Full TGIF Record # 124464
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DOI:10.1111/j.1365-3059.2007.01573.x
Web URL(s):http://onlinelibrary.wiley.com/doi/10.1111/j.1365-3059.2007.01573.x/full
    Last checked: 01/31/2014
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http://onlinelibrary.wiley.com/doi/10.1111/j.1365-3059.2007.01573.x/pdf
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Publication Type:
i
Refereed
Author(s):Hsiang, T.; Liao, A.; Benedetto, D.
Author Affiliation:Department of Environmental Biology, University of Guelph, Guelph, Ontario, Canada
Title:Sensitivity of Sclerotinia homoeocarpa to demethylation- inhibiting fungicides in Ontario, Canada, after a decade of use
Source:Plant Pathology. Vol. 56, No. 3, June 2007, p. 500-507.
Publishing Information:Oxford : Blackwell Scientific Publications
# of Pages:8
Related Web URL:http://onlinelibrary.wiley.com/doi/10.1111/j.1365-3059.2007.01573.x/abstract
    Last checked: 01/31/2014
    Notes: Abstract only
Keywords:TIC Keywords: Sclerotinia homoeocarpa; DMI fungicides; Fungicide resistance; Dollar spot; Application timing; Disease control; Chemical sensitivity; Propiconazole
Geographic Terms:Ontario, Canada
Abstract/Contents:"In late 2003, nine populations of Sclerotinia homoeocarpa in Ontario Canada (seven of which had been previously sampled in early 1994, prior to the registration of sterol demethylation-inhibiting (DMI) fungicides for turf disease control in Canada) were sampled and tested for sensitivity to propiconazole. Four of the nine populations had not been treated with DMI fungicides during the intervening years, and isolates from these locations were sensitive to propiconazole (geometric mean EC50 values of 0路005-0路012 渭g mL-1, compared with 0路005-0路008 渭g mL-1 for the original 1994 populations). Among the five populations from 2003 that had been exposed to DMI fungicides, mean EC50 values were significantly greater, ranging from 0路020 to 0路048 渭g mL-1. A significant correlation of determination was found between estimated number of fungicide applications and log EC50 (R2 = 0路832, P = 0路0001), and the equation predicted that 42路3 applications of propiconazole would be needed to bring a sensitive population (EC50 < 0路01 渭g mL-1) to a resistant level (EC50 > 0路10 渭g mL-1). Fungicide sensitivity vs. duration of fungicide efficacy was also tested, and it was found that isolates with decreased sensitivity were able to more quickly overcome the inhibitory effects of fungicide application, reducing the duration of control from 3 weeks to 2 weeks."
Language:English
References:21
Note:Figures
Tables
Graphs
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Hsiang, T., A. Liao, and D. Benedetto. 2007. Sensitivity of Sclerotinia homoeocarpa to demethylation- inhibiting fungicides in Ontario, Canada, after a decade of use. Plant Pathol. 56(3):p. 500-507.
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DOI: 10.1111/j.1365-3059.2007.01573.x
Web URL(s):
http://onlinelibrary.wiley.com/doi/10.1111/j.1365-3059.2007.01573.x/full
    Last checked: 01/31/2014
    Access conditions: Item is within a limited-access website
http://onlinelibrary.wiley.com/doi/10.1111/j.1365-3059.2007.01573.x/pdf
    Last checked: 01/31/2014
    Requires: PDF Reader
    Access conditions: Item is within a limited-access website
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