Full TGIF Record # 124192
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Web URL(s):https://www.plantmanagementnetwork.org/pub/trial/pdmr/reports/2007/T045.pdf
    Last checked: 11/14/2016
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Publication Type:
i
Report
Author(s):Martínez-Espinoza, A. D.
Author Affiliation:Department of Plant Pathology, University of Georgia, Griffin, Georgia
Title:Control of brown patch of tall fescue using granular and liquid fungicides, 2006
Source:PDMR: Plant Disease Management Reports. Vol. 1, 2007, p. T045.
Publishing Information:St. Paul, MN: American Phytopathological Society
# of Pages:1
Keywords:TIC Keywords: Fungus control; Brown patch; Foliar versus granular applications; Festuca arundinacea; Disease severity; Fungicides; Fungicide trials
Cultivar Names:Lexington
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. 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 wk. 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. Initial applications were applied on 9 Jun. Granular fungicides were weighed and at the time of application and they were mixed with sterilized sand which was distributed evenly throughout the experimental plot using a lid-perforated canister. Liquid treatments were mixed with water and sprayed with hand held CO2-pressured boom sprayer at 30 psi using XR TeeJet 8002VS nozzles. Subsequent applications were made at 28 days until 4 Aug. R. solani inoculum was obtained by growing the fungus on a wheat-barley-oats mixture, which was soaked previously in water overnight and then double sterilized in an Erlenmeyer flask. Turf was inoculated after 36 hr after the initial fungicide applications by hand-dispersal of grain infested with Rhizoctonia solani into the foliar canopy. For treatments SP 102000015045 0.6GR 6.0 lb and SP 102000015034 0.5GR 6.0 lb the products were hand-dispersed to dry foliage; product was watered in 24 hrs later. The same products and rates were applied to wet foliage as well. A hand held CO2-pressured sprayer was used to wet the area thoroughly with water prior to the deposition of the product, which was watered-in 24 hr after application. Twenty four hr after the initial irrigation to water-in the products; the plots received approximately 0.1-in. of irrigation water 3 times a day for 2 wk at 11:00, 15:00 and 19:00 hr to ensure nightly foliar wetness for infection. Normal irrigation was resumed during the third wk and it was applied daily at 3:00 hr. Visual estimates of disease severity were made using the Horsfall-Barratt rating scale and translated to percent. Values were subjected to analysis of variance and means were statistically separated using the Scott-Knott cluster analysis procedure. R. solani infection progressed rapidly, reaching a peak of >30% disease severity by 10 Aug. All treatments had a significant disease suppressive effect by 5 Jul. By 21 Aug, Armada 50WP (1.2fl oz); Lynx SC (1.6 fl oz) + Compass 50WG (0.2 oz) and Heritage 50WDG (0.3 oz) had a significant disease suppressive effect. SP 102000015045 0.6GR (6.0 lb applied to dry foliage); SP 102000015045 0.6GR (6.0 lb at 28 days applied to wet foliage); SP 102000015034 0.5GR (6.0 lb applied to dry foliage); and SP 102000015034 0.5GR (6.0 lb applied to wet foliage) provided significant control of the disease also. Granular products were statistically similar to liquid formulations, although liquid formulation had slightly less disease severity. Wet vs dry foliage comparisons were statistically similar, although granular fungicides applied to dry foliage had slightly less disease incidence than granular fungicides applied to wet foliage."
Language:English
References:0
Note:This item is as abstract and tables only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Martínez-Espinoza, A. D. 2007. Control of brown patch of tall fescue using granular and liquid fungicides, 2006. PDMR: Plant Dis. Manage. Rep. 1:p. T045.
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https://www.plantmanagementnetwork.org/pub/trial/pdmr/reports/2007/T045.pdf
    Last checked: 11/14/2016
    Requires: PDF Reader
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