Newsletters

Newsletter Archive

2018

• Fall Articles

  • New Field Trials Planted in Northern California

  • Update on Traditional Breeding of PD Resistance into Winegrapes

  • Functional Characterization of pilG, a Key Virulence Gene, and Evaluation of the Effects of Anti-Virulence Inhibitors on the Virulence of Xylella fastidiosa

  • Resistance to Grapevine Fanleaf Virus in Rootstocks

  • Timing of Field Transmission of Grapevine Red Blotch Virus

  • 2018 Pierce's Disease Research Symposium

• Summer Articles

  • PD/GWSS Board Funds 15 Research Projects

  • A Few Past and Current Research Projects

  • Mapping Pierce's Disease and Vector Populations in the Southern San Joaquin Valley and Developing a Dynamic Model to Assess Management Strategies

  • Quantifying Vine Mealybug Spatio-Temporal Dynamics: Assessing Invasion Risk to Refine Management Strategies

  • A Study on the Impact of Individual and Mixed Leafroll Infections on the Metabolism of Ripening Wingrape Berries

  • Cooperative Nursery Program is Key to Preventing the Spread of GWSS

• Spring Articles​

  • Foundation Plant Services Stepping Up Testing After Red Blotch Find

  • CDFA Statewide Survey and Detection Gears Up

  • Greenhouse Evaluation of Grapevine Microbial Endophytes and Fungal Natural Products for Control of PD

  • Insecticide Resistance in the Glassy-winged Sharpshooter: Using Historical Use Patterns to Inform Future Management Strategies

  • Assessing Effects of Seasonality on the Epidemiology of PD in the Southern San Joaquin Valley

  • New Officers for the PD/GWSS Board

• Winter Articles​

  • GWSS Area-Wide Program Update: Kern and Tulare Counties

  • Santa Clara County Free of GWSS for the First Time in 17 Years

  • Evaluating Potential Shifts in Pierce’s Disease Epidemiology

  • A Study on the Impact of Individual and Mixed Leafroll Infections on the Metabolism of Ripening Wingrape Berries

  • Quantifying Vine Mealybug Spatio-Temporal Dynamics: Assessing Invasion Risk to Refine Management Strategies

  • 2017 Pierce's Disease Research Progress Reports Available Online
     

2017

• Fall Articles

  • Isolated GWSS Finds Show Importance of Ongoing Vigilance

  • New Videos Added to the PD/GWSS Board Channel

  • High Throughput Live Cell Screen of Small Molecules Targeting the ToIC Efflux Pump of Xylella fastidiosa

  • Timing of Field Transmission of Grapevine Red Blotch-Associated Virus

  • Molecular Breeding Support for the Development of Pierce's Disease- Resistant Winegrapes

  • Governor Brown Signs State Budget With $5 Million Designated for PD Control Program

• Summer Articles

  • UC Davis Announces Pre-Release of Five New PD-Resistant Winegrape Cultivars

  • Researchers Gather to Find Solutions To Grapevine Viruses

  • Monitoring for Insecticide Resistance in the GWSS in California

  • The Riverside County GWSS Program in the Temecula Valley

  • Biology and Spread of Grapevine Red Blotch-Associated Virus

  • Proper Training Key to Success of the ATP Program

• Spring Articles

  • Modified Rootstocks Could Help Prevent PD

  • The Key to Stopping New GWSS Infestations in Uninfested Areas

  • Monitoring Glassy-Winged Sharpshooters and Pierce's Disease In Kern County, California

  • Searching for Potential Vectors of Grapevine Red Blotch-Associated Virus

  • Development of a Biological Control for Pierce's Disease

  • CDFA PD Control Program Nursery Stats for 2016

• Winter Articles​

  • Determining What 'Certified Plant Material' Means to Growers

  • New Logo for the PD/GWSS Board

  • Evaluation of Commercial Ant Baits as a Component of an Integrated Pest Management Program for Vine Mealybug

  • Assessing Pierce's Disease Spread in Grape Lines With Novel Defensive Traits

  • Management of Insecticide Resistance in Glassy-Winged Sharpshooter Populations Using Toxicological, Biochemical and Genomic Tools

