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| Web URL(s): | https://www.plantmanagementnetwork.org/pub/trial/PDMR/reports/2008/T018.pdf
Last checked: 11/14/2016
Requires: PDF Reader |
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| Publication Type:
| Report |
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| