Red blotch speakers

Speakers, Red Blotch Disease webinar

Grapevine red blotch disease and the virus associated with it has been confirmed in many major grape production regions of the United States and Canada. Since the identification of the virus in 2011, several teams of researchers from across North America have been intensely characterizing the disease and effects on grapevines, as well as characterizing the virus, its spread, and potential management. Considerable progress has been made, but much remains unknown. Speakers representing many of these labs will be presenting their work and what it means for the grape industry.

Welcome and Introduction: Frank Zalom, University of California at Davis

Frank ZalomFrank Zalom is Distinguished Professor of Entomology and Extension Entomologist at the University of California, Davis. He served as Director of the University of California’s Statewide Integrated Pest Management Program (UC IPM) from 1986-2002, Co-Chair of the Association of Public and Land Grant Universities’ National IPM Committee from 1999-2015, and was Grants Manager for the US Department of Agriculture’s Regional IPM Competitive Grants Program from 2005-2014. Zalom has maintained an active research program on tree fruit, small fruit and vegetable crops pests for over 37 years, co-authoring over 330 peer-reviewed publications and book chapters and serving as major Professor for 12 PhD students. 

History of Red Blotch, symptoms and significance: Mysore Sudarshana, USDA-ARS, Davis, CA

Mysore SudarshanaDr. Mysore Sudarshana (Sudhi) got his B.Sc.(Agri) and M.Sc.(Agri) from the University of Agricultural Sciences, India, and Ph.D. in Plant Science from the University of Idaho.  He conducted post-doctoral studies on the biology of geminiviruses in the Department of Plant Pathology, University of California, Davis, CA. Since 2008, he is a Research Biologist with the Crops Pathology and Genetics Research Unit, USDA-ARS, Davis, and has been working on the biology, detection and management of viruses infecting grapevines, stone fruit trees and walnut.

Etiology of Red Blotch: Marc Fuchs, Cornell University, Geneva, NY

Marc FuchsDr. Marc Fuchs is originally from France where he received his Master’s and PhD degrees. He has worked on viruses of fruit crops and vegetables over the past 30 years, developing detection techniques, understanding spread, and investigating management strategies.  For the past six years he’s been an Associate Professor with the Department of Plant Pathology and Plant-Microbe Biology at Cornell University in Geneva, New York.


Detection and Genetic Diversity of the Virus: Keith Perry, Cornell University, Ithaca, NY

Keith PerryKeith L. Perry (B.A. Botany, 1977, University of California, Berkeley; M.S. Plant Pathology, 1981, University of California, Davis; Ph.D., Plant Pathology, 1989,Cornell University.  From 1981-1984 worked at Chevron Chemical Company, Richmond, CA.  From 1989-1993 was an NSF Postdoctoral Fellow at Waite Institute, University of Adelaide and then the Plant Science Center at Cornell University.  Served as an Assistant then Associate Professor in the Department of Botany and Plant Pathology, Purdue University from 1994-2001.  In 2001, returned to Cornell University in Ithaca, New York to serve as an Associate Professor, as the endowed Henry and Mildred Uihlein Professor of Plant Pathology, and as Director of the New York State Foundation Seed Potato Program.

Effect of red blotch on grapevine performance: Rhonda Smith, UC Cooperative Extension

Rhonda SmithRhonda Smith has been a Viticulture Farm Advisor with the University of California Cooperative Extension in Sonoma County for over 25 years. She holds a MSc in Horticulture and a BSc in Plant Science from UC Davis. Her degrees emphasized viticulture and plant pathology respectively. Her current research projects include determining the effect of red blotch disease on grapevines, evaluating rootstocks for nematode resistance and investigations with vine growth disorders. Her long term research projects include data collection on frost conditions to help guide choices on spring frost protection practices.

Red blotch situation in Oregon: Vaughn Walton, Oregon State University and Bob Martin, USDA-ARS, Corvallis, OR

Vaughn WaltonVaughn Walton, Oregon State University works on economically important pests, with the aim to provide environmentally sustainable and minimal impact pest management strategies for agriculturalists in Oregon and further afield. Multiple techniques are used in a whole-system approach to obtain sustainable means of production. In order to obtain this goal, new knowledge obtained from detailed insect physiological, biological, behavioral, ecological and environmental studies are needed. This knowledge is then used to apply treatments timed to occur during periods when pests are at their most vulnerable. 

