Full TGIF Record # 155277
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Web URL(s):http://www.plantmanagementnetwork.org/pub/trial/pdmr/volume3/abstracts/t54.asp
    Last checked: 07/10/2013
    Access conditions: Item is within a limited-access website
    Notes: Report Summary
https://www.plantmanagementnetwork.org/pub/trial/pdmr/reports/2009/T054.pdf
    Last checked: 11/11/2016
    Requires: PDF Reader
    Access conditions: Item is within a limited-access website
Publication Type:
i
Report
Author(s):Uddin, W.; Benelli, J.
Author Affiliation:Department of Plant Pathology, The Pennsylvania State University, University Park, Pennsylvania
Title:Evaluation of fungicides for control of Pythium foliar blight in perennial ryegrass, 2008
Source:PDMR: Plant Disease Management Reports. Vol. 3, 2009, p. T054.
Publishing Information:St. Paul, MN: American Phytopathological Society
# of Pages:1
Keywords:TIC Keywords: Disease control; Disease severity; Fungicide efficacy; Fungicide evaluation; Lolium perenne; Pythium aphanidermatum
Cultivar Names:Legacy II
Abstract/Contents:"The The study was conducted at the Valentine Turfgrass Research Center, University Park, PA, on perennial ryegrass maintained under golf course fairway management conditions, and mowed three times per week at 1.0-in. cutting height. The soil was Hagerstown silt loam with pH 6.8. The experimental turf area was fertilized with 0.5 lb nitrogen (Urea 46-0-0) on 25 May, 1 lb nitrogen (18-9-18) on 3 May, and 1 lb nitrogen (Urea 46-0-0) per 1,000 sq ft on 6 Jun. Treatment plots, 3 ft x 3 ft, were arranged in a randomized complete block design with three replications. The experimental turf area was enclosed in a 30 ft x 48 ft polyethylene greenhouse on 11 Jul to maintain adequate heat and humidity for disease development. Treatments were applied on 12 Jul with a CO2-powered sprayer using a TeeJet 11008E nozzle. Applications were made at 40 psi, in water equivalent to 2 gal per 1,000 sq ft. Turf was inoculated on 14 Jul with a spore and mycelial suspension of a five-isolate pool of Pythium aphanidermatum. An internal intermittent misting system provided high relative humidity and leaf surface wetness during the course of the study. The greenhouse was vented during daylight hours to maintain a temperature range of 85° to 100°F. Vents were closed during the evenings and nights. Disease severity was assessed on 19, 20, 21, 22, 23, and 24 Jul using a 0 to 10 index (0=turf asymptomatic; 10=>90% turf area symptomatic). Data were subjected to analysis of variance and multiple comparisons of the mean values were made using the Waller-Duncan k-ratio test. Pythium blight foliar blight disease development was rapid under the conducive conditions, and symptom developed within 3 days after inoculation. Disease severity was extremely high during the course of the experiment. In first assessment on 19 Jul, the index was 4.3 in untreated control plots. On 19 Jul, 18 of the 34 treatments provided excellent control with no Pythium foliar blight development. Most of these treatments maintained the efficacy throughout the study with less than 10% of the plots blighted even under high disease pressure during the later part of the assessment period. Overall, Heritage TL, SARS-409, Protect tank-mixed with Alude, Segway (cyazofamid) applied at various rates or tank-mixed with Alude, Insignia, Subdue MAXX, Chipco Signature, ARY-0534003, Banol, and Disarm (at high and low rates), provided good to excellent control of the disease. On 24 Jul, disease pressure was extremely high and the severity in untreated control plots was approaching Index 9, and the experiment was terminated. No phytotoxicity was observed in the experiment on any of the assessment dates."
Language:English
References:0
Note:Tables
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Uddin, W., and J. Benelli. 2009. Evaluation of fungicides for control of Pythium foliar blight in perennial ryegrass, 2008. PDMR: Plant Dis. Manage. Rep. 3:p. T054.
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Web URL(s):
http://www.plantmanagementnetwork.org/pub/trial/pdmr/volume3/abstracts/t54.asp
    Last checked: 07/10/2013
    Access conditions: Item is within a limited-access website
    Notes: Report Summary
https://www.plantmanagementnetwork.org/pub/trial/pdmr/reports/2009/T054.pdf
    Last checked: 11/11/2016
    Requires: PDF Reader
    Access conditions: Item is within a limited-access website
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