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| Web URL(s): | https://archive.lib.msu.edu/tic/its/articles/1997jou875.pdf
Last checked: 09/29/2008
Requires: PDF Reader |
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| Publication Type:
| Refereed |
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| Author(s): | Gilstrap, D. M.;
Vargas, J. M. Jr.;
Golembiewski, R. C.;
Jones, A. L.;
Schabenberger, O. |
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| Author Affiliation: | Gilstrap and Schabenberger: Crop and Soil Sciences, Michigan State University, East Lansing, Michigan, USA; and Vargas and Jones: Botany and Plant Pathology, Michigan State University, East Lansing, Michigan, USA; and Golembiewski: Horticulture and Crop Science, The Ohio State University, Columbus, Ohio, USA |
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| Title: | Fungicide efficacy on demethylation inhibition (DMI) resistant Sclerotinia homoeocarpa |
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| Section: | Turf diseases: Contributed papers
Other records with the "Turf diseases: Contributed papers" Section
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| Meeting Info.: | Sydney, Australia: 1997 |
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| Source: | International Turfgrass Society Research Journal. Vol. 8, No. Part 1, 1997, p. 875-881. |
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| Publishing Information: | Blacksburg, VA: International Turfgrass Society |
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| # of Pages: | 7 |
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| Keywords: | TIC Keywords: DMI resistance; Sclerotinia homoeocarpa; Agrostis stolonifera; Poa annua; Disease control; Fungicides; Trials; Dicarboximides; Benzimidazoles
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| Abstract/Contents: | "Dollar spot is a widespread and major disease of turfgrasses worldwide. The causal organism, Sclerotinia homoeocarpa, has developed resistance to three major systemic-fungicide classes. The newest of these are the demethylation inhibitors (DMI) for which resistance was shown in 1995 by Michigan State University pathologists. A five-year study was conducted on a golf-course fairway containing DMI-resistant dollar spot. The turf contained a mixture of creeping bent (Agrostis stolonifera L.) and Poa annua L. at a mowing height of 1.3 cm. The repeated-measures study contained six treatments with five time points and three replications. The treatments represented an assortment of contact and systemic fungicides at different rates and application timings. The fungicides were combined or alternated, as well as applied alone. Samples were taken from the plot area before the initial treatments. Prior to and following each year's treatments thereafter, samples were collected from each plot. Each sample was isolated into pure culture and then grown on medium with 0 and 2 μg ml⁻¹ triadimefon. Relative-growth measurements were taken and modelled using a univariate repeated-measures analysis. The slopes associated with the estimated linear trends for each treatment showed the greatest increase in pathogen resistance occurred with DMIs alone, followed in oreder by DMIs, a contact fungicide, and DMIs alternated with non-DMIs. The trends for a dicarboximide and an untreated control were not significant." |
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| Language: | English |
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| References: | 10 |
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| Note: | Figures
Tables |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Gilstrap, D. M., J. M. Jr. Vargas, R. C. Golembiewski, A. L. Jones, and O. Schabenberger. 1997. Fungicide efficacy on demethylation inhibition (DMI) resistant Sclerotinia homoeocarpa. Int. Turfgrass Soc. Res. J. 8(Part 1):p. 875-881. |
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https://archive.lib.msu.edu/tic/its/articles/1997jou875.pdf
Last checked: 09/29/2008
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MSU catalog number: SB 433 .I52 v. 8 |
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