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| Web URL(s): | https://www.plantmanagementnetwork.org/pub/trial/PDMR/reports/2011/T014.pdf
Last checked: 11/11/2016
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| Publication Type:
| Report |
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| Author(s): | Aynardi, B.;
Rahman, A.;
Li, Y.;
Uddin, W. |
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| Author Affiliation: | Department of Plant Pathology, The Pennsylvania State University, University Park, PA |
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| Title: | Effect of fungicides on the severity of spring leaf spot/melting out in Kentucky bluegrass, 2010 |
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| Section: | Turfgrass
Other records with the "Turfgrass" Section
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| Source: | PDMR: Plant Disease Management Reports. Vol. 5, 2011, p. T014. |
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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; Leaf spot; Melting out; Poa pratensis
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| Cultivar Names: | Park |
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| Abstract/Contents: | "The experiment was conducted at the Valentine Turfgrass Research Center, University Park, PA. The stand of Kentucky bluegrass was mowed three times per week at a height of 2-in, and rested atop Hagerstown silt loam soil with a pH of 6.8. The test area was not fertilized prior to the study, nor during the course of the experiment. Treatment plots, 3 ft x 6 ft, were arranged in a randomized complete block design with three replications. Fungicides were applied with a CO2-powered sprayer, using a TeeJet 11008E nozzle at 40 psi, with a water carrier equivalent to 2 gal per 1000 sq ft. Fungicide applications were made on 20 Apr, 4 and 19 May, and 1, 15 and 28 Jun on a 14-day interval. Disease severity (index 0-10; 0=turf asymptomatic; 10=>=90% turf area symptomatic) was assessed on 3 Jun, and subsequent assessments were made on 10, 17, and 24 Jun, and 1 and 8 Jul. Data were subjected to analysis of variance, and the mean values were separated using the Waller-Duncan k-ratio Test (P<=0.05). Spring leaf spot development in the Kentucky bluegrass in the experimental area was slightly delayed due to dry conditions. Therefore, daily irrigation was applied to promote disease development. Disease severity data were collected in early June when disease severity reached moderate levels (>5.0). Disease severity progressed rapidly during the latter part of June, exceeding 6.3 by the end of the month. In the first assessment of disease severity on 3 Jun, several fungicides applied at 14-day intervals provided good control of the disease. They included Civitas with harmonizer, their tank-mix with low rates of Heritage and Daconil Ultrex, and Insignia and Tartan. However, some of the products did not sustain the efficacy satisfactorily over time when disease pressure significantly increased during the later part of the experiment. No phytotoxicity was observed in any of the treatment plots during the course of the experiment." |
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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):
Aynardi, B., A. Rahman, Y. Li, and W. Uddin. 2011. Effect of fungicides on the severity of spring leaf spot/melting out in Kentucky bluegrass, 2010. PDMR: Plant Dis. Manage. Rep. 5:p. T014. |
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| Web URL(s):
https://www.plantmanagementnetwork.org/pub/trial/PDMR/reports/2011/T014.pdf
Last checked: 11/11/2016
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
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