Location: Horticultural Crops ResearchTitle: Red blotch disease update
|HILTON, RICHARD - Oregon State University|
|KC, ACHALA - Oregon State University|
|LEVIN, ALEXANDER - Oregon State University|
|OSBORNE, JAMES - Oregon State University|
|QIAN, MICHAEL - Oregon State University|
|SKINKIS, PATRICIA - Oregon State University|
|TOMASINO, ELIZABETH - Oregon State University|
|WALTON, VAUGHN - Oregon State University|
Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: 4/15/2019
Publication Date: 4/25/2019
Citation: Martin, R.R., Hilton, R., KC, A., Lee, J.C., Lee, J., Levin, A., Osborne, J., Qian, M., Skinkis, P., Tomasino, E., Walton, V. 2019. Red blotch disease update. Meeting abstract for Oregon State University Grape Day on April 3, 2019 in Corvallis, OR.
Technical Abstract: There is ongoing grapevine red blotch virus (GRBV) research coordinated by members of the Oregon Wine Research Institute that focuses on virus vectors identification and distribution, transmission, non-crop hosts, vineyard management to mitigate disease symptoms, identifying virus impact on wine quality, and winery management. This research has been in progress since 2013, but efforts increased in 2018 due to funding from Domaine Serene Winery (Dundee, OR). There are two areas of emphasis in vector research, including studies with Oregon treehoppers species due to their close relationship to the confirmed vector in California studies, the Three Cornered Alfalfa Hopper. Treehopper life cycle and feeding behavior in alternate host plants, and damage to grapevines was studied. The second approach investigates the potential of other insect species from within infected vineyards (vine canopy, vineyard floor, and surrounding vegetation) to see if they can transmit the virus under controlled conditions by feeding collected insects on infected plants. Also, confirmed virus-free potted grapevines were placed in vineyards with high levels of GRBV during two growing seasons at monthly intervals to identify when virus is transmitted in the field. In efforts to mitigate the impact of GRBV in the vineyard, several management studies are underway, including irrigation, nutrition, and crop level management, timing and intensity of leaf pulling, and foliar applications of abscisic acid (ABA). Also, detailed physiological measurements of vine water stress and photosynthetic activity is being monitored throughout the growing season. The enology research group is doing basic fruit analysis before making wines and then characterizing the aroma and phenolic compounds in wines made from the vineyard management trials. Similar research teams are in progress with virus, vector, and management studies between USDA-ARS and institutions on the West Coast (UC-Davis, Oregon State University, Washington State University) and East coast (Cornell University).