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| Web URL(s): | http://apsjournals.apsnet.org/doi/pdf/10.1094/PHYTO.2005.95.6.S1#page=104
Last checked: 10/20/2015
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): | Tredway, L. |
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| Author Affiliation: | North Carolina State University |
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| Title: | Sensitivity to benzimidazole, dicarboxamide, and DMI fungicides in North Carolina populations of Sclerotinia homoeocarpa |
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| Section: | APS Abstracts Submitted for Presentation at the 2005 APS Annual Meeting
Other records with the "APS Abstracts Submitted for Presentation at the 2005 APS Annual Meeting" Section
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| Source: | Phytopathology. Vol. 95, No. 6, June Supplement 2005, p. S104. |
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| Publishing Information: | St. Paul, MN: American Phytopathological Society |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Sclerotinia homoeocarpa; Fungicides; Dollar spot; Fungicide resistance; Dicarboximides; DMI fungicides; DMI resistance; Benzimidazoles
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| Geographic Terms: | North Carolina |
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| Abstract/Contents: | "Dollar spot, a foliar disease caused by Sclerotinia homoeocarpa, continues to be one of the most severe diseases of golf course turfgrasses. A survey was conducted to determine the distribution of fungicide resistance in populations of this pathogen from putting greens and fairways in North Carolina. Isolates (30-50 per location) were collected from 15 locations, including 13 exposed populations from golf courses and 2 unexposed baseline populations. Baseline populations contained low frequencies of thiophanate-methyl resistance (5% and 10%), but 95% of isolates from exposed populations were resistant to this fungicide. Resistance to iprodione was detected in one location on Poa annua putting greens in Western NC. At this site, 97% of isolates grew on PDA containing 10 ppm iprodione, whereas all other isolates were inhibited by this concentration. Mean EC50 values for propiconazole were 0.017 and 0.019 in baseline populations. Mean EC50 values for exposed populations ranged from 0.018 (resistance factor = 1) to 0.068 (resistance factor = 3.78). Although benzimidazole resistance is common in North Carolina populations of Sclerotinia homoeocarpa, resistance to dicarboxamide and DMI fungicides is not widespread. Factors other than fungicide resistance are likely responsible for reported difficulties in managing dollar spot." |
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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):
Tredway, L. 2005. Sensitivity to benzimidazole, dicarboxamide, and DMI fungicides in North Carolina populations of Sclerotinia homoeocarpa. Phytopathology. 95(6):p. S104. |
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| Web URL(s):
http://apsjournals.apsnet.org/doi/pdf/10.1094/PHYTO.2005.95.6.S1#page=104
Last checked: 10/20/2015
Requires: PDF Reader
Notes: Item is within a single large file |
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MSU catalog number: SB 599 .P48 |
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