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| Web URL(s): | https://www.plantmanagementnetwork.org/pub/trial/PDMR/reports/2012/T022.pdf
Last checked: 11/14/2016
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
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| Publication Type:
| Report |
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| Author(s): | Earlywine, D.;
Miller, G. L. |
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| Author Affiliation: | Division of Plant Sciences, University of Missouri, Columbia, MO |
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| Title: | Evaluation of fungicides for spring dead spot control on bermudagrass, 2010-2011 |
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| Section: | Turfgrass
Other records with the "Turfgrass" Section
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| Source: | PDMR: Plant Disease Management Reports. Vol. 6, 2012, p. T022. |
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| Publishing Information: | St. Paul, Minnesota: American Phytopathological Society |
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| # of Pages: | 1 |
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| Related Web URL: | https://www.plantmanagementnetwork.org/pub/trial/PDMR/volume6/abstracts/T022.asp
Last checked: 03/14/2017
Notes: Report Summary |
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| Keywords: | TIC Keywords: Cynodon dactylon; Fenarimol; Fungicide evaluation; Ophiosphaerella herpotricha; Spring dead spot; Spring green-up; Tebuconazole; Thiophanate-methyl
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| Cultivar Names: | Riviera |
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| Trade Names: | Torque; Rubigan; 3336 |
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| Abstract/Contents: | "Fungicides were evaluated for the control of a natural infestation of spring dead spot at the University of Missouri Turfgrass Research Facility in Columbia, MO on 'Riviera' bermudagrass. The soil was a Mexico silt loam. Mowing was performed two times weekly at a height of 1.0 in. During the trial period, no fertilizer was applied. Plots were 5 ft x 10 ft and arranged in a randomized complete block with four replications. Treatments were applied in fall 2010 in water equivalent to 2.0 gal per 1000 sq ft with a CO2-powered sprayer at 25 psi using TeeJet 8008 nozzles. Fungicides were watered-in immediately after application with 0.2-in. of irrigation. Disease severity and turfgrass quality were assessed every 7 to 14 days from initial symptom development. Disease severity was assessed as estimates of the percent symptomatic area. Turfgrass quality was evaluated using a 1 to 9 scale (9=best, 5=acceptable) based on color, density, and uniformity. Turf yellowing was evaluated on a 0 to 5 scale (0=common dormant bermudagrass color, 5=bright yellow/straw colored dormant bermudagrass). Spring greenup ratings were based on a scale of 0 to 9 (0=complete dormant turfgrass, 9=complete turfgrass greenup). Data were subjected to analysis of variance and means separation by Waller-Duncan k-ratio t-test (k=100). In late February, pronounced yellowing was observed in dormant bermudagrass plots treated with Torque. No phytotoxicity was observed following application. The reason for this yellow effect is unknown. Spring greenup in plots treated with the high rate of Torque was only slower in early May, but the effect was not statistically significant compared to other treatments. There were no statistical differences in spring dead spot severity among the treatments in this study. On the 19 May rating date, plots treated with either a single spring application of 3336F or two spring Rubigan applications reduced spring dead spot severity by 42% and 20% respectively compared to untreated plots. A multi-year approach and more frequent fungicide applications may be necessary for controlling spring dead spot at this site." |
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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):
Earlywine, D., and G. L. Miller. 2012. Evaluation of fungicides for spring dead spot control on bermudagrass, 2010-2011. PDMR: Plant Dis. Manage. Rep. 6:p. T022. |
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| Web URL(s):
https://www.plantmanagementnetwork.org/pub/trial/PDMR/reports/2012/T022.pdf
Last checked: 11/14/2016
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
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