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| Web URL(s): | https://www.plantmanagementnetwork.org/pub/trial/pdmr/reports/2007/T043.pdf
Last checked: 11/14/2016
Requires: PDF Reader |
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| Publication Type:
| Report |
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| Author(s): | Martínez-Espinoza, A. D. |
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| Author Affiliation: | Department of Plant Pathology, University of Georgia, Griffin, Georgia |
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| Title: | Influence of timing of fungicide application in the control of brown patch of tall fescue, 2006 |
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| Source: | PDMR: Plant Disease Management Reports. Vol. 1, 2007, p. T043. |
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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 timing; Fungicide application; Fungicide trials; Fungus control; Brown patch; Festuca arundinacea; Disease severity
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| Cultivar Names: | Lexington |
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| Abstract/Contents: | "A fungicide trial was conducted on a 2-yr-old sward of tall fescue 'Lexington' grown on a clay loam soil (pH 5.8) at the Georgia Experiment Station, Griffin, GA. The objective of the trial was to evaluate the residual effect of Armada as a preventative fungicide treatment to determine if early applications help with brown patch management. Fertilizer treatments consisted of 1.0 lb nitrogen (Lesco 24-4-10) per 1000 sq. ft. applied on 4 Jun and 10 Jul. The turfgrass was maintained at a height of 3-in. by mowing once a week. Turfgrass cultural practices were similar to those prescribed for maintenance of tall fescue lawns in Georgia. Treatments were arranged as plots (4.5 ft x 4.5 ft) in a randomized complete block design with four replications. In Georgia, environmental conditions conducive for brown patch development are typically observed in early to mid Jun. For this experiment Jun 24 was selected as the inoculation date and all treatments (preventative and curative) were made relative to this date. Armada treatments were initiated 6-, 4- and 2-wk, and 1-day before inoculation, as well curatively, 7 days after inoculation. Heritage applications were initiated one day before and seven days after inoculation. A subsequent application was made 28 days post-inoculation. Fungicides were applied with a hand held CO2-pressured boom sprayer at 30 psi using XR TeeJet 8002VS nozzles. R. Solani inoculum was obtained by growing the fungus in a wheat-barley-oat mixture, which was soaked in water overnight and then double sterilized in an Erlenmeyer flask. Turfgrass was inoculated by applying inoculum throughout the entire plot by hand-dispersal of R. solani infested grain on 24 Jun. Plots received 0.1-in. of water daily at 3:00 AM. After inoculation, plots received approximately 0.1-in. of irrigation water 3 times a day for 2 wk at 11:00; 15:00 and 19:00 h to ensure nightly foliar wetness for infection. Normal irrigation was resumed after 14 days. Visual estimates of disease severity were made using the Horsfall-Barratt rating scale. Values were subjected to analysis of variance and means were statistically separated using the Scott-Knott cluster analysis procedure at α = 0.05. Brown patch progressed rapidly in the plots reaching a peak >54% disease severity by Aug 21. All treatments had a significant disease suppressive effect throughout the duration of the trial and were statistically similar (α = 0.05)." |
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| Language: | English |
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| References: | 0 |
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| Note: | This item is as abstract and tables only! |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Martínez-Espinoza, A. D. 2007. Influence of timing of fungicide application in the control of brown patch of tall fescue, 2006. PDMR: Plant Dis. Manage. Rep. 1:p. T043. |
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Last checked: 11/14/2016
Requires: PDF Reader |
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