U.S. flagAn official website of the United States government
                    Here's how you know **Official websites use .gov**
                            
                            A **.gov** website belongs to an official government organization in the United States.
 **Secure .gov websites use HTTPS**
                            
                            A **lock** (                            
                              A locked padlock                                                      
                            
                            ) or **https://** means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.


Menu Agricultural Research Service
						
                    U.S. DEPARTMENT OF AGRICULTURE
 Crops Pathology and Genetics Research: Davis, CA
 close



    Research

                    Research Projects
                                    Publications
                                    Collaborations
                                    News
                People

                    Staff Listing
                                    Careers


        


                    Outreach Events
                        UC Davis Picnic Day
                                    Kinders go to College
                                    STEM Girls
                                    Future Scientist Program
                                    Agriculture Future of America
                                    Wallace-Carver Fellowship
                                    Young Scholars Program
                                    Annual Awards Banquet
                    About Us
                        About Us
                                    Our Mission
                                    Principal InvestigatorsSearch small
                    Search
            
            ARS Home
                                About ARS
                                Contact Us




ARS Home Pacific West Area Davis, California Crops Pathology and Genetics Research Research Publications at this Location





- ARS National Programs
- Search for a scientific manuscript
- Search for a research project
- ARS Software
- Programs and Projects
- Collaborations
- Subjects of Investigation
- Publications
- Etiology and Biology of Tree Crop Diseases
- Rice Genetics
- Sustainable Floriculture
- Sustainable Viticulture

Title:   Author  item
                                            Fujiyoshi, Phillipitem
                                            ROLSHAUSEN, PHILIPPE - University Of Californiaitem
                                            Castlebury, Lisaitem
                                            MIZUHO, NITA - Virginia Polytechnic Institution & State Universityitem
                                            Baumgartner, Kendra
  Submitted to: Phytopathology
                                    Publication Type: Abstract Only
                                    Publication Acceptance Date: 3/1/2011
                                    Publication  Date: 6/1/2011
                                    Citation: Fujiyoshi, P.T., Rolshausen, P., Castlebury, L.A., Mizuho, N., Baumgartner, K. 2011. New Phomopsis species identified from wood cankers in eastern North American vineyards.. Phytopathology. 101:S56.Interpretive Summary: Phomopsis cane and leaf spot, caused by the Ascomycete fungus Phomopsis viticola, is a destructive fruit and foliar disease in eastern North American vineyards. The pathogen typically attacks green tissues, but can also cause wood cankers, presumably due to infection of pruning wounds, as is the case for most canker pathogens of grape (e.g., Eutypa lata). If pruning wounds are an infection court for P. viticola, then controls for preventing infection of green tissues may not prevent pruning-wound infection. Accordingly, we surveyed the Phomopsis community (teleomorph Diaporthe) from wood cankers in vineyards of the northeastern US (CT, MA, MD, MI, NH, NJ, NY, OH, RI, VA, VT) and southeastern Canada (Ontario, Quebec), and evaluated the susceptibility of pruning wounds to infection by the Phomopsis species recovered. We used conidial dimensions, colony growth on potato dextrose agar, and phylogenetic analyses of nuclear loci (rDNA internal transcribed spacer region, elongation factor subunit 1-alpha, actin), to identify P. viticola from wood cankers and two new species not previously reported from grape: Diaporthe eres and a species with DNA sequences identical to isolates identified as P. fukushii in Japan. Pathogenicity tests on Vitis labruscana ‘Concord’ and V. vinifera ‘Chardonnay’ in Geneva, NY demonstrated that pruning wounds of both are susceptible to infection by strains of all three Diaporthe/Phomopsis species.
                                Technical Abstract: Phomopsis cane and leaf spot, caused by the Ascomycete fungus Phomopsis viticola, is a destructive fruit and foliar disease in eastern North American vineyards. The pathogen typically attacks green tissues, but can also cause wood cankers, presumably due to infection of pruning wounds, as is the case for most canker pathogens of grape (e.g., Eutypa lata). If pruning wounds are an infection court for P. viticola, then controls for preventing infection of green tissues may not prevent pruning-wound infection. Accordingly, we surveyed the Phomopsis community (teleomorph Diaporthe) from wood cankers in vineyards of the northeastern US (CT, MA, MD, MI, NH, NJ, NY, OH, RI, VA, VT) and southeastern Canada (Ontario, Quebec), and evaluated the susceptibility of pruning wounds to infection by the Phomopsis species recovered. We used conidial dimensions, colony growth on potato dextrose agar, and phylogenetic analyses of nuclear loci (rDNA internal transcribed spacer region, elongation factor subunit 1-alpha, actin), to identify P. viticola from wood cankers and two new species not previously reported from grape: Diaporthe eres and a species with DNA sequences identical to isolates identified as P. fukushii in Japan. Pathogenicity tests on Vitis labruscana ‘Concord’ and V. vinifera ‘Chardonnay’ in Geneva, NY demonstrated that pruning wounds of both are susceptible to infection by strains of all three Diaporthe/Phomopsis species.


Return to top


Connect with ARS Sign up


ARS Home
                            USDA.gov
                            Plain Writing
                            Policies & Links
                            Civil Rights Statements
                            FOIA
                            Accessibility Statement
                            Privacy Policy
                            Non-Discrimination Statement
                            Quality of Information
                            USA.gov
                            WhiteHouse.gov