Bob MartinDr. Robert (Bob) Martin is a Research Plant Pathologist with the USDA-ARS Horticultural Crops Research Unit (HCRU) in Corvallis, Oregon. His research focuses on the characterization, detection and management of viruses in the grapes and berry crops.  He also serves as Research Leader for the HCRU, which has 16 Research Scientists, holds a courtesy professor appointment in the Department of Botany and Plant Pathology at Oregon State University and is a core faculty member of the OWRI. Bob has been involved with the National Clean Plant Network since its inception in 2007 and serves as chair of the NCPN for Berries and on the Tier II board of NCPN-Grapes. He is also active in the International Committee for Study of Viruses of Temperate Fruit Crops. He chairs the Grapevine Improvement Committee in Oregon that consists of growers, nursery managers, OSU faculty and Oregon Dept of Agriculture.

Red blotch and the virus in Canada: Sudarsana Poojari, Agri-Canada, Canada, T. Lowery, A-M. Schmidt, M. Rott, and J.R. Urbez-Torre

Sudarsana PoojariSudarsana Poojari, received his PhD in Plant Pathology from Washington State University in 2013. Currently, Sudarsan is working as a Post-doctoral Fellow at the Summerland Agriculture and Development Centre, Summerland, BC under supervision of Dr. Tom Lowery (Entomology) and Dr. Jose R. Urbez-Torres (Plant Pathology) and his research is focused on biological and epidemiological aspects of the grapevine viruses in British Columbia.


Red blotch and the virus in Europe: Jean-Sebastian Reynard, Agroscope, Switzerland

Jean-Sebastien ReynardJean-Sébastien Reynard is a junior scientist and grape virologist at Agroscope, the centre of excellence for agricultural research in Switzerland affiliated with the Federal Office for Agriculture. He received his MSc and PhD at ETHZurich, Switzerland. He has published journal articles on various grape viruses including a recent paper documenting presence of GRBaV in a field grown grapevine in Switzerland and affects on physiology and fruit composition, the first report of the disease and virus occurrence in Europe.

Virus spread, disease gradient, and insects: Brian Bahder, UC Davis

Brian BahderOriginally from Milford, Delaware, Brian Bahder received a bachelor’s degree in entomology from the University of Delaware.  Following an undergraduate research project on termites in Ecuador, he studied tropical termite biology and obtained a masters degree in entomology from the University of Florida. After this, he got involved in agricultural research and pursued a PhD at Washington State University studying scale insects and the epidemiology of Grapevine leafroll associated viruses in Washington vineyards. Afterwards, he had a brief post doctoral position at WSU working with Spotted Wing Drosophila and California Prionus Beetle.  In 2014, he joined UC Davis under Dr. Mysore Sudarshana and Dr. Frank Zalom as a post doc to identify the vector species responsible for transmitting GRBaV in California vineyards.

FPS and NCPN, Protecting the supply chain of grapevines from red blotch: Deborah Golino, FPS, UC Davis

Deborah GolinoDr. Deborah Golino has been the Director of Foundation Plant Services (FPS) since 1994.  FPS is a unit of the College of Agriculture and Environmental Sciences at University of California, Davis. FPS is dedicated to the distribution of disease tested, true to identity plant materials produced by UC researchers or improved by technology developed by UC researchers.  At this time, FPS is responsible for programs for grapes, strawberries, fruit trees, nut trees, sweet potatoes, and roses. These programs have played a key national and international role in distributing new crop varieties and healthy planting stocks. In addition to her position as FPS Director, she is a Cooperative Extension Specialist in the department of Plant Pathology, UC Davis, participating in teaching, extension and service. Her research program is directed at controlling the virus and virus-like diseases of grapevines with a focus on improved methods of pathogen detection and streamlining virus elimination techniques for clean stock and quarantine programs.

Question and Answer: moderated by Frank Zalom