  • From Phages to Mealybugs - There Was Much to Discuss During the 2016 PD Research Symposium 

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2016

• Fall Articles

  • North Coast PD Study Underway

  • EGVM Eradicated from California

  • Evaluation of Natural Products Isolated from Grapevine Fungal Endophytes for Control of PD

  • Brown Marmorated Stink Bug Risk and Impacts in Western Vineyards

  • Evaluation of Commercial Ant Baits as a Component of an Integrated Pest Management Program for Vine Mealybug

  • 2016 Pierce's Disease Research Symposium to Be Held in San Diego

• Summer Articles

  • PD/GWSS Board Gets a Taste of Wine Made From PD-Resistant Grapevines

  • PD Board Funding for PD and Other Research Projects

  • Transgenic Rootstock-Mediated Protection of Grapevine Scions by Single and Stacked DNA Constructs

  • Continued Field Evaluation of Diffusible Signal Factor Inducing Grape for Control of Pierce's Disease

  • Selective Disruption of Glassy-winged Sharpshooter Maturation and Reproduction by RNA Interference

  • State Bill Introduced to Boost Funding for PD Control Program

• Spring Articles

  • Recently Identified Enzyme May Hold New Insight into Pierce's Disease Grapevine Damage

  • GWSS Eggs Found on Nursery Shipments in Napa and Sonoma

  • Substrate-Borne Vibrational Signals in Intraspecific Communication of the Glassy-winged Sharpshooter

  • Field Evaluation of Grape Plants Expression Potential Protective DNA Sequences Effective Against Pierce's Disease

  • Biological Control of Pierce's Disease of Grapevines in the UC Riverside Vineyard With a Benign Strain of Xylella fastidiosa

  • Nursery Rejections Down in 2015 - Plant Inspections are Working

• Winter Articles

  • What Winegrape Growers Should Know About Red Blotch

  • PD-Resistant Vines Becoming a First Line of Defense Against PD

  • The Riverside County Glassy-winged Sharpshooter Program in the Temecula Valley

  • Whole Genome Sequence Analyses of Xylella fastidiosa Pierce's Disease Strains From Different Geographical Regions

  • Characterization of Different California Strains of Xylella fastidiosa by Fatty Acid Methyl Ester Analysis

2015

• Fall Articles

  • European Grapevine Moth Update

  • PD/GWSS Board Travels to Bakersfield - Concerned About Increases in PD

  • Blocking Xylella fastidiosa Transmission

  • Map-Based Identification and Positional Cloning of Xylella fastidiosa Resistant Genes from Known Souces of Pierce's Disease Resistance in Grapes

  • Management of Insecticide Resistance in Glassy-Winged Sharpshooter Populations Using Toxicological, Biochemical and Genomic Tools

  • Researchers Determined to Discover Why Growers Are Seeing More PD

• Summer Articles

  • Pierce's Disease - The Big Picture

  • PD/GWSS Board Recommends Funding Eleven Research Projects

  • Vector Inoculation of Xylella fastidiosa: New Evidence Suggests Sharpshooters Can Be "Flying Syringes"

  • Defining the Role of Secreted Virulence Proteins LesA and PrtA in the Pathobiology of Xylella and in the Development of Pierce's Disease

  • Elucidating the Process of Cell-Cell Communication in Xylella fastidiosa to Achieve Pierce's Disease Control by Pathogen Confusion

  • It's Official - PD/GWSS Referendum Passes

• Spring Articles

  • Breaking the GWSS Sound Barrier

  • Tasting the Future

  • Identification of a New Virulence Factor Required for Pierce's Disease and Its Utility in Development of a Biological Control

  • Role of Cold Shock Proteins in Xylella fastidiosa Virulence

  • Transgenic Rootstock-Mediated Protection of Grapevine Scions by Dual Stacked DNA Constructs

  • Is the PD/GWSS Referendum Over Yet?

• Winter Articles

  • Is There an Insect Vector for Red Blotch?

