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Web URL(s): | https://www.plantmanagementnetwork.org/pub/trial/fntests/reports/2006/T037.pdf Last checked: 11/14/2016 Requires: PDF Reader |
Publication Type:
| Report |
Author(s): | Tredway, L. P.;
Butler, E. L. |
Author Affiliation: | Department of Plant Pathology, North Carolina State University, Raleigh, North Carolina |
Title: | Curative control of gray leaf spot in tall fescue landscapes, 2005 |
Section: | Turfgrass Other records with the "Turfgrass" Section
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Source: | F&N Tests. Vol. 61, 2006, p. T037. |
Publishing Information: | St. Paul, MN: American Phytopathological Society |
# of Pages: | 1 |
Keywords: | TIC Keywords: Festuca arundinacea; Gray leaf spot; Disease control; Disease severity; Application rates; Application timing; Landscape
|
Cultivar Names: | Confederate |
Abstract/Contents: | "Fungicides were evaluated for their curative effect on gray leaf spot development in tall fescue. This trial was conducted at the Lake Wheeler Turfgrass Field Laboratory in Raleigh, NC on 'Confederate' tall fescue maintained under landscape conditions. Mowing was performed 2 times weekly at a height of 3-in. with clippings returned, and the site was irrigated to prevent drought stress. Fertilizer was applied as 25-6-12 on 21 Feb and 21 Mar to deliver 1 lb nitrogen/1000 sq ft. Annual grasses were controlled with Barricade 65WDG on 21 Feb (0.5 lb a.i./A) and 18 Apr (0.25 lb a.i./A). The experimental area was naturally infested with the gray leaf spot pathogen and was not artificially inoculated. Plots were 5 ft x 6 ft and were arranged in a randomized complete block with four replications. Fungicides were applied in water equivalent to 3 gal per 1000 sq ft with a CO2-powered sprayer at 40 psi using TeeJet 8004 nozzles. All treatments were applied on 24 Aug and 20 Sep. Percent turf area exhibiting gray leaf spot symptoms was assessed on 24 Aug, 2 Sep, 15 Sep, and 3 Oct. The Henderson-Tilton transformation in ARM 7 (Gylling Data Management, Inc., Brookings, SD), was used to estimate percent disease control based on the pre-treatment assessment on 24 Aug. Raw and transformed data were subjected to analysis of variance and means separation by Waller-Duncan k-ratio t test (k=100). Disease incidence ranged from 11% to 25% prior to initiation of fungicide treatments on 24 Aug, but no significant differences were detected among treatments. Fungicides had no significant effect on 2 Sep and 15 Sep, but all treatments except CL-EXP-4 and CL-EXP-6 significantly reduced disease incidence on 3 Oct compared to the untreated control. According to Henderson-Tilton transformed data, Insignia (0.9 oz), Bayleton (1 oz), Banner Maxx (2 fl oz), Armada (1.2 oz), Systar (3 oz), and 3336 (6 fl oz) provided the most rapid curative suppression on 2 Sep. Few significant differences were detected among treatments on 15 Sep. On 3 Oct, 13 days after the second application, Heritage 50WG (0.4 oz), Heritage TL (2 fl oz), Insignia (0.9 oz), Compass (0.25 oz), Armada (1.2 oz), Heritage TL + Banner Maxx (2 + 2 fl oz), 3336 (6 fl oz), and 3336 Plus (6 fl oz) provided the highest percent control according to this transformation." |
Language: | English |
References: | 0 |
Note: | Tables |
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete): Tredway, L. P., and E. L. Butler. 2006. Curative control of gray leaf spot in tall fescue landscapes, 2005. F&N Tests. 61:p. T037. |
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| Web URL(s): https://www.plantmanagementnetwork.org/pub/trial/fntests/reports/2006/T037.pdf Last checked: 11/14/2016 Requires: PDF Reader |
| MSU catalog number: SB 951.3 .F82 |
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