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
 Fruit and Tree Nut Research: Byron, GA
 close



    Research

                    Research Projects
                                    Publications
                                    Collaborations
                                    News
                People

                    Staff Listing
                                    CareersSearch small
                    Search
            
            ARS Home
                                About ARS
                                Contact Us




ARS Home Southeast Area Byron, Georgia Fruit and Tree Nut 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

Title:   Author  item
                                            Bock, Cliveitem
                                            Shapiro Ilan, Daviditem
                                            Wedge, Daviditem
                                            Cantrell, Charles
  Submitted to: Pecan Grower
                                    Publication Type: Trade Journal
                                    Publication Acceptance Date: 12/10/2013
                                    Publication  Date: 3/1/2014
                                    Citation: Bock, C.H., Shapiro Ilan, D.I., Wedge, D.E., Cantrell, C.L. 2014. Identification of a naturally produced antifungal compound with activity against pecan scab. Pecan Grower. 25:52-60.Interpretive Summary: Pecan scab limits the productivity of pecan in the southeastern United States. Alternatives to conventional fungicides are needed, and ideally should be biorational, of low environmental risk with a reduced risk for fungicide resistance.
Extracts of a bacterial symbiont (Photorhabdus luminescens) from an entomopathogenic nematode were investigated using bioactivity-directed fractionation to identify the constituent(s) responsible for the activity. One of the metabolites was purified and identified as trans-cinnamic acid (TCA). In-vitro tests confirmed toxicity of TCA to Colletotrichum spp. (cause of anthracnose) and to F. effusum (cause of pecan scab). 
Naturally occurring anti-microbial products might offer a future alternative for control of pecan scab. Much additional research is warranted to determine the potential to use TCA as a suppressive agent for pecan scab and/or other diseases.
                                Technical Abstract: Pecan scab limits the productivity of pecan in the southeastern United States. Alternatives to conventional fungicides are needed, and ideally should be biorational, of low environmental risk with a reduced risk for fungicide resistance. Extracts of a bacterial symbiont (Photorhabdus luminescens) from an entomopathogenic nematode were investigated using bioactivity-directed fractionation to identify the constituent(s) responsible for the activity. One of the metabolites was purified and identified as trans-cinnamic acid (TCA). Laboratory tests confirmed toxicity of TCA to fungal species causing anthracnose (Colletotrichum spp) at 10 and 100 μg mL-1 using further bioassays. The activity of TCA was also tested in the laboratory against pecan scab (Fusicladium effusum), and showed toxicity at concentrations of 148-200+ μg mL-1. Naturally occurring anti-microbial products might offer a future alternative for control of pecan scab. Much additional research is warranted to determine the potential to use TCA as a suppressive agent for pecan scab and/or other diseases.


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