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| DOI: | 10.1094/PHYTO-103-6-S2.1 |
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| Web URL(s): | http://apsjournals.apsnet.org/doi/pdf/10.1094/PHYTO-103-6-S2.1#page=5
Last checked: 06/03/2013
Requires: PDF Reader
Notes: Item is within a single large file |
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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Allan, E.;
Campbell-Nelson, K.;
Sang, H.;
Seaman, M.;
Popko, J.;
Jung, G. |
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| Author Affiliation: | Allan: University of Massachusetts-Amherst, South Hadley; Campbell-Nelson, Sang, Seaman, Popko and Jung: University of Massachusetts-Amherst, Amherst, MA |
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| Title: | Evidence of field selection of DMI insensitive isolates of Sclerotinia homoeocarpa by the SDHI fungicide, boscalid |
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| Section: | 2013 APS-MSA Joint Meeting abstracts of presentations
Other records with the "2013 APS-MSA Joint Meeting abstracts of presentations" Section
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| Meeting Info.: | Austin, Texas: August 10-14, 2013 |
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| Source: | Phytopathology. Vol. 103, No. 6S, June supplement 2013, p. S2.5. |
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| Publishing Information: | St. Paul, Minnesota: American Phytopathological Society |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Boscalid; DMI fungicides; Dollar spot; Fungicide efficacy; Fungicide resistance; Sclerotinia homoeocarpa
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| Trade Names: | Emerald |
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| Abstract/Contents: | "Dollar spot, caused by Sclerotinia homoeocarpa, is one of the most economically important turf diseases in the Northeastern United States and is controlled by multiple fungicide classes. Reduced sensitivity of S. homoeocarpa to demethylation inhibitors (DMIs), dicarboximides, and methyl benzimidazole carbamates has been reported throughout the country but no resistance to succinate dehydrogenase inhibitors (SDHI) has been reported. Two independent studies were conducted on a golf course with a bimodal population distribution of DMI sensitive and insensitive fungal isolates. We observed in 2010, 2011, and 2012 that applications of the SDHI fungicide boscalid (Emerald) selected for DMI insensitive isolates on this golf course, shifting the population to a more unimodal distribution. In vitro analysis of 10 S. homoeocarpa DMI insensitive and sensitive isolates collected from the same location previously showed a strong correlation between EC50 of the DMI propiconazole and EC95 of boscalid and overexpression of the multidrug resistance transporter, ShMR1, in those DMI insensitive isolates. In addition, boscalid induces overexpression of this gene similarly to propiconazole. The selection of DMI insensitivity by boscalid may have important implications for managing fungicide resistance and for development of new fungicide chemistries." |
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| Language: | English |
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| References: | 0 |
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| Note: | This item is an abstract only! |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Allan, E., K. Campbell-Nelson, H. Sang, M. Seaman, J. Popko, and G. Jung. 2013. Evidence of field selection of DMI insensitive isolates of Sclerotinia homoeocarpa by the SDHI fungicide, boscalid. Phytopathology. 103(6S):p. S2.5. |
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| DOI: 10.1094/PHYTO-103-6-S2.1 |
| Web URL(s):
http://apsjournals.apsnet.org/doi/pdf/10.1094/PHYTO-103-6-S2.1#page=5
Last checked: 06/03/2013
Requires: PDF Reader
Notes: Item is within a single large file |
| 
MSU catalog number: b2219736a |
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