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
 Southern Insect Management Research: Stoneville, MS
 close



    Research

                    Research Projects
                                    Publications
                                    Collaborations
                                    News
                People

                    Staff Listing
                                    CareersSearch small
                    Search
            
            ARS Home
                                About ARS
                                Contact Us




ARS Home Southeast Area Stoneville, Mississippi Southern Insect Management 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
                                            Leland, Jarroditem
                                            McGuire, Michaelitem
                                            Grace, Julieitem
                                            Jaronski, Stefanitem
                                            Ulloa, Mauricioitem
                                            PARK, YOUNG-HOON - UNIV. OF CA, DAVISitem
                                            Plattner, Ronald
  Submitted to: Biological Control
                                    Publication Type: Peer Reviewed Journal
                                    Publication Acceptance Date: 6/7/2004
                                    Publication  Date: 8/24/2004
                                    Citation: Leland, J.E., Mcguire, M.R., Grace, J.A., Jaronski, S., Ulloa, M., Park, Y., Plattner, R.D. 2004. Strain selection of a fungal entomopathogen, beauveria bassiana, for control of plant bugs (lygus spp.) (heteroptera : miridae). Biological Control.Interpretive Summary: Strains of a fungus (Beauveria bassiana) obtained from tarnished plant bugs and western tarnished plant bugs are being evaluated as potential microbial control candidates for controlling these two plant bug pests. Based on initial work with a large collection of strains from both plant bug species, eight strains were evaluated for characteristics relevant developing commercial control products. These characteristics included lethality to the two plant bug species, potential for the strains to grow on media, temperatures at which fungal growth is optimal, survival under artificial sunlight, and production of toxic compounds. Comparisons were made with a commercial strain  (GHA). Fungal strains from the two plant bug species caused higher mortality in these species than the commercial strain GHA. In many cases they cause over ten times more mortality. All strains from the two tarnished plant bug species grew slowly at 35 'C, whereas no growth was observed for the commercial strain. The isolates selected from western tarnished plant bug were the most tolerant to artificial sunlight. Strains from tarnished plant bug and western tarnished plant bug were most closely related to other strains from their same host species and all of these isolates were only distantly related to the commercial strain. Optimizing spore production conditions for a select strain may be necessary for practical development as a commercial product.
                                Technical Abstract: Beauveria bassiana (Balsamo) isolates from Lygus hesperus (Knight) and Lygus lineolaris (Palisot de Beauvois) are being evaluated as potential microbial control candidates for both Lygus species. Based on initial work with a large collection of isolates from both Lygus species, eight isolates were evaluated for characteristics relevant to mycoinsecticide development. These characteristics included pathogenicity to the two Lygus spp., in vitro conidia production, temperature growth optima, tolerance to solar radiation, and production of mycotoxins. Comparisons were made with a commercial isolate (GHA). Isolates from L. hesperus and L. lineolaris were more pathogenic than GHA with many being more than an order of magnitude more pathogenic based on LC50 values. All isolates from Lygus spp. grew slowly at 35 'C, whereas no growth was observed for GHA. The isolates selected from L. hesperus were the most tolerant to exposure to simulated solar radiation. Isolates from L. lineolaris and L. hesperus were most closely related to other isolates from their same host species and all of these isolates were only distantly related to GHA. Interestingly, one isolate from L. lineolaris in MS was more closely related to an isolate from L. lineolaris in AR than to other isolates from L. lineolaris from the same county in MS. Optimizing conidia production conditions for a select isolate may be necessary for practical development of a select isolate from Lygus spp. as a commercial mycoinsecticide.


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