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| Web URL(s): | https://scisoc.confex.com/scisoc/2018am/meetingapp.cgi/Paper/112716
Last checked: 11/14/2018
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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Anthony, Allison;
Kerns, James P. |
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| Author Affiliation: | Anthony: North Carolina State University, Raleigh, NC; Kerns: Department of Entomology and Plant Pathology, North Carolina State University, Raleigh, NC |
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| Title: | In vivo screening for SDHI insensitivity in dollar spot causal agent |
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| Section: | C05 turfgrass science
Other records with the "C05 turfgrass science" Section
Molecular techniques, genetics and plant breeding II: Abiotic and biotic stress oral (includes student competition)
Other records with the "Molecular techniques, genetics and plant breeding II: Abiotic and biotic stress oral (includes student competition)" Section
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| Meeting Info.: | Baltimore, Maryland: November 4-7, 2018 |
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| Source: | ASA, CSSA and SSSA International Annual Meetings. 2018, p. 112716. |
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| Publishing Information: | [Madison, Wisconsin]: [American Society of Agronomy, Crop Science Society of America, and Canadian Society of Agronomy] |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Clarireedia; Comparisons; Disease susceptibility; Dollar spot; Genetic analysis; In vivo; Sclerotinia homoeocarpa
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| Abstract/Contents: | "Previously known as Sclerotinia homoeocarpa, the group of species in the genus Clarireedia are fungi which cause the disease dollar spot on turfgrasses. This disease is a significant problem for highly maintained turfgrass and the most costly to control for worldwide. In the summer of 2016, there was an observed failure of SDHIs to control C. jacksonii in experimental plots. After testing multiple types of media, traditional amended-media screening has failed to exhibit the insensitivities which have been observed in the field. To compensate for this and to establish isolate-based sensitivity differences, in vivo fungicide trials were performed. 15 isolates (11 collected from "resistance" event at NCSU research plots, 4 from various locations with no field observed resistance) were chosen to inoculate 8 week-old 'Penn-A1' creeping bent grass grown in conetainers. Inoculations took place the day after plants were sprayed with 14 day rates of boscalid, penthiopyrad, and fluxapyroxad. Infested rye grains were used for inoculations and the conetainers were placed in humidified growth chambers in a completely randomized block design for disease development. The infection centers were measured and disease severity was taken on day 5 when significant amounts of disease had developed. From this screening, the control isolates were numerically the most SDHI sensitive isolates and a few isolates were statistically insensitive to some of the SDHI fungicides. This suggests that in vivo screenings may be more informative than in vitro screenings when it comes to this particular fungus and class of fungicides. The observed insensitivities being only a small portion of collected isolates leads to the question of how much of the "resistance" event really was a result of a truly insensitive population. Further investigation to other environmental factors that may be at play is necessary to establish the cause of chemical failure." |
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| Language: | English |
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| References: | 0 |
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| Note: | This item is an abstract only!
"71-7" |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Anthony, A., and J. P. Kerns. 2018. In vivo screening for SDHI insensitivity in dollar spot causal agent. Agron. Abr. p. 112716. |
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Last checked: 11/14/2018
Requires: JavaScript |
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