Full TGIF Record # 63257
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Publication Type:
i
Report
Author(s):Uddin, W.; Soika, M. D.
Author Affiliation:Department of Plant Pathology, The Pennsylvania State University, University Park, PA
Title:Evaluation of fungicides for control of pythium foliar blight, 1998
Source:Fungicide and Nematicide Tests. Vol. 54, 1999, p. 520.
Publishing Information:St. Paul, MN: American Phytopathological Society
# of Pages:1
Keywords:TIC Keywords: Lolium perenne; Pythium diseases; Pythium aphanidermatum; Disease control; Fungicide evaluation; Application rates; Tank mix; Disease severity; Trifloxystrobin; Azoxystrobin; Propamocarb; Metalaxyl
Cultivar Names:Pennfine
Abstract/Contents:"The study was conducted at the Landscape Management Research Center, University Park, PA, on perennial ryegrass, maintained under golf course fairway management conditions, mowed three times per week at 0.5" cutting height. The soil was Hagerstown silt loam with soil pH of 6.9. Dimension 1EC (1.0 fl oz/1000 sq ft) was applied on 1 May for control of crabgrass. The experimental area was fertilized on 18 May with 1.0 lb nitrogen (Scotts 18-9-18) per 1000 sq ft, 5 Jun with 0.5 lb nitrogen (Lebanon 28-7-14) per 1000 sq ft, and on 29 Jun with 1.0 lb nitrogen (Country Club 18-5-9) per 1000 sq ft. Fungo 4.5F and Dyrene 4F were applied at 2.0 and 8.0 fl oz respectively per 1000 sq ft on 23 Jun, and Lesco Benomyl 50 WP (2.0 oz/1000 sq ft) on 3 Jul for control of brown patch. Treatment plots, 3 ft x 7 ft, were arranged in a randomized complete block design with three replications. Fungicides were applied on 7 Jul with a CO₂-powered boom sprayer, using TeeJet 8004 nozzles, at 40 psi, in water equivalent to 2 gal per 1000 sq ft. The experimental turf area was inoculated on 9 Jul, two days after treatment (DAT), with mycelial suspension of a 6-isolate pool pf Pythium aphanidermatum. Following inoculation, the area was enclosed in a 30 ft x 48 ft polyethylene greenhouse to minimize radiational cooling at night. The greenhouse was vented during daylight hours to maintain a temperature range of 85^DG to 95^DGF, and closed at night. An internal intermittent misting system provided continuous high relative humidity and leaf surface wetness. These conditions were conducive for infection and disease development, therefore disease severity was high. On 16 Jul (9 days after treatment) the blighted turf areas on individual plot treatments were assessed. Data were subjected to analysis of variance, and the mean values were separated by Duncan's New Multiple Range Test (P=0.05). Both combination treatments of Compass + Subdue Maxx, Banol C, and Subdue Maxx alone provided good control of Pythium foliar blight at 9 days after treatment. No statistical differences were obtained from the addition of Compass to the 0.5 fl oz rate of Subdue Maxx in this field study."
Language:English
References:0
See Also:Other items relating to: Foliar Feeding & Uptake
Note:Tables
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Uddin, W., and M. D. Soika. 1999. Evaluation of fungicides for control of pythium foliar blight, 1998. Fungicide Nematicide Tests. 54:p. 520.
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