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Web URL(s): | https://www.plantmanagementnetwork.org/pub/trial/PDMR/reports/2008/T028.pdf Last checked: 09/13/2017 Requires: PDF Reader Access conditions: Item is within a limited-access website |
Publication Type:
| Report |
Author(s): | Kennelly, M. |
Author Affiliation: | Department of Plant Pathology, Kansas State University, Manhattan, KS |
Title: | Evaluation of fungicide applications for control of dollar spot on creeping bentgrass, 2007 |
Section: | Turfgrass Other records with the "Turfgrass" Section
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Source: | PDMR: Plant Disease Management Reports. Vol. 2, 2008, p. TO38. |
Publishing Information: | St. Paul, MN: American Phytopathological Society |
# of Pages: | 1 |
Keywords: | TIC Keywords: Agrostis stolonifera; Disease control; Dollar spot; Fungicide application; Fungicide efficacy; Fungicide evaluation
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Abstract/Contents: | "The experiment was conducted at the Valentine Turfgrass Research Center, University Park, PA, on colonial bentgrass maintained under golf course fairway management conditions, mowed three times per week at 0.5-inch cutting height. The soil was Hagerstown silt loam with pH 6.7. The experimental turf area was fertilized with 1.0 lb nitrogen (IBDU) and 1.0 lb nitrogen (18-9-18) and per 1000 sq ft on 5 Jun. Scimitar (7.5 fl oz/A) was applied for cutworms on 8 May. Additionally, 1.0 lb nitrogen (Urea 46-0-0) was applied on 16 Jul prior to peak period of brown patch activity. Treatment plots, 3 ft Œ 6 ft, were arranged in a randomized complete block design with three replications. Applications were made with a CO2-powered sprayer, using a TeeJet 11008E nozzle, at 40 psi, in water equivalent to 2 gal per 1000 sq ft. The 14-day treatments were applied on 21 Jun, 5 and 19 Jul, 2 and 16 Aug, and 21-day treatments on 21 Jun, 12 Jul, and 2 Aug. Dollar spot incidence was assessed on. 1 Aug and 28 Sep. Data were subjected to analysis of variance and multiple comparisons of the mean values were made using the Waller-Duncan k-ratio test (k=100). Development of dollar spot in the experimental turf area was moderately severe, and it initially appeared in the middle of season. In the first disease assessment, Emerald (0.18 oz), SARS-346 (0.5 or 0.75 oz), SARS-346 (0.4 oz) tank-mixed with 3336 (1.4 or 2 oz), Banner MAXX (2 fl oz), Trinity (1 fl oz), and Daconil Ultrex (3.2 oz) at 14-day interval, and 26/36 (4 fl oz) at 21-day interval provided excellent control. Additionally, Insignia (0.5 oz) provided significant suppression of the disease. There was a notable increase in dollar spot incidence in almost all treatment plots over a period of 4 weeks, and Emerald and SARS-346, and SARS-346 tank-mixed with 3336 were the most effective treatments during the course of this experiment. No phytotoxicity was observed in any of the treatment plots in this experiment. |
Language: | English |
References: | 0 |
Note: | This item is as abstract and tables only! |
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete): Kennelly, M. 2008. Evaluation of fungicide applications for control of dollar spot on creeping bentgrass, 2007. PDMR: Plant Dis. Manage. Rep. 2:p. TO38. |
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