UC Davis Grapevine Red Blotch Disease Symposium

Event Date

UC Davis Conference Center

On March 16, 2022, the UC Davis Department of Viticulture and Enology Extension Team will host a Grapevine Red Blotch Disease Symposium. This event will be presented both in person at the UC Davis Conference Center and livestreamed for those unable to attend in person. The program will cover topics that relate to Red Blotch disease in grapevines. Presentations will include: the role of treehoppers, treatments, mitigation strategies, the impact of the disease on the composition of wine, and more.


This is a hybrid event. Attendees have the option of attending in-person at the Conference Center on the UC Davis Campus, or by live stream.


9:00 am                       
Welcome, David E. Block, Chair and Professor, Department of Viticulture & Enology, UC Davis, Kaan Kurtural, Associate Professor of Cooperative Extension, Viticulture, Department of Viticulture and Enology, UC Davis

9:10 am                       
Role of treehoppers in red blotch epidemiology, Frank Zalom, Distinguished Professor of Entomology and Cooperative Extension Specialist, Department of Entomology and Nematology, UC Davis

9:40 am                       
Seasonal ecology of three-cornered alfalfa hopper in vineyards, Houston Wilson,
Assistant Cooperative Extension Specialist, Kearney Agricultural Research and Extension Center, Department of Entomology, UC Riverside

10:10 am                      
Searching for potential vectors of grapevine red blotch virus, Kent Daane, Professor of Cooperative Extension, Department of Environmental Science, Policy and Management, UC Berkeley

10:40 am                      

11:00 am                      
How to use a model to time ground cover management that disrupts three-cornered alfalfa hopper life cycles in grapevine red blotch disease-affected areas, Cindy Kron, UCCE North Coast Area IPM Advisor (Napa, Sonoma, Mendocino, and Lake Counties)

11:30 am
Recognition and spread of grapevine red blotch disease, what have we learned in the last 10 years? Cristian Olaya, Post-Doctoral Researcher, Department of Plant Pathology, UC Davis

12:00 pm
Proximal sensing technologies for GRBV disease in vineyards (tentative), Rewa Rai, Project Scientist, Department of Food Science and Technology, UC Davis

12:30 pm                     

2:00 pm                       
Effects of crop level adjustments on non-structural carbohydrates and flavonoids in grapevine (Vitis vinifera L.) infected by grapevine red blotch virus, Justin Tanner, Post Graduate Researcher, Department of Viticulture and Enology, UC Davis

2:30 pm
Increasing applied water to GRBV infected grapevine did not improve carbohydrate translocation to grape berry, Kaan Kurtural, Associate Professor of Cooperative Extension, Viticulture, Department of Viticulture and Enology, UC Davis

3:00 pm
Impact of red blotch disease on grape and wine composition and potential mitigation strategies, Anita Oberholster, Associate Professor of Cooperative Extension, Enology, Department of Viticulture and Enology, UC Davis


DPR Units: 3.5 (approved)

  • To receive continuing education credits, in-person attendees are required to stay for the entire program and sign-in at the end of the event.
  • If attending by livestream, attendees are required to take an exam following the program and receive a passing score of 70% to obtain credits. If an attendee does not pass the exam the first time, they will be given a second opportunity. 


Livestream - $150


If you need a hotel room, you can reserve one at the Hyatt Place Davis for $189/night before taxes and fees. This rate includes parking and breakfast.  


The following is required of all event attendees:

  • Visitors are required to complete a Daily Symptom Survey prior to entering facilities on campus. You will be asked to be show proof of this survey when checking-in at the event.
  • All attendees are required to wear face coverings indoors, regardless of vaccination status.
  • Unvaccinated individuals are also required to wear a face-covering outdoors in crowded spaces

For more information about current campus policies for visitors, please visit: https://campusready.ucdavis.edu/visitors

Guidelines are subject to change at any time as the COVID-19 situation evolves. We will be sure to communicate any changes as they occur.


If you are feeling under the weather, exhibiting any possible symptoms of COVID-19, or have been exposed to a positive COVID-19 case within the last 14 days, we ask that you stay home and do not attend the event. We will provide refunds for COVID-19 related reasons or transfer your payment to a future event. If you need to cancel for a COVID-19 related reason, please email cjfirman@ucdavis.edu.

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