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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Cook, S.;
Hsiang, T. |
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| Author Affiliation: | Environmental Biology, University of Guelph, ON |
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| Title: | Resistance of bentgrass cultivars to dollar spot disease, 1992 |
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| Source: | Biological and Cultural Tests for Control of Plant. Vol. 8, 1993, p. 110. |
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| Publishing Information: | St. Paul, MN: The American Phytopathological Society |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Agrostis; Cultivars; Dollar spot; Sclerotinia homoeocarpa; Disease resistance
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| Abstract/Contents: | "Nineteen cultivars of bentgrass were evaluated for resistance to dollar spot disease at the Cambridge Research Station of the University of Guelph near Cambridge, Ontario. The species and cultivars are browntop bentgrass (Agrostis capillaris): Egmont; Colonial bentgrass (Agrostis tenuis): Tracenta, Bardot, Allure; creeping bentgrass (Agrostis palustris): Cobra, SR 1020, Forbes 89-12, Carmen, Penneagle, Tamu 88-1, Providence, Emerald, National, Normarc 101, Putter, Penncross, 88.CBL, WVBP 89-D-15; and dryland bentgrass (Agrostis castellana): BR 1518. The plots were seeded at 2.2 g/m2 on 23 Aug 1990. Cultivars were arranged in a randomized block design of 1 m x 2 m plots, with 3 replications. The grass was maintained at a putting green height (7 mm). To ensure an even inoculum pressure, the fungus was applied to all plots. Inoculum was prepared by incubating 5 strains of the fungus individually, on autoclaved cereal grains (chicken scratch) for 2-3 weeks in mason jars. After drying overnight, the inoculum was chopped in an Osterizer blender into small particles. The 5 strains of fungus were mixed together, and 2 g were evenly applied to each plot. Inoculum was first applied 8 Jul 1992 to initiate disease. Evaluations were made weekly for 5 weeks until 5 Aug 1992. Analysis of variance on each week's data was performed using PROC ANOVA in SAS. Whan a significant cultivar effect was found in the analysis of variance, mean separation was done with the test of least significance difference (LSD). Dollarspot disease pressure was intense this field season. The combination of unusually frequent rainfall and temperatures between 10 and 20 C provided optimal conditions for disease development. This test was a repeat of one previously reported in 1991. Overall the cultivars Tracenta, Bardot, Egmont, BR 1518 and Allure showed the highest dollar spot resistance during the 1992 field season. These are all cultivars of bentgrass species other than creeping bentgrass, and are the same five highest ranking cultivars as found in 1991. The cultivars with the worst performance were: Putter, Emerald, Forbes 89-12, and SR 1020, which are all creeping bentgrass cultivars, and were also among the most susceptible in 1991." |
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| Language: | English |
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| References: | 0 |
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| See Also: | Other items relating to: DOLLAR |
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| Note: | Table
This item is an abstract only! |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Cook, S., and T. Hsiang. 1993. Resistance of bentgrass cultivars to dollar spot disease, 1992. Biol. Cult. Tests Control Plant Dis. 8:p. 110. |
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