Laboratory Analysis
The document below is a listing of many of the commercial labs for agricultural testing in California:
Selected commercial labs in Northern and Central California
Grapevine Virus Testing at UC Davis
Foundation Plant Services at UC Davis offers comprehensive virus testing services:
http://fps.ucdavis.edu/custompcr.cfm
The Real-Time PCR Research and Diagnostics Core Facility at UC Davis also offers virus testing:
http://www.vetmed.ucdavis.edu/vme/taqmanservice/plant_diagnostics.html
This article describes the basics of testing grapevines for virus diseases:
Laboratory testing for grapevine diseases article
Grape Variety Identification by DNA Testing
Foundation Plant Services can identify many grape varieties with DNA testing: