Author
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Martin, Robert |
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Submitted to: Meeting Abstract
Publication Type: Abstract Only Publication Acceptance Date: 5/28/2017 Publication Date: 9/11/2017 Citation: Martin, R.R. 2017. Timing of red blotch field transmission in Oregon. Meeting Abstract. Abstract for Grapevine Red Blotch Virus meeting, 2017 May 9-10, Davis, CA. Interpretive Summary: Technical Abstract: The objectives of this research were to determine when Grapevine red blotch virus (GRBV) is spreading in vineyards and identify the time of the growing season when vector control should be implemented in GRBV positive vineyards. Trap plants were placed in multiple vineyards at monthly intervals during the growing season and treated with systemic insecticide after vineyard exposure. The plants were then held in a screen house and tested for GRBV at the end of the growing season and the following spring and fall. While trap plants were in the vineyard insect populations were also monitored. Thus far, all tests have been negative. Testing will continue on trap plants from 2016 and 2017 and the placement of more trap plants will continue through 2018. One vineyard location had red leaf plants that that were subjected to next-generation sequencing which found: Grapevine fleck virus, GRBV, Grapevine leafroll-associated virus 2, Grapevine rupestris stem pitting-associated virus, Grapevine Syrah virus 1, Grapevine yellow speckle viroid, and Hop stunt viroid. Interestingly, in a winetasting of Pinot Noir from Willamette Valley comparing wines made from fruit with GRBV-infected vines and healthy vines from the same clone/rootstock combination, only two of eight people can differentiate the wines and side-by-side tasting. |