Renewal Progress Report for CDFA Agreement Number 15-0428-SA “Searching for Potential Vectors of Grapevine Red Blotch-Associated Virus” Principal Investigator:

Interim Progress Report for CDFA Agreement Number #16-0512-SA Title of Project: Greenhouse evaluation of grapevine microbial endophytes and fungal natural products for control of Pierce's Disease Principal Investigator

Introduction Xylella fastidiosa (Xf) is a Gram negative, xylem-limited, insect-vectored bacterium and is the causal agent of Pierce's Disease (PD) of grapevine (Hopkins and Purcell 2002). PD is endemic to California but the recent introduction of a more effective vector, the Glassy-Winged SharpShooter (GWSS), Homalodisca vitripennis, to Southern California shifted the epidemiology of PD from a ...

The Development of a Quantitative Assay for the Detection of Grapevine Red Blotch-associated Virus in Vitis vinifera Identifies Significant Differences in Virus Distribution

BIOLOGY AND SPREAD OF GRAPEVINE RED BLOTCH-ASSOCIATED VIRUS Principal Investigator: Co-Principal Investigator: Collaborator:

Grapevine red blotch-associated virus (GRBaV) was isolated from table and wine grapes, as well as rootstocks, affected by red blotch, a recently recognized viral disease. Phylogenetic analyses revealed the clustering of GRBaV isolates two groups (clades) of genetic variants (Krenz et al., 2014, Al Rwahnih et al., 2015). Producing and using a full-length infectious clone of a representative isol...

Interim Progress Report for CDFA Agreement Number 12-0116-SA Title of Project Blocking Xylella fastidiosa transmission Principal Investigator

The goal of this project is to develop a technology to block the vector transmission of Xylella fastidiosa to plants. The approach focuses on the disruption of X. fastidiosa-vector interactions, so that the transmission of X. fastidiosa from one plant to another is affected. Our work has demonstrated that this approach is feasible and that we can disrupt sharpshooter transmission of X. fastidio...

Elisa detection of grapevine fleck virus ( GFkV )

Résumé — Détection par Elisa du virus de la marbrure de la vigne (GFkV = grapevine fleck virus). L’association du Grapevine fleck virus (GFkV) avec les symptômes de la marbrure de la vigne a été établie par Elisa. La détection par Elisa du GFkV dans les plants de vigne n’est pas possible pendant la totalité du cycle végétatif : dans nos conditions, en Alsace, les mois de juin et juillet c...