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| Publication Type:
| Refereed |
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| Author(s): | Davis, J. G.;
Dernoeden, P. H. |
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| Author Affiliation: | Department of Natural Resource Sciences and Landscape Architecture, University of Maryland, College Park, MD |
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| Title: | Fermentation and delivery of Pseudomonas aureofaciens strain Tx-1 to bentgrass affected by dollar spot and brown patch |
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| Section: | Turfgrass diseases
Other records with the "Turfgrass diseases" Section
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| Meeting Info.: | Toronto, Ontario, Canada: July 2001 |
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| Source: | International Turfgrass Society Research Journal. Vol. 9, No. Part 2, 2001, p. 655-664. |
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| Publishing Information: | Oakville, Ontario, Canada: International Turfgrass Society |
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| # of Pages: | 10 |
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| Keywords: | TIC Keywords: Fermentation; Pseudomonas aureofaciens; Dollar spot; Brown patch; Biogation; Disease control; Bacteria; Agrostis stolonifera; Rhizoctonia solani; Sclerotinia homoeocarpa; Biological control; Fungicides; Nutrients; Supplements; Iprodione; Propiconazole; Residual effects
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| Abstract/Contents: | "The BioJect Biological Management System® (Bioject) automatically ferments and distributes disease suppressive bacteria onto turf and soil through an irrigation system. The first objective of the study was to determine the number of colony-forming units (cfu's) of Pseudomonas aureofaciens strain Tx-1 fermented and delivered by the BioJect to the turf and soil. The second objective was to evaluate the BioJect and Tx-1 for suppression of dollar spot (Sclerotinia homoeocarpa F.T. Bennet) in creeping bentgrass (Agrostis stolonifera L.) and brown patch (Rhizoctonia solani Kühn) in colonial bentgrass (Agrostis tenuis Sibth.). Sub-plot treatments included fungicides and nutrient supplements. When averaged over 1998 and 1999, 4.0 x 107 and 3.4 x 104 cfu of Tx-1 g-1 dry wt were recovered from the foilage plus thatch layer and soil, respectively. Dollar spot was reduced on average 33% (P < 0.05) and 27% (P < 0.10) in 1998 and 1999, respectively in plots receiving Tx-1 alone. The Tx-1 delayed dollar spot in iprodione and propiconazole-treated plots, thus extending their residual effectiveness for about 7 to 10-d in 1998, but fungicide residual effectiveness was unaffected in 1999. In 1998, Tx-1 reduced brown patch on two rating dates, but Tx-1-treated plots were more severely blighted by R. solani than the untreated control in 1999. None of the nutrient supplements or fungicides consistently impacted the number of Tx-1 cfu's detected. The level of dollar spot suppression provided by Tx-1 alone was not commercially acceptable from a quality or playability perspective and it was ineffective in controlling brown patch under moderate to high disease pressure conditions." |
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| Language: | English |
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| References: | 13 |
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| Note: | Tables |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Davis, J. G., and P. H. Dernoeden. 2001. Fermentation and delivery of Pseudomonas aureofaciens strain Tx-1 to bentgrass affected by dollar spot and brown patch. Int. Turfgrass Soc. Res. J. 9(Part 2):p. 655-664. |
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