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Web URL(s): | https://scisoc.confex.com/scisoc/2018am/meetingapp.cgi/Paper/111090 Last checked: 11/14/2018 Requires: JavaScript |
Publication Type:
| Report |
Content Type: | Abstract or Summary only |
Author(s): | Jung, Geunhwa;
Lee, Jaemin;
Popko, James T. Jr. |
Author Affiliation: | Jung: University of Massachusetts-Amherst, Amherst, MA; Lee and Popko: Stockbridge School of Agriculture, University of Massachusetts, Amherst, MA; |
Title: | Understanding population dynamics of Sclerotinia homoeocarpa for the development of SDHI fungicide resistance management strategies on golf courses |
Section: | C05 turfgrass science Other records with the "C05 turfgrass science" Section
Turfgrass pest management: Weed science and plant pathology Other records with the "Turfgrass pest management: Weed science and plant pathology" Section
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Meeting Info.: | Baltimore, Maryland: November 4-7, 2018 |
Source: | ASA, CSSA and SSSA International Annual Meetings. 2018, p. 111090. |
Publishing Information: | [Madison, Wisconsin]: [American Society of Agronomy, Crop Science Society of America, and Canadian Society of Agronomy] |
# of Pages: | 1 |
Keywords: | TIC Keywords: Dollar spot; Fungicide residues; Sclerotinia homoeocarpa; Succinate dehydrogenase
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Abstract/Contents: | "Clarireedia spp. cause dollar spot disease on turfgrass and is one of the most important pathogens on golf courses in North America. Succinate dehydrogenase inhibitors (SDHIs) are a fungicide class used to prevent dollar spot. SDHI fungicides restrict fungal respiration by blocking the ubiquinone-binding site (ubiquinone pocket) of succinate dehydrogenase (SDH). SDH complex comprises of four subunits; SdhA, SdhB, SdhC, and SdhD. Only SdhB, SdhC, and SdhD are involved in making the ubiquinone pocket. Recent studies show SDHI fungicides induce variable point mutations in SdhB, SdhC, and SdhD subunits of several plant pathogenic fungal species. In Clarireedia spp., two different point mutations (H267R/Y) in SdhB gene and two different point mutations (G91R and G150R) in SdhC gene were characterized and validated as functional. Furthermore, in vitro bioassays using boscalid, fluxapyroxad, isofetamid, penthiopyrad and fluopyram revealed each point mutation confered different cross resistance profiles. SdhC G91R and G150R mutants were confirmed to have increased resistance to all SDHIs except fluopyram. SdhB H267R mutants showed increased resistance only to boscalid. SdhB H267Y mutants indicated moderate resistance to fluxapyroxad and penthiopyrad and increased sensitivity to fluopyram. Field experiments were conducted to determine the correlation between in vitro resistance profiles and field efficacy of the different SDHIs." |
Language: | English |
References: | 0 |
Note: | This item is an abstract only! "174-6" |
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete): Jung, G., J. Lee, and J. T. Jr. Popko. 2018. Understanding population dynamics of Sclerotinia homoeocarpa for the development of SDHI fungicide resistance management strategies on golf courses. Agron. Abr. p. 111090. |
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