Tomato ringspot virus) have been reported, but in only a few vineyards and the vector for these viruses is widespread in vineyards in the PNW. Grapevine fanleaf has also been reported but in very few vineyards and the vector has not been detected in the PNW. Grapevine leafroll viruses have been reported throughout the PNW and these are transmitted by mealybugs and soft scale insects. These viruses are important in the warm and dry growing areas in the PNW. The other important virus is the recently discovered Grapevine red blotch virus which has been detected in all growing areas of the PNW, the vector is unknown. However, this virus does appear to spread in some vineyards. The most important control measure for viruses is to start with clean plants, this includes scions and rootstocks. For the nematode transmitted viruses, preplant assessment of the site is important to understand the risk of nematode vectors in the soil. For the Grapevine leafroll viruses, vector control is important in areas where the virus is present, if there is not any virus near your vineyard vector control should not be necessary. For Grapevine red blotch virus, monitor for symptoms, get suspect plants tested and removal of infected plants before the virus becomes widespread can greatly slow the virus movement in a vineyard. |
