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Web URL(s): | https://www.plantmanagementnetwork.org/pub/trial/pdmr/reports/2013/T004.pdf Last checked: 11/14/2016 Requires: PDF Reader Access conditions: Item is within a limited-access website |
Publication Type:
| Report |
Author(s): | Vincelli, P.;
Dixon, E.;
Williams, D. |
Author Affiliation: | Vincelli and Dixon: Dept. of Plant Pathology; Williams: Dept. of Plant and Soil Science, University of Kentucky, Lexington, KY |
Title: | Efficacy of fungicides for control of dollar spot in a mixed creeping bentgrass/Poa annua soil-based green, 2012 |
Section: | Turfgrass Other records with the "Turfgrass" Section
|
Source: | PDMR: Plant Disease Management Reports. Vol. 7, 2013, p. T004. |
Publishing Information: | St. Paul, Minnesota: American Phytopathological Society |
# of Pages: | 2 |
Related Web URL: | http://www.plantmanagementnetwork.org/pub/trial/PDMR/volume7/abstracts/T004.asp Last checked: 04/03/2013 Access conditions: Document is within a limited-access website Notes: Summary only |
Keywords: | TIC Keywords: Acibenzolar-s-methyl + chlorothalonil; Cultural methods; Dollar spot; Fungicide evaluation; Fungicide application; Loam soils; Penthiopyrad; Phototoxicity; Poa annua
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Trade Names: | Briskway; Appear; Daconil Action; Velista; Secure |
Abstract/Contents: | "The study was conducted on a Maury silt loam located at the University of Kentucky Turf Research Center near Lexington. The turf was maintained at 0.188-in. mowing height and fertilized with 18-9-18 at the rate of 1.0 lb N/1,000 sq ft on 12 Sep 11, 1.5 lb N/1,000 sq ft on 10 Oct 11 and 1.0 lb N/1,000 sq ft as 46-0-0 on 20 Apr 12. Plots measured 4 ft x 4 ft with 2-ft borders and were arranged in a randomized complete-block design with three replications per treatment. Fungicide sprays were applied using a CO2-pressurized hand-held sprayer fitted with Spraying Systems 8003E flat-fan nozzles delivering 1.5 gal/1,000 sq ft. Fungicide treatments were first applied on 2 May, after dollar spot was first detected in late April, with the remaining treatments applied according to the spray intervals indicated in the table (final application on 31 Jul). Daconil Action, Briskway, Appear, Secure and Velista treatments were not applied for the first time until 16 May. Where tank-mixes were rotated, sprays were applied every two weeks, with each tank-mix being applied once every four weeks. Visual quantification of dollar spot infection centers was performed weekly. The level of infestation by Poa annua was visually estimated on 2 May, when color differences between the two grass species and the presence of P. annua seed heads facilitated discrimination. The amount of P. annua per plot averaged 38 percent and did not differ significantly between treatments. Transformed data (log10) were analyzed using ANOVA (alpha=0.05) and Waller-Duncan k-ratio t-test (k=100). Although statistics provided are based on analysis of transformed data, arithmetic means are presented in order to provide a better indication of the level of disease control provided by each treatment as well as the overall disease pressure in the trial. Disease pressure was low to moderate in this test. Most treatments provided acceptable control of dollar spot for most of the duration of the test, with the exception of TeraGanix EM-1 and AG1000. The addition of TeraGanix EM-1 or AG1000 biological fungicide to the Daconil Ultrex 1.6 oz treatment did not significantly improve dollar spot control. Since Daconil Action, Briskway, Appear, Secure and Velista treatments were not applied until 16 May the data before that date should not be used for evaluation of these compounds. There were no growth regulator or phytotoxic effects observed during this study." |
Language: | English |
References: | 0 |
Note: | This item is as abstract and tables only! |
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete): Vincelli, P., E. Dixon, and D. Williams. 2013. Efficacy of fungicides for control of dollar spot in a mixed creeping bentgrass/Poa annua soil-based green, 2012. PDMR: Plant Dis. Manage. Rep. 7:p. T004. |
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