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| Web URL(s): | http://www.tandfonline.com/doi/pdf/10.1080/07060660609507307#page=12
Last checked: 04/04/2016
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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Hsiang, T.;
Liao, A. |
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| Author Affiliation: | Department of Environmental Biology, University of Guelph, Guelph, Ontario, Canada |
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| Title: | Sensitivity of Sclerotinia homoeocarpa, in Ontario, to demethylation-inhibiting fungicides, 10 years after the first use |
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| Section: | Abstracts: Annual meeting
Other records with the "Abstracts: Annual meeting" Section
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| Source: | Canadian Journal of Plant Pathology. Vol. 28, No. 2, April-June 2006, p. 353. |
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| Publishing Information: | Canadian Phytopathological Society |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Application rates; DMI fungicides; Herbicide resistance; Sclerotinia homoeocarpa
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| Abstract/Contents: | "In a previous research, eight populations of Sclerotinia homoeocarpa Bennett were sampled in southern Ontario, in early 1994, prior to the registraion of demethylation-inhibiting (DMI) fungicides for turf-disease control in Canada. Seven of these populations were found to have high sensitivity to DMI fungicides such as propiconazole. In late 2003, seven of the eight original populations plus two new populations were sampled and tested for sensitivity to propiconazole to assess whether changes had occurred. Four of the nine populations had not been previously treated with DMI fungicides, and these populations were as sensitive to propiconazole as the original populations. In the five populations exposed to DMI fungicides, mean concentrations effective on 50% of the populations (EC50) were several times greater than those required on the previously untreated populations. A significant correlation was found between the estimated number of DMI-fungicide applications and log EC50 (R =0.664, P =0.0075), and the derived equation predicted that 28 applications of propiconazole would be needed to bring a sensitive population (EC50 < 0.005 μg/mL) to a resistant level (EC50 > 0.10 μg/mL). However, some of the populations may have been exposed to over 28 applications, and yet no field resistance to DMI fungicides was reported. So perhaps reduced fitness of isolates with reduced sensitivity, or invasion of treated sites by sensitive isolates, affected fungicide-sensitivity levels." |
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| Language: | English |
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| References: | 0 |
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| See Also: | See also related article "Sensitivity of Sclerotinia homoeocarpa to demethylation-inhibiting fungicides in Ontario, Canada, after a decade of use" Plant Pathology, 56(3) June 2007, p. 500-507 R=124464 R=124464 |
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| Note: | Reprint appears in Guelph Turfgrass Institute Annual Research Report 2006, Vol. 20 2006, p. 57
This item is an abstract only! |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Hsiang, T., and A. Liao. 2006. Sensitivity of Sclerotinia homoeocarpa, in Ontario, to demethylation-inhibiting fungicides, 10 years after the first use. Can. J. Plant Pathol. 28(2):p. 353. |
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| Web URL(s):
http://www.tandfonline.com/doi/pdf/10.1080/07060660609507307#page=12
Last checked: 04/04/2016
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
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MSU catalog number: b2189612 |
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