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| Web URL(s): | https://www.plantmanagementnetwork.org/pub/trial/PDMR/reports/2008/T042.pdf
Last checked: 09/12/2017
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| Publication Type:
| Report |
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| Author(s): | Uddin, W.;
Benelli, J.;
Yenez, J. |
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| Author Affiliation: | Department of Plant Pathology, The Pennsylvania State University, University Park, PA |
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| Title: | Evaluation of fungicides for control of Pythium foliar blight in perennial ryegrass, 2007 |
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| Section: | Turfgrass
Other records with the "Turfgrass" Section
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| Source: | PDMR: Plant Disease Management Reports. Vol. 2, 2008, p. T042. |
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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; Fungicide efficacy; Fungicide evaluation; Lolium perenne; Pythium diseases
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| Abstract/Contents: | "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 1.0 lb nitrogen (IBDU) and 1.0 lb nitrogen (18-9-18) and per 1000 sq ft on 5 Jun. Scimitar (7.5 fl oz/A) was applied for cutworms on 8 May. Additionally, 0.5 lb nitrogen (Urea 46-0-0) was applied on 1 Jul and turf area was irrigated (approx. 0.25 inch of water) immediately after application of the fertilizer. Treatment plots, 3 ft Œ 3 ft, were arranged in a randomized complete block design with three replications. Treatments were applied on 3 Jul with a CO2-powered sprayer using a TeeJet 11008E nozzle. Applications were made at 40 psi, in water equivalent to 2 gal per 1000 sq ft. On 5 Jul the experimental turf area was enclosed in a 30 ft Œ 48 ft polyethylene greenhouse to reduce radiational cooling. Turf was inoculated on 5 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. Turf in experimental plot area was not mowed between the time of treatment applications and disease assessments. Disease severity was assessed on 9, 11, 13, and 15 Jul using a disease severity index of 0 to 10 (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 (k=100). Pythium blight foliar blight disease development was rapid under the conducive conditions, and disease severity was extremely high during the course of the experiment. On 9 Jul, all the fungicide treatments provided significant disease control compared to the untreated control. In this assessment, 15 of the 30 treatments provided excellent control with no or trace of Pythium foliar blight development. There was no disease development in plots treated with Alude (10 oz) and tank mixed with Protect (4 oz), cyazofamid at various rates, Agri-Fos (10 oz), Chipco Aliette Signature (4 oz), two confidential materials. There was trace of disease in plots treated with Insignia (9 oz) and Banol (2.2 oz). On 15 Jul, disease pressure was extremely high and turfgrasses in the untreated control plots were completely dead. No phytotoxicity was observed in the experiment on any of the assessment dates." |
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| Language: | English |
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| References: | 0 |
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| Note: | This item is as abstract and tables only!
Tables |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Uddin, W., J. Benelli, and J. Yenez. 2008. Evaluation of fungicides for control of Pythium foliar blight in perennial ryegrass, 2007. PDMR: Plant Dis. Manage. Rep. 2:p. T042. |
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| Web URL(s):
https://www.plantmanagementnetwork.org/pub/trial/PDMR/reports/2008/T042.pdf
Last checked: 09/12/2017
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
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