  • Researchers Present Their Work at the PD Research Symposium

  • Substrate-Borne Vibrational Signals in Intraspecific Communication of the Glassy-Winged Sharpshooter

  • Elucidating the Process of Cell-to-Cell Communication in Xylella fastidiosa to Achieve Pierce's Disease Control by Pathogen Confusion

  • Monitoring for Insecticide Resistance in the Glassy-Winged Sharpshooter in California

  • The Vote Is Coming! The Vote Is Coming!
     

2014

• Fall Articles

  • Governor Signs PD/GWSS Bill

  • Long-Time PD Researcher Bruce Kirkpatrick Retires

  • Scientists Decipher Stink Bug Aggregation Pheromone

  • Anterior Foregut Microbiota of the GWSS Explored Using Deep 16S rRNA Gene Sequencing From Individual Insects

  • Identification of a New Virulence Factor Required for Pierce's Disease and Its Utility in Development of a Biological Control

  • Characterization of Xf Genes Required for Pathogenicity

  • Tastings of Wine Made From PD-Resistant Winegrapes

• Summer Articles​

  • PD/GWSS Board Designates Two Pests and One Disease as Threats to California's Vineyards

  • New and Continuing Research Projects Get Funded

  • Some Facts on PD/GWSS Board's Newly Designated Disease & Pests

  • The Riverside County Glassy-winged Sharpshooter Program in the Temecula Valley

  • Rootstock Effects on the Progression of PD Symptom Development and Possible Mechanisms

  • Optimizing Grape Rootstock Production and Export of Inhibitors of Xf Polygalacturonase Activity

  • Inspectors Find GWSS Eggs in Nursery Shipments

• Spring Articles

  • Update on Field Trials of PD-Resistant Grapevines

  • Pierce's Disease Legislation Introduced

  • Board Hires Researcher Liaison to Advise on Research Activities

  • Molecular and Functional Characterization of the Putative Xylella fastidiosa Resistance Gene(s) From Vitis arizonica

  • Greenhouse Evaluation of Grapevine Fungal Endophytes and Fungal Natural Products Antagonistic to Xylella fastidiosa for Control of PD

  • Suitability of Fertilized and Unfertilized Eggs of the Glassy-winged Sharpshooter for the Egg Parasitoid Gonatocerus morrilli

  • Keeping GWSS Out of Your Vineyards

• Winter Articles

  • Research Breakthroughs Reported During 2013 PD Research Symposium

  • The Eradication of GWSS in SLO County

  • Virulent Phages of Xylella fastidiosa: Phophylactic and Therapeutic Evaluation

  • Blocking Xylella fastidiosa Transmission

  • Continued Field Evaluation of Grapevines Producing Diffusible Signal Factor for Control of PD

  • Getting Solutions to PD from the Lab to Growers​
     

2013

• Fall Articles

  • PD-Resistant Winegrapes Get Tested in the Eye of the Storm

  • GWSS Area-Wide Treatment Program Update: Kern and Tulare Counties

  • Final Report - Enhancing Control of Pierce's Disease by Augmenting Pathogen Signal Molecules

  • Final Report - Vouchering Specimens of Egg Parasitoids of the GWSS Collected by the CDFA Pierce's Disease Biological Control Program in California and Texas A&M in Texas

  • Biological Control of Pierce's Disease of Grapevine with EB92-1, a Benign Strain of Xylella fastidiosa

  • Vineyard Tour and Wine Tasting with Dr. Andy Walker

• Summer Articles

  • Out of Nowhere Comes Red Blotch

  • CDFA's PD Control Program Meeting the Changes and Challenges

  • New Video - Fighting the GWSS Infestation in Fresno

  • Development of a Grape Tissue Culture and Transformation Platform for the California Grape Research Community

  • UPDATE - Field Evaluation of Grafted Grapevine Lines Expressing Pear Polygalacturonase-Inhibiting Proteins

  • Identification and Utilization of Cold Temperature Induced Grapevine Metabolites to Manage Pierce's Disease

