Agri-Analysis :: Grapevine Testing :: Seed Testing since 1981.

You are here: To better serve you, Agri-Analysis is now located in Davis within walking distance to UCD campus.
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Testing for:
Lettuce Mosaic Virus Bacterial diseases Grapevine diseases Fungal diseases Seed Health Genetic Traits GMOs

Our New Location:
950 West Chiles Road
Davis, CA 95618


Agri-Analysis LLC is a proud member of:

The Napa Valley Grape Growers Association

The California Seed Association

The American Phytopathological Society

Grapevine Red Blotch Virus Discovered

During the 17th scientific meeting of the International Council for the Study of Virus and Virus-Like Diseases of the Grapevine (ICVG) held at UC Davis, October 7-14, 2012, scientists from Cornell and UC Davis reported the discovery of a new grapevine virus. Dr. Keith Perry, Department of Plant Pathology of Cornell Univeristy, reported a new circular DNA virus from grapevine which is named "Grapevine cabernet franc-associated virus (GCFaV)". Dr. Mysore Sudarshana, USDA-ARS, Department of Plant Pathology of UC Davis reported a circular DNA virus in grapevines affected by red blotch diseases. They named this virus "Grapevine red blotch-associated virus (GRBaV)". It is believed that GCFaV and GRBaV are the same virus that belongs to the family of Geminiviridae. Noteworthy is the fact that it is a circular DNA virus composed of 3,206 nucleotides as opposed to linear RNA viruses which make up the majority of the grapevine virodom. For more information, please download the Grapevine Red Blotch Virus Brochure prepared by Agri-Analysis.

Commonly Tested Grapevine Viruses:

Spring Grapevine Virus Testing is in Season! Fall is the best time to test for grapevine leafroll-associated viruses and other grapevine viruses. Agri-Analysis uses the state-of-the-art technologies such as polymerase chain reaction (PCR) and the enzyme-linked immunoasorbent assay (ELISA) for the accurate detection of all grapevine viruses. Our Standard Vineguard Panel of assays detects the most significant and most commonly encountered viral and bacterial pathogens affecting grapevine production as listed below. Call us today for your virus testing needs.

  • Grapevine leafroll-associated virus type 1 (GLRaV-1)
  • Grapevine leafroll-associated virus type 2 (GLRaV-2)
  • Grapevine leafroll-associated virus type 3 (GLRaV-3)
  • Grapevine leafroll-associated virus type 4 (GLRaV-4)
  • Grapevine leafroll-associated virus type 5 (GLRaV-5)
  • Grapevine fanleaf virus (GFLV)
  • Grapevine virus B (GVB, corky bark associated virus)
  • Pierce's Disease (Xylella fastidiosa)
  • Grapevine Virus A (GVA)



Grapevine viruses are field-transmitted by pests from infected vines to healthy vines such as glassy-winged sharpshooters, nematodes, mealy bugs. Due to the wide presence of these pests in California vineyards, certified nursery stocks may not guarantee virus-free vineyards. Therefore, it is crucial for growers and management companies to regularly and consistently screen and survey their vineyards for the presence of common grapevine viruses to determine the extent of their spread and the health status of their vines. Agri-Analysis is proud to offer the "Vineyard Virus Survey Pays" program. Our scientists would work with your viticulturists and management team to develop a survey plan that inludes site selection, sampling density, time interval, data analysis, reporting method, information management, and survey costs. Our Extensive Vineguard Panel includes eighteen (18) grapevine viruses and other pathogens listed below. Please call us today for more information of our Vineyard Virus Survey Program.

  • Grapevine leafroll-associated virus type 1 (GLRaV-1)
  • Grapevine leafroll-associated virus type 2 (GLRaV-2)
  • Grapevine leafroll-associated virus type 3 (GLRaV-3)
  • Grapevine fanleaf virus (GFLV)
  • Grapevine virus B (GVB, corky bark associated virus)
  • Pierce's Disease (Xylella fastidiosa)
  • Grapevine leafroll-associated virus type 4 (GLRaV-4)
  • Grapevine leafroll-associated virus type 5 (GLRaV-5)
  • Grapevine leafroll-associated virus type 6 (GLRaV-6)
  • Grapevine leafroll-associated virus type 7 (GLRaV-7)
  • Grapevine leafroll-associated virus type 9 (GLRaV-9)
  • Grapevine fleck virus (GFkV)
  • Grapevine virus A (GVA)
  • Grapevine virus D (GVD)
  • Grapevine Rupestris stem-pitting associated virus (GRSPaV)
  • Grapevine Leafroll associated virus 2 Red Globe Strain (LR2-RG)
  • Grapevine syrah virus - 1 (GSyV-1)
  • Grapevine rupestris stem pitting associated virus syrah strain (GRSPaV-Syrah)


  • Phaeoacremonium aleophilum and other Phaeoacremonium spp.
  • Phaeomoniella chlamydospora
  • Cylindrocarpon spp.

Other Assays for Detectiing Important Grapevine Diseases:

  • Tomato ring spot virus (ToRSV), (Grapevine Yellow Vein Disease)
  • Arabis Mosaic Virus (ArMV)
  • Phytophthora spp.
  • Cylindrocarpon spp. (Black Foot Disease)
  • Armillaria mellea (Oak root fungus)
  • Eutypa spp. (Eutypa Dieback)
  • Botryosphaeria spp. (Bot canker)
  • Phomopsis viticola
  • Agrobacterium tumefaciens (Crown Gall Disease)
  • Phytoplasmas