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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Schumann, G. L.;
Reuter, H. M. |
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| Author Affiliation: | Dept. of Plant Pathology, University of Massachusetts |
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| Title: | Suppression of dollar spot with wheat bran top-dressings, 1992 |
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| Source: | Biological and Cultural Tests for Control of Plant. Vol. 8, 1993, p. 113. |
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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: Dollar spot; Sclerotinia homoeocarpa; Suppression; Agrostis stolonifera; Triticum aestivum; Topdressings
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| Abstract/Contents: | "Experimental plots were established on a creeping bentgrass putting green at the University of Massachusetts Turfgrass Research Facility in S. Deerfield, MA. The creeping bentgrass cultivar Penncross was established in 1979 on silt loam soil and maintained a mowing height of 6 mm. Plots were 1 m X 1 m and arranged in a randomized complete block design with six replications. Sterile wheat bran or a wheat-bran formualtion of a Streptomyces sp. were tested for ability to suppress dollar spot and ability to stimulate the population level of Streptomyces in the turf plots. Treatments were applied by spreading 150 g of sterile bran or bran infested with a Streptomyces isolate to each plot on a 7-day or 14-day schedule. Treatments were distributed by hand and rubbed lightly into the surface of the turfgrass. Disease was rated weekly by counting dollar spot infection foci. Dollar spot development was slow due to unusually cool weather conditions in 1992 with little disease in two untreated plots even at the end of the experiment. In previous studies, the Streptomyces isolate had inhibited the growth Sclerotinia homeocarpa in vitro and in growth chamber pot studies of creeping bentgrass inoculated with S. homeocarpa. The isolate showed no additional suppression of dollar spot in this field experiment beyond that exhibited by the application of sterile bran. Turfgrass and soil cores sampled from each plot at two week intervals throughout the experiment did not demonstrate any correlation between total actinomycete population and application of sterile bran or bran infested with the Streptomyces isolate. Actinomycete colonies were enumerated on ACtinomycete Isolation Agar. Either the application method did not successfully increase the isolate population, or the sampling method did not accurately assess the population increase. Similar dollar spot suppression was observed on an adjacent putting green where a similar experiment for suppression of brown patch (Rhizoctonia solani) had been established. Dollar spot was observed only in untreated plots; there were no dollar spot infection foci in plots treated with sterile bran or bran infested with the Streptomyces isolate applied on a 7-day schedule. No brown patch was observed during the experiment. The mode of action of dollar spot suppression by application of wheat bran to creeping bentgrass is not known." |
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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):
Schumann, G. L., and H. M. Reuter. 1993. Suppression of dollar spot with wheat bran top-dressings, 1992. Biol. Cult. Tests Control Plant Dis. 8:p. 113. |
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