  • GWSS Nursery Subcommittee Helps Keep Industry Up-to-Date

• Spring Articles

  • Designating a Winegrape Pest or Disease Is a Deliberative Process

  • Fighting the GWSS Infestation in the City of Fresno

  • New Research Video Online

  • The Oxidative Stress Response: Identifying Proteins Critical for Xylella fastidiosa Survival in Grapevines

  • Genetic Mapping of Xylella Fastidiosa Resistant Genes in Grape Germplasm from the Southern United States

  • Field Evaluation of Grape Plants Expressing PR1 and UT456 Transgenic DNA Sequences for Protection Against Pierce's Disease

  • 2012 Nursery Program Review

• Winter Articles

  • RSAP Helps to Guide Board's Research

  • EGVM Quarantine Area Reduced

  • GWSS Biological Control Update

  • Greenhouse Evaluation of Grapevine Fungal Endophytes and Fungal Natural Products Antagonistic to Xylella fastidiosa for Control of PD

  • Development and Use of a Recombinant Virus for Controlling GWSS

  • Blocking Xylella fastidiosa Transmission

  • Virginia Creeper Leafhopper is Latest Vineyard Pest to Invade California Vineyards

2012

• Fall Articles

  • Knowing Your Enemy is Half the Battle

  • PD Symposium to Take the Year Off

  • Are the Hormones of the Glassy-Winged Sharpshooter a Viable Insecticide Target?

  • Can Pierce's Disease Resistance from Vitis vinifera Be Transferred From a Resistant Rootstock to a Susceptible Scion?

  • Linking Within-Vineyard Sharpshooter Management to Pierce's Disease Spread

  • Wines from PD-Resistant Grapes Are Here for the Tasting

• Summer Articles

  • Strange Looking Plants Could Lead to Better Winegrape Vines

  • PD/GWSS Board Considers New Threats

  • Biological Control of Pierce's Disease (PD) of Grapevine with Benign Strains of Xylella fastidiosa - UPDATE

  • Report on Field Trials

  • Blocking Xylella fastidiosa Transmission

  • Budget Cuts and the PD Control Program

• Spring Articles

  • EGVM Quarantine Lifted in Four Counties

  • Nursery Training Key to Preventing Spread of GWSS

  • PD/GWSS Board Partners with UGMVE on Research RFP

  • Identification and Utilization of Cold Temperature Induced Grapevine Metabolites to Manage PD

  • Linking Within-Vineyard Sharpshooter Management to PD Spread

  • Development and Use of a Recombinant Coagulata Virus-1 for Controlling GWSS

  • What Role Do Ornamental Plants Play in Spreading PD to Your Vines?

  • New Video About Producing Parastic Wasps Online

• Winter Articles

  • Defeating the EGVM in Fresno a Combined Effort

  • The Never-Ending Battle Against GWSS

  • N-Acetyl-L-Cysteine, A New Perspective for Xylella Fastidiosa Control

  • Grape Rootstock Variety Influence on Pierce's Disease Symptoms

  • Effects of Plant Water Stress and Temperature on Glassy-Winged Sharpshooter Feeding in Relation to Transmission of Xylella Fastidiosa

  • Researchers Present Their Work at 2011 PD Symposium

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2011

• Fall Articles

  • Monitoring GWSS Numbers Very Important to Temecula's Grape Industry

  • GWSS Infestations Keep County Ag Commissioners on the Alert

  • Development of Effective Monitoring Techniques for Sharpshooters and their Parasitoids

  • Linking Within Vineyards Sharpshooter Management to Pierce's Disease Spread

  • Understanding the Dynamics of Neonicotinoid Insecticidal Activity Against the Glassy-Winged Sharpshooter: Development of Target Thresholds in Grapevines

  • PD Research Symposium Registration Opens

• Summer Articles

  • GWSS, EGVM - Whatever Comes Next - the Board is Ready

  • New Members for RSAP

  • Do Cell Wall Structures Limit Xylella Fastidiosa Distribution in Inoculated, PD Susceptible and Resistant Grapevines?

