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| Web URL(s): | https://www.plantmanagementnetwork.org/pub/trial/pdmr/reports/2013/T015.pdf
Last checked: 11/14/2016
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Access conditions: Item is within a limited-access website |
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| Publication Type:
| Report |
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| Author(s): | Popko, J.;
Jung, G. |
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| Author Affiliation: | Stockbridge School of Agriculture, University of Massachusetts, Amherst, MA |
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| Title: | Curative dollar spot control on a creeping bentgrass and annual bluegrass putting green, 2012 |
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| Section: | Turfgrass
Other records with the "Turfgrass" Section
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| Source: | PDMR: Plant Disease Management Reports. Vol. 7, 2013, p. T015. |
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| Publishing Information: | St. Paul, Minnesota: American Phytopathological Society |
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| # of Pages: | 3 |
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| Related Web URL: | http://www.plantmanagementnetwork.org/pub/trial/PDMR/volume7/abstracts/T015.asp
Last checked: 04/03/2013
Access conditions: Document is within a limited-access website
Notes: Summary only |
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| Keywords: | TIC Keywords: Application methods; Carbaryl; Cultivar evaluation; Therapeutic control; Disease control; Dollar spot; Drought resistance; Fungicide efficacy; Horticultural oils; Noctuidae; Phytotoxicity
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| Abstract/Contents: | "This trial was conducted at the Joseph Troll Turf Research Center in South Deerfield, MA to evaluate fungicide treatments for curative control of dollar spot under natural disease conditions. The plot consisted of creeping bentgrass (cultivar 'L-93') and annual bluegrass maintained under putting green conditions. Mowing was performed five times per week (0.156-inch cutting height) and clippings were collected. 19-3-19 fertilizer was applied at a rate of 0.5 lb nitrogen (N)/1,000 ft2 on 19 July. Tupersan 50WP was applied 23 May to control crabgrass at a rate of 24 lb/A. Sevin SL was applied at a rate of 4.0 fl oz/1,000 ft2 on 6 Jul to control cutworms. The trial area was irrigated as needed to prevent drought stress. Individual plots measured 3 ft x 6 ft and were arranged in a randomized complete block design with three replications. A severe dollar spot outbreak occurred in June and all treatments were applied curatively. Treatments were initiated on 20 Jun and continued through 31 Jul. All individual treatments were applied at a nozzle pressure of 40 psi using a CO2-pressurized boom sprayer equipped with two XR TeeJet 8004VS nozzles in the equivalent of 2 gallons of water per 1,000 ft2. Dollar spot was rated by counting individual infection centers or using a 1 to 9 rating scale (9=best, 6=acceptable). Turf quality was assessed bi-weekly on a 1 to 9 rating scale (9=best, 6=acceptable) and began after two applications had been applied. Copper spot severity was also determined on a 1-5 rating scale (1=no copper spot, 5=100% copper spot). All disease assessments were subject to an analysis of variance and means were separated using Fisher's LSD test (P < 0.05). Damage from dollar spot and copper spot was observed and rated over the course of the trial. A heavy dollar spot outbreak occurred in late May/early June and therefore a curative trial was initiated. Overall, most treatments that included a fungicide provided significantly better dollar spot control than the untreated by the second rating date (6 Jul). Most treatments that included a systemic fungicide provided acceptable control (> 6) by the final rating date (14 Aug). PAR and Foursome (pigment products) did not control dollar spot when applied alone or improve turf quality compared to the untreated. PAR and Foursome tank-mixed with Daconil Weatherstik produced similar dollar spot control and turf quality results to Daconil Weatherstik applied alone. Civitas + Harmonizer reduced dollar spot, but did not provide an acceptable level of control. Phytotoxicity was observed in the Civitas + Harmonizer + Daconil Weatherstik tank-mix and turf quality was significantly lower than Civitas + Harmonizer applied alone. Significantly increased copper spot damage was observed within the 0.5 oz/1,000 ft2 rate of Velista. Copper severity was similar to the untreated for all rates of IKF-5411, Daconil Weatherstik, Velista (0.3 oz/1,000 ft2), PAR, Foursome, Civitas + Harmonizer, Foursome + Daconil Weatherstik." |
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| Language: | English |
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| References: | 0 |
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| Note: | This item is as abstract and tables only! |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Popko, J., and G. Jung. 2013. Curative dollar spot control on a creeping bentgrass and annual bluegrass putting green, 2012. PDMR: Plant Dis. Manage. Rep. 7:p. T015. |
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| Web URL(s):
https://www.plantmanagementnetwork.org/pub/trial/pdmr/reports/2013/T015.pdf
Last checked: 11/14/2016
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
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