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
                                            Baumgartner, Kendraitem
                                            WARNOCK, AMY - USDA, ARS, CPGRU
  Submitted to: American Phytopathological Society Abstracts
                                    Publication Type: Abstract Only
                                    Publication Acceptance Date: 8/1/2006
                                    Publication  Date: 8/1/2006
                                    Citation: Baumgartner, K., Warnock, A. 2006. Biological control of armillaria root disease of grapevine. American Phytopathological Society Abstracts.Interpretive Summary: Armillaria root disease causes significantly lower yield and growth, lower root absorption of nutrients from the soil, delayed ripening of fruit, and eventual death of grapevines infected with Armillaria mellea. We pursued a novel tactic for control of the disease with Vesta (BIO, Sonoma, CA), a soil inoculant containing a mixture of bacteria that are antagonistic to the pathogen. Vesta was applied via drip-irrigation (47 liters/ha at budbreak and bloom, 19 liters/ha at 15% and 85% veraison) to vineyard rows in three separate sections of a Cabernet Sauvignon vineyard for two years. We measured yield, growth, nutrition, and juice quality of 12 healthy and 12 symptomatic vines in treated and nontreated rows of each section. Symptomatic vines treated with Vesta had significantly higher cluster weights (109.63 g) that were comparable to those of healthy vines (122.09 g), which shows that Vesta can restore cluster weights to normal levels, an important factor for wine quality. Vesta had no stimulatory effect on healthy vines, suggesting that its efficacy is a function of its effects on the pathogen. Vesta and bacteria cultured from it (e.g. Pseudomonas aeruginosa) on yeast malt extract agar significantly inhibited the pathogen in inhibition assays. Our results indicate that Vesta is therapeutic to infected vines and that antagonistic bacteria may contribute to its efficacy. Studies are underway to identify additional antagonistic bacteria in Vesta and to characterize their modes of action.
                                Technical Abstract: Armillaria root disease causes significantly lower yield and growth, lower root absorption of macronutrients, delayed ripening of fruit, and eventual death of grapevines infected with Armillaria mellea. We pursued a novel tactic for control of the disease with Vesta (BIO, Sonoma, CA), a soil inoculant containing a mixture of antagonistic bacteria. Vesta was applied via drip-irrigation (47 liters/ha at budbreak and bloom, 19 liters/ha at 15% and 85% veraison) to vinerows in three blocks of a Cabernet Sauvignon vineyard for two years. We measured yield, growth, nutrition, and juice quality of 12 healthy and 12 symptomatic vines in treated and nontreated sections of each block. Symptomatic vines treated with Vesta had significantly higher cluster weights (109.63 g) that were comparable to those of healthy vines (122.09 g), which shows that Vesta can restore cluster weights to normal levels, an important factor for wine quality. Vesta had no stimulatory effect on healthy vines, suggesting that its efficacy is a function of its effects on the pathogen. Vesta and bacteria cultured from it (e.g. Pseudomonas aeruginosa) on yeast malt extract agar significantly inhibited the pathogen in inhibition assays. Our results indicate that Vesta is therapeutic to infected vines and that antagonistic bacteria may contribute to its efficacy. Studies are underway to identify additional antagonistic bacteria in Vesta and to characterize their modes of action.


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