  • Linking Within-Vineyard Sharpshooter Management to Pierce's Disease Spread

  • Genomic Sequences of Biocontrol Strain EB92-1 and Identification of Elicitor(s) of Effective Defense in Winegrapes Against PD

  • New Research Videos Bring Field Trial Work to You

• Spring Articles

  • Efforts to Stop the Spread of GWSS Continue

  • San Luis Obispo County GWSS Update

  • What Grape Growers SHould Know About Home Winemaking and EGVM

  • Survey of Green Sharphshooter Populations in and Near Vineyards in the San Joaquin Valley

  • Robust One-Hour Genotyping of Xylella Fastidiosa Strains Using Fret Probes

  • Are Natural Enemies Controlling GWSS Populations in Southern California?

  • Joing Information Center Established for EGVM Control

• Winter Articles

  • Slow Season? What Slow Season?

  • 2010 Pierce's Disease Research Symposium

  • Survey of Green Sharphshooter Populations in and Near Vineyards in the San Joaquin Valley

  • Are Natural Enemies Controlling GWSS Populations in Southern California?

  • Robust One-Hour Genotyping of Xylella Fastidiosa Strains Using Fret Probes

  • Joint Information Center Established for EGVM Control

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2010

• Fall Articles

  • Two Million Wasps and Counting

  • PD/GWSS Board Passes First European Grapevine Moth Research Proposal

  • Exploiting Pathogen Signal Molecules for Control of Pierce's Disease

  • Testing of Signal Peptides and Anti-microbial Proteins for Rapid Clearance of Xf

  • Biological Control of Pierce's Disease with Benign Strains of Xf

  • PD Control Program Update

• Summer Articles

  • PD/GWSS Referendum Passes What's Next?

  • Field Trials Get Underway Around the State

  • Improved Detection, Monitoring and Management of the Glassy-Winged Sharpshooter

  • Development of Effective Monitoring Techniques for Sharpshooters and their Parasitoids

  • Understanding the Dynamics of Neonicotinoid Insecticidal Activity Against GWSS on Target Thresholds in Grapevines

  • Area-wide Control Program Update

• Spring Articles

  • 100 Days War

  • Rapid Response - Keeping GWSS in Check

  • Exploiting Pathogen Signal Molecules for Control of PD

  • Controlling Programmed Cell Death in Grapevines

  • Management of PD by Interfering with the Bacteria's Ability to Move within the Plant's Xylem Tissue

  • In-Plant Testing of Signal Peptides and Anti-Microbial Proteins for Rapid Clearance of Xylella Fastidiosa

  • Rapid Response - Keeping GWSS in Check

• Winter Articles

  • PD/GWSS Research - Getting Results

  • New Changes Allow Research and Outreach on Additional Winegrape Pests

  • Update Breeding Pierce's Disease Resistant Winegrapes

  • The Economics of Pierce's Disease

  • Grape Rootstock Variety Influence on Pierce's Disease Symptoms in Chardonnay

  • The Vote is Coming!

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2009

• Fall Articles

  • Eradicating GWSS in Foothill Farms

  • Fighting Pierce's Disease - Keys to Success

  • Seasonal Transmission of Xylella fastidiosa by the Glassy-Winged Sharpshooter from Grapevines Infected for Various Lengths of Time

  • Are Glassy-Winged Sharpshooter Populations Regulated in California?

  • Analysis of the Bacterial Community Associated with Sharpshooters, Insect Vectors of Xylella fastidiosa

  • Governor Signs SB 2, Extends PD Program

• Summer Articles

  • Why the Glassy-winged Sharpshooter Isn't Everywhere in California

  • 2009 PD Research Symposium

  • Board Votes for PD Assessment to Remain at $1

  • Enabling Technologies for Grape Transformation

  • The Economics of Pierce's Disease

  • Identifying Similarities and Differences Across the Three Leafhopper Vectors of Xylella Fastidiosa

• Spring Articles

  • What Form Will the Cure for Pierce's Disease Take?

  • Pierce's Disease - A Decade of Progress

  • Should Neoclassical Biological Control Agents from Argentina be Released in California for Control of GWSS?

