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Spring 2020

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Winter 2020

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Newsletter Archive

To request a back issue of newsletters from 2018 and earlier, please contact Brown Miller Communications by phone at (925) 370-9777 or send a request via email.

2019

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 

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

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

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!

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?

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

California Department of Food and Agricu