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| Web URL(s): | https://www.plantmanagementnetwork.org/pub/trial/PDMR/reports/2012/T041.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): | Richardson, M. D.;
McCalla, J. H.;
Karcher, D. E.;
Spurlock, T. N. |
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| Author Affiliation: | Richardson, McCalla, and Karcher: Dept. of Horticulture; Spurlock: Dept. of Plant Pathology, University of Arkansas, Fayetteville, AR |
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| Title: | Fungicidal control of large patch on 'El Toro' zoysiagrass in Arkansas, 2010 to 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. T041. |
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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: | http://www.plantmanagementnetwork.org/pub/trial/PDMR/volume6/abstracts/T041.asp
Last checked: 04/30/2012
Access conditions: Document is within a limited-access website
Notes: Summary only |
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| Keywords: | TIC Keywords: Azoxystrobin; Flutolanil; Inoculation; Penthiopyrad; Pyraclostrobin; Rhizoctonia blight; Rhizoctonia solani; Triticonazole; Zoysia japonica
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| Cultivar Names: | El Toro |
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| Trade Names: | Heritage; Prostar; Trinity; Pillar; Velista; Insignia |
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| Abstract/Contents: | " Several fungicides were evaluated for control of large patch on an established stand of Zoysia japonica ('El Toro') at the University of Arkansas, Agricultural Research and Extension Center in Fayetteville AR. Plots were maintained under simulated golf course fairway conditions, with a mowing height of 0.5-in., irrigation applied to replace 100%ET, and nitrogen fertilizer applied at a rate of 3.0 lb. N / 1,000 ft2 for the entire growing season. Immediately prior to fungicide applications, each plot was inoculated with two isolates of R. solani that had been cultured on sterile oats for 4 weeks prior to inoculation. A small plug (2-in. diameter and 1-in. depth) was removed from the turf, and 1 tablespoon of infested oat seeds was placed in the hole, and the turf replaced. Each isolate was inoculated into separate spots, three feet apart, within the plot. Initial fungicide applications were made on 21 Sep 2010 and repeat applications were made for specific treatments on 20 Oct 2010 and 24 Mar 2011. All fungicides, except Pillar, were applied with a CO2-powered sprayer in 30 gal/A water at an operating pressure of 32 psi using 8002 flat-fan nozzles. Pillar was a granular product that was applied using a shaker can to distribute the material evenly over the plots. Plot size for each treatment was 4 x 10 ft, and each treatment was replicated four times in a randomized complete block design. Within each block, two untreated control (check) plots were included, and data for check plots were averaged within each rep prior to statistical analysis. Plots were visually rated for disease incidence (% infected area) at least monthly throughout the fall and spring period. The inoculation method was successful and heavy disease pressure was observed in these plots during both the fall and spring periods. By the end of the fall disease period (29 Nov) and prior to full dormancy, the untreated check plots had over 50% large patch incidence while the check treatments had over 68% large patch at the end of the spring period (6 May). All treatments provided satisfactory protection from large patch during the fall, and all treatments also provided good control in the early spring (31 Mar) evaluations. On the 15 Apr evaluation date, the single application of Velista at 0.7 oz began to lose efficacy. On the final evaluation date (6 May), both of the Velista treatments that were applied once in early fall had lost efficacy and were not different from the check plots. Several treatments provided good season-long control including Heritage, Prostar, Trinity, Pillar and multiple applications of Velista. No phytotoxicity was apparent with any of these treatment combinations." |
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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):
Richardson, M. D., J. H. McCalla, D. E. Karcher, and T. N. Spurlock. 2012. Fungicidal control of large patch on 'El Toro' zoysiagrass in Arkansas, 2010 to 2011. PDMR: Plant Dis. Manage. Rep. 6:p. T041. |
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| Web URL(s):
https://www.plantmanagementnetwork.org/pub/trial/PDMR/reports/2012/T041.pdf
Last checked: 11/14/2016
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
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