  • Which Grape Varietals are Sources of PD Spread

  • Management of PD by Interfering with the Bacteria's Ability to Move Within the Plant's Xlem Tissue

  • Temecula - Ten Years Later

• Winter Articles

  • PD/GWSS Board Grower Funded - Grower Directed

  • 2008 Symposium Wrap-Up

  • Assessing the Post-Winter Threat of GWSS Populations

  • Control of Pierce's Disease by Methods Involving Pathogen Confusion

  • Age Determination and the Red Pigment in the Wings of GWSS

  • Does Severe Pruning Work?

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2008

• Fall Articles

  • This Won't Hurt a Bit!

  • "Best Winery in California," Thanks to PD/GWSS Board

  • The Benefits and Costs of Alternative Policies for the Management of Pierce's Disease

  • Functional Testing and Delivery of Pierce's Disease-Specific Promoters from Grape

  • Significance of Riparian Plants in the Epidemiology of Pierce's Disease

  • Pierce's Disease Control Program Update

• Summer Articles

  • Nursery Treatment Program to Stop GWSS Gets the Green Light

  • California Budget Woes and Pierce's Disease

  • What the Farm Bill Means to Growers

  • Genomic Sequencing, Discovery and Characterization of Viral Pathogens in the Glassy-winged Sharpshooter

  • Finding Pierce's Disease Infected Vines in Large Vineyards: A Proposed Pierce's Disease Sampling Program

  • Environmentally Created Immunity Against Pierce's Disease

  • 2008 Pierce's Disease Research Symposium

• Winter Articles

  • 7th Annual Research Symposium - New Results Stimulate New Ideas

  • RNA-Interference and Control of GWSS and Other Leafhopper Vectors of Pierce's Disease

  • Faster DNA Test Developed to Pinpoint Whether or Not Grapevines Carry Xylella Fastidiosa

  • Assessment of the Process of Movement of Xylella fastidiosa within Susceptible and Resistant Grape Varieties

  • Ed Weber Worked Closely with Napa Growers to Keep Pierce's Disease at Bay

​

2007

• Fall Articles

  • Joint Research Project Leads to PD/GWSS Management Method

  • Dispersal & Movement of the Glassy-Winged Sharshooper and Associated Natural Enemies in a Continuous, Deficit-Irrigated Agricultural Landscape

  • Design of Chimeric Anti-Microbial Proteins for Rapid Clearance of Xylella fastidiosa

  • Ecological Basis of Xylella fastidiosa Transmission to Grapevines

  • PD/GWSS Board Recent Actions

• Summer Articles

  • More to Raising Predatory Wasps Than Meets the Eye

  • Pierce's Disease Research Symposium Brings Together Research Community 

  • PD Research Awarded Best Viticulture Paper by ASEV

  • Exploration for Biological Control Agents in the Native Range of the Glassy-Winged Sharpshooter

  • Documentation & Characterization of Xylella fastidiosa Strains in Landscape Hosts

  • Compatibility of Select Insecticides with Natural Enemies of GWSS & Other Pests

  • Research Projects Funded by Pierce's Disease Assessment

• Spring Articles

  • It Was Cold - But Was it Cold Enough?

  • Dr. Andy Walker Talks about the New PD Resistant Winegrape Vines

  • Management of Pierce's Disease in Grapevines by Interfering with Cell-to-Cell Communication by Xylella Fastidiosa

  • Laboratory and Field Evaluations of Neonicotinoid Insecticides Against the Glassy-Winged Sharpshooter

  • Host Plant Preference and Natural Infectivity of Insect Vectors on Common Weeds Known to Host Xylella fastidiosa

  • New PD/GWSS Board Chair Ben Drake

• Winter Articles

  • San Luis Obispo - Still GWSS Free

  • Many Facets to New PD/GWSS Research Director

  • Identifying Key Predators of the Varios GWSS Life Stages

  • Magnetic Resonance Imaging: a Non-Destructive Approach for Detection of Xylem Blockages in Xylella fastidiosa (Pierce's Disease) Infected Grapevines

  • Reproductive Biology and Physiology of Female Glassy-Winged Sharpshooters: Morphology and Vitellogenesis Cycles

  • Pierce's Disease Research Symposium Focuses on Progress

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