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
  Submitted to: Plant Disease
                                    Publication Type: Peer Reviewed Journal
                                    Publication Acceptance Date: 11/1/2005
                                    Publication  Date: 4/1/2006
                                    Citation: Baumgartner, K., Warnock, A.E. 2006. A soil inoculant inhibits armillaria mellea in vitro and improves productivity of grapevines with root disease. Plant Disease.Interpretive Summary: A commercial product known as Vesta® (Biologically Integrated Organics, Inc., Sonoma, CA) was tested for its ability to limit the growth of the fungal root pathogen, Armillaria mellea, the causal agent of Armillaria root disease. Armillaria root disease of grapevine is difficult to control, even with the aid of toxic chemicals, such as methyl bromide. The appeal of Vesta is that it is made by fermenting several different types of composted material and, therefor, is a relatively safe product. We found that both Vesta and bacteria cultured from Vesta significantly decreased the growth of the pathogen.  Efficacy of Vesta for postinfection control of Armillaria root disease of grapevine was examined in a diseased vineyard in Northern California. For treated rows, Vesta was applied to the soil via the drip-irrigation system to multiple rows in the vineyard in 2003 and 2004. Nontreated rows received irrigation water instead of Vesta. We collected measurements of yield, growth, nutrition, and grape juice quality from healthy and symptomatic vines in treated and nontreated vinerows. Vesta significantly increased cluster weights of symptomatic vines to levels equal to those of healthy vines.  However, Vesta did not decrease the rate of symptom development or mortality of treated vines and, therefore, may not provide long-term control of Armillaria root disease. Our findings of decreased nutrient concentrations, and lower sugar content in fruit from symptomatic vines demonstrate that Armillaria root disease negatively affects vine nutrition and fruit quality.
                                Technical Abstract: A commercially available soil inoculant, Vesta® (Biologically Integrated Organics, Inc., Sonoma, CA), was tested for its ability to inhibit Armillaria mellea, the causal agent of Armillaria root disease.  Undiluted inoculant and bacterial isolates cultured from the inoculant (Bacillus subtilis, B. lentimorbus, Comamonas testosteroni, Pseudomonas aeruginosa, P. mendocina) significantly inhibited colony diameter of A. mellea.  Efficacy of the inoculant for postinfection control of Armillaria root disease of grapevine was examined in an A. mellea-infested vineyard in Northern California.  Inoculant was applied to the soil via the drip-irrigation system to vinerows in replicate blocks in 2003 and 2004.  Yield, growth, mineral nutrition, and juice quality parameters of healthy and symptomatic vines were measured in treated and nontreated vinerows.  The inoculant significantly increased cluster weights of symptomatic vines to levels equal to those of healthy vines.  However, the inoculant did not decrease the rate of symptom development or mortality of treated vines and, therefore, may not provide long-term control of Armillaria root disease.  Our findings of decreased petiole P and K concentrations, and lower soluble solids content in fruit from symptomatic vines demonstrate that Armillaria root disease negatively affects vine mineral nutritional status and fruit quality.


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