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| Web URL(s): | https://www.plantmanagementnetwork.org/pub/trial/pdmr/reports/2009/T079.pdf
Last checked: 11/11/2016
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): | Martínez-Espinoza, A. D.;
Youmans, J. |
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| Author Affiliation: | Department of Plant Pathology, University of Georgia, Griffin, Georgia |
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| Title: | Efficacy of fungicides for control of pythium blight on tall fescue, 2008 |
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| Source: | PDMR: Plant Disease Management Reports. Vol. 3, 2009, p. T079. |
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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: Disease control; Disease severity; Festuca arundinacea; Fluopicolide + Propamocarb; Fosetyl Al; Fungicide efficacy; Fungicide evaluation; Metalaxyl-M; Pyraclostrobin; Pythium aphanidermatum; Rhizoctonia solani
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| Cultivar Names: | Kentucky 31 |
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| Trade Names: | Stellar; Insignia 20WDG; Aliette; Subdue MAXX |
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| Abstract/Contents: | "A fungicide trial was conducted on a 7-year-old sward of tall fescue cv. "Kentucky 31" grown on a clay loam soil (pH 5.8) at the Georgia Experiment Station, Griffin, GA. Fertilizer treatments consisted of 1.0 lb nitrogen (Lesco 24-4-10) per 1,000 sq ft applied on 9 Jun and 7 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 (5 ft x ft) in a randomized complete block design with four replications. Initial applications were applied on 2 Jul 08. Treatments were sprayed in 2.5 gal water per 1,000 sq ft with a hand held, CO2-pressured boom sprayer at 30 psi using XR TeeJet 800 2vs nozzles. Subsequent applications were made at 14 days depending on the treatment. A total of 5 applications were made. Pythium aphanidermatum inoculum was obtained by growing the fungus in a wheat-barley-oats mixture, which was soaked in water overnight and then double sterilized in an Erlenmeyer flask. Turf was inoculated 24 hr after the initial fungicide applications by hand-dispersal of grain infested with P. aphanidermatum into the turf canopy. The plots received approximately 0.1 in. of irrigation water daily 3 times a day (11:00 AM; 3:00 PM and 7:00 PM) for 3 weeks to ensure nightly foliar wetness for infection for 3 weeks. Normal irrigation was resumed daily at 3:00 AM after the first 21 days. Two applications of flutalonil (Prostar at 2.0 oz/1,000 sq ft) were made at 21- day intervals to avoid infections of Rhizoctonia solani. Visual estimates of disease severity were made using a modified version of the Horsfall-Barratt rating scale. Values were subjected to analysis of variance and means were statistically separated using Fisher's protected LDS at α=0.05. Overall infection of P. aphanidermatum was low throughout the experiment. Later in the season Pythium blight incidence reached a peak >14% by 29 August. This was probably due to cooler than expected environmental conditions during the duration of the trial and especially in the month of August. All treatments showed significant disease suppressive effect for the duration of the study. All treatments gave statistically significant better turf quality than the control. No phytotoxicity was observed with any of the treatments." |
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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):
Martínez-Espinoza, A. D., and J. Youmans. 2009. Efficacy of fungicides for control of pythium blight on tall fescue, 2008. PDMR: Plant Dis. Manage. Rep. 3:p. T079. |
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| Web URL(s):
https://www.plantmanagementnetwork.org/pub/trial/pdmr/reports/2009/T079.pdf
Last checked: 11/11/2016
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
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