Source: AGRICULTURAL RESEARCH SERVICE submitted to NRP
BIOLOGY AND SPREAD OF GRAPEVINE RED BLOTCH-ASSOCIATED VIRUS
Sponsoring Institution
Agricultural Research Service/USDA
Project Status
ACTIVE
Funding Source
USDA INHOUSE
Reporting Frequency
Annual
Accession No.
0425882
Grant No.
(N/A)
Cumulative Award Amt.
(N/A)
Proposal No.
(N/A)
Multistate No.
(N/A)
Project Start Date
Apr 15, 2013
Project End Date
Apr 14, 2015
Grant Year
(N/A)
Program Code
[(N/A)]- (N/A)
Recipient Organization
AGRICULTURAL RESEARCH SERVICE
800 BUCHANAN ST, RM 2020
BERKELEY,CA 94710-1105
Performing Department
(N/A)
Non Technical Summary
(N/A)
Animal Health Component
30%
Research Effort Categories
Basic
70%
Applied
30%
Developmental
0%
Classification

Knowledge Area (KA)Subject of Investigation (SOI)Field of Science (FOS)Percent
21211311160100%
Knowledge Area
212 - Pathogens and Nematodes Affecting Plants;

Subject Of Investigation
1131 - Wine grapes;

Field Of Science
1160 - Pathology;
Goals / Objectives
1)Investigate the role of Grapevine red blotch-associated virus in red blotch disease. 2)Monitor the spread of Grapevine red blotch-associated virus in selected vineyards. 3)Determine the population structure and genetic variability of Grapevine red blotch-associated virus to optimized diagnostics. 4)Disseminate research results to farm advisors and the industry.
Project Methods
1)Using Cabernet Sauvignon vines that were graft inoculated with GRBaV-infected material in 2011, determine if symptoms develop and how long it takes for symptoms to manifest. Plants will be visually observed at two-week intervals for symptoms developments and at monthly-intervals for virus detection. Data will be collected and interpreted to determine if GRBaV is the etiological agent of red blotch disease. 2)Monitor the incidence of GRBaV in a newly established vineyard adjacent to a GRBaV-infected vineyard to verify if horizontal spread of the virus is able to occur. 3)Test a set of 50 additional GRBaV isolates from varied cultivars and geographic origin to gain a better insight into the genetic variability of GRBaV. New primers will be validated with a collection of GRBaV-infected vines from different cultivars and geographic origin. 4)Progress will be communicated to industry via various avenues.