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| Web URL(s): | http://www.plantmanagementnetwork.org/pub/trial/pdmr/volume3/abstracts/t18.asp
Last checked: 09/18/2009
Notes: Report Summary
https://www.plantmanagementnetwork.org/pub/trial/pdmr/reports/2009/T018.pdf
Last checked: 11/11/2016
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Access conditions: Item is within a limited-access website |
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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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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: | Evaluation of granular and liquid fungicides for control of brown patch of tall fescue in Georgia, 2007 |
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| Section: | Turfgrass
Other records with the "Turfgrass" Section
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| Source: | PDMR: Plant Disease Management Reports. Vol. 3, 2009, p. T018. |
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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; Festuca arundinacea; Foliar versus granular applications; Fungicide efficacy; Fungicide evaluation; Rhizoctonia blight; Rhizoctonia solani
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| Cultivar Names: | Kentucky 31 |
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| Geographic Terms: | Georgia |
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| Abstract/Contents: | "A fungicide trial was conducted on a 5-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 on 1.0 lb nitrogen (Lesco 24-4-10) per 1000 sq ft applied on 7 Jun and 6 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 5 ft) in a randomized complete block design with four replications. Initial applications were applied on 20 Jun, 2007. Granular formulations were weighed and at the time of application, mixed with sterilized sand which was contained in a perforated-lid canister. Fungicide was distributed evenly throughout the experimental plot. Liquid treatments were mixed with water and sprayed in 2.5 gal water per 1000 sq ft with a hand held, CO2-pressured boom sprayer at 30 psi using XR TeeJet 800 2vs nozzles. Subsequent applications were made at 28 day intervals (18 Jul and 15 Aug). Rhizoctonia solani 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 Earlenmayer flask. Turf was inoculated 24 hours after the initial fungicide applications by hand-dispersal of grain infested with R. solani into the foliar 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) to ensure nightly foliar wetness for infection for 3 weeks. Hot and dry conditions observed during the conduction of the experiment required us to implement this irrigation schedule. Normal irrigation was resumed daily at 3:00 AM after the first 21 days. 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 LSD (P= 0.05). Rhizoctonia solani infection progressed slowly at the beginning of the experiment. However, later in the season brown patch incidence progressed rapidly, reaching a peak >70% disease severity by 21 August. Environmental conditions remain hot and dry well into September. Granular formulations of Armada had a significant disease suppressive effect for the duration of the study, especially later in the season when brown patch conditions were favorable. Armada 0.6G at 8 lb had higher disease suppression than the 6 lb rate. Armada 0.6G 6 lbs kept the disease under 6% under strong disease pressure. Armada 50WP at 1.5 oz had the highest disease suppression followed by Armada WP1.2 oz and Heritage WG0.3 oz. Overall granular products suppressed disease as well as the liquid products with few statistically significant differences, although liquid formulations had numerically less disease on most rating dates." |
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| Language: | English |
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| References: | 0 |
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| Note: | This item is an abstract only!
Tables |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Martínez-Espinoza, A. D. 2009. Evaluation of granular and liquid fungicides for control of brown patch of tall fescue in Georgia, 2007. PDMR: Plant Dis. Manage. Rep. 3:p. T018. |
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| Web URL(s):
http://www.plantmanagementnetwork.org/pub/trial/pdmr/volume3/abstracts/t18.asp
Last checked: 09/18/2009
Notes: Report Summary
https://www.plantmanagementnetwork.org/pub/trial/pdmr/reports/2009/T018.pdf
Last checked: 11/11/2016
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
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