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| Publication Type:
| Report |
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| Author(s): | Boland, G. J.;
Smith, E. A. |
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| Author Affiliation: | Environmental Biology, University of Guelph |
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| Title: | Influence of biological control agents on dollar spot of creeping bentgrass, 1999 |
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| Section: | Turfgrass
Other records with the "Turfgrass" Section
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| Source: | Biological and Cultural Tests for Control of Plant Diseases. 2000, p. 50. |
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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 stolonifera; Dollar spot; Sclerotinia homoeocarpa; Biological control; Disease control; Fungicides; Fungicide evaluation; Iprodione; Disease severity; Topdressings; Fusarium heterosporum; Comparisons
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| Abstract/Contents: | "Test plots, located near Cambridge, Ontario, were chosen because of their history of dollar spot. 1991 trials. Replicate experiments were completed using naturally-occurring and artificially-infested inoculum. Artificially-infested inoculum was prepared as ground wheat seed colonized with S. homoeocarpa and applied at 20 g/plot (2 mĀ²). Treatments were applied every two weeks as foliar sprays of fungicide (iprodione as Rovral) at 0.6 g/plot, or biological control agents as 500 ml of cell suspensions (1 x 10ā¶ cells/ml) in a randomized complete block design with four replications. Noninoculated and inoculated fungicide-treated plots served as controls. Disease was evaluated by counting the number of dollar spots or foci per 2 mĀ² plot at five to eight day intervals. In 1991, comparisons were also made between regular and weather-timed applications of treatments according to the EnviroCaster disease prediction model (Neogen Corporation, Lansing, Michigan 48912). 1992 trials. Experimental design and evaluation were the same as in 1991. Research plots were naturally infested with S. homoeocarpa. Biological controls were applied as formulated topdressings at 125 g/2 mĀ² plot at two week intervals. Formulations included topdressings of sand:cornmeal (2:1 v:v) and sand:composted brewery waste (2:1 v:v). Uncolonized topdressings served as untreated controls. In 1991, the artifically-infested test developed significantly more dollar spot than the naturally-infested test, and the fungicide was the most effective treatment in both trials. The EnviroCaster disease model did not predict any infection periods in 1991 and no treatments were applied based on these recommendations (data not presented). In 1992, there were no significant differences between the sand:cornmeal and sand:composted brewery waste formulations of the biological control agents, and the fungicide was the most effective treatment in both trials. Of the microorganisms tested, only Fusarium heterosporum provided significant suppression of disease in more than one test." |
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| Language: | English |
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| References: | 0 |
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| See Also: | Other items relating to: TOPDRS |
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| Note: | Tables |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Boland, G. J., and E. A. Smith. 2000. Influence of biological control agents on dollar spot of creeping bentgrass, 1999. Biol. Cult. Tests Control Plant Dis. p. 50. |
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MSU catalog number: SB 975 .B5 |
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