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| Web URL(s): | https://www.plantmanagementnetwork.org/pub/trial/fntests/reports/2000/55-497.pdf
Last checked: 05/03/2017
Requires: PDF Reader |
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| Publication Type:
| Report |
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| Author(s): | Harmon, P.;
Tikhonova, I.;
Latin, R. |
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| Author Affiliation: | Department of Botany and Plant Pathology, Purdue University, West Lafayette, Indiana |
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| Title: | Evaluation of fungicides for control of dollar spot on creeping bentgrass, 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. 497. |
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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; Quality; Agrostis stolonifera; Dollar spot; Sclerotinia homoeocarpa; Fungicide evaluation; Fungicides; Fungicide combinations; Golf greens
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| Cultivar Names: | Pennlinks |
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| Abstract/Contents: | "The research was conducted at the Purdue University Daniel Turfgrass Research and Diagnostic Center in West Lafayette, IN. The experimental site was a stand of Pennlinks creeping bentgrass maintained at a height of 0.25 in. Fertilization, irrigation, aerification, and topdressing, were done according to standard practices for creeping bentgrass at putting green height. During the course of the experiment, nitrogen fertilizer (18-4-10) was applied at a rate of 1 lb N per 1000 sq ft on 28 May, 15 Jun, and 20 Jul. Individual treatment plots measured 3.3 ft by 6.6 ft and were randomized within each of the 4 replications. Disease was allowed to develop from natural inoculum. Fungicide applications were made using a custom-built bicycle wheel boom sprayer. Three nozzles (Tee-Jet 8004 EVS, flat fan) were mounted approximately 12 in. apart on a boom located 12 in. from the ground. The sprayer was calibrated to deliver 2 gal per 1000 sq ft at 40 psi. Treatments with 14-day spray intervals were applied 09 Jun, 23 Jun, 07 Jul, 21 Jul, and 04 Aug. The treatment with 21-day spray intervals was applied 09 Jun through 04 Aug. The plots were evaluated for dollar spot visually at 4-7 day intervals from 11 Jun to 13 Aug. The dollar spot infection centers were counted through July. The August evaluations were recorded using the Horsfall Barratt (HB) scale to estimate the proportion of symptomatic plot area. The HB values were converted to disease percentages and transformed to arc sin square root. Analysis of variance and mean separation procedures were performed on the transformed data. Dollar spot disease pressure remained unusually high throughout the entire time of this trial. Prior to fungicide application, the number of disease centers per plot ranged from 993 to 395. Within 2 weeks of the initial fungicide sprays, dollar spots were reduced to zero in several plots. Two of the treatments (Chipco Signature 80WG and Turfcide 400 F) resulted in unacceptable levels of control. Turf quality was evaluated visually using a 0-9 scale (less than 5 is unacceptable). Because of the severe early season dollar spot damage, contact fungicides such as Fore 80W and Daconil Ultrex 82.5WDG did not result in acceptable quality turf as expected, although they resulted in significantly less dollar spot than the untreated control plots at all evaluation dates except the first. No phytotoxicity was associated with any of the treatments." |
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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):
Harmon, P., I. Tikhonova, and R. Latin. 2000. Evaluation of fungicides for control of dollar spot on creeping bentgrass, 1999. Fungicide Nematicide Tests. 55:p. 497. |
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| If there are problems with this record, send us feedback about record 70044. |
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| Web URL(s):
https://www.plantmanagementnetwork.org/pub/trial/fntests/reports/2000/55-497.pdf
Last checked: 05/03/2017
Requires: PDF Reader |
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MSU catalog number: SB 951.3 .F82 |
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