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| Web URL(s): | https://www.plantmanagementnetwork.org/pub/trial/fntests/reports/2000/55-491.pdf
Last checked: 05/03/2017
Requires: PDF Reader |
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| Publication Type:
| Report |
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| Author(s): | Dernoeden, P. H.;
Krouse, J. M.;
Kaminski, J. E. |
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| Author Affiliation: | Department of Natural Resource Sciences & LA, University of Maryland, College Park, MD |
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| Title: | Curative dollar spot control with fungicides, 1999 |
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| Section: | Turf grass reports
Other records with the "Turf grass reports" Section
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| Source: | Fungicide and Nematicide Tests. Vol. 55, 2000, p. 491. |
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| Publishing Information: | St. Paul, MN: American Phytopathological Society |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Application rates; Disease severity; Agrostis stolonifera; Dollar spot; Sclerotinia homoeocarpa; Disease control; Fungicides; Fungicide evaluation; Golf greens; Threshold values; Fungicide combinations
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| Cultivar Names: | Crenshaw |
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| Abstract/Contents: | "Treatments were applied with a CO₂ pressurized (34 psi) sprayer calibrated to deliver 2.5 gal water per 1000 sq ft. Dates of application are footnoted in the data table. Turf was maintained at a putting green mowing height of 0.156. Soil was a sandy greens mix with a pH of 6.5 and 1.8% OM. The site was fertilized with 3.0 lb N per 1000 sq ft annually. Plots were 5 ft by 5 ft, and were arranged in a randomized complete block with four replications. Percent of plot area blighted was assessed visually on a linear 0 to 100% scale where 0=no blight and 100=entire plot blighted. Ratings exceeding 0.5% blight threshold would be considered commercially unacceptable for golf course putting greens. Disease severity was moderately severe when the study was initiated, but became extremely severe by mid-Aug. Except for Heritage, all fungicide treatments had suppressed dollar spot when compared to non-fungicide-treated plots on 21 Jul (i.e., 7 days after application). On 27 Jul, it was evident that all treatments, except Heritage and Compass (5 to 8% blighting), had provided an equivalent level of disease suppression and most plots were relatively disease free on 3 and 10 Aug (data not shown). By 17 Aug, dollar spot pressure had become severe. Treatments associated with unacceptable dollar spot levels on 17 Aug (i.e., 21 days since last applied) included: Heritage; Compass; Banner MAXX (0.5 fl oz); Aliette Signature + Chipco 26GT or Daconil Ultrex; and Lynx (0.278 oz). On 24 Aug, generally acceptable dollar spot control was still evident in plots treated with the following: Banner MAXX (1.0 fl oz); Compass + Banner MAXX (0.15 + 1.0 fl oz); Bayleton, Lynx (0.556 oz); and Beyleton + Heritage or Thalonil. Except for Heritage, all treatments continued to suppress dollar spot, but only plots treated with Bayleton alone had not exceedefd the threshold on the final rating date. The mixture of either Lynx or Bayleton with Heritage tended to reduce dollar spot suppression when compared to Lynx or Bayleton alone, but the differences among these treatments were not significant. The presence of Compass in tank-mixtures with Banner MAXX did not influence the performance of Banner MAXX." |
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| Language: | English |
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| References: | 0 |
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| Note: | Tables |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Dernoeden, P. H., J. M. Krouse, and J. E. Kaminski. 2000. Curative dollar spot control with fungicides, 1999. Fungicide Nematicide Tests. 55:p. 491. |
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| If there are problems with this record, send us feedback about record 70037. |
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| Web URL(s):
https://www.plantmanagementnetwork.org/pub/trial/fntests/reports/2000/55-491.pdf
Last checked: 05/03/2017
Requires: PDF Reader |
| 
MSU catalog number: SB 951.3 .F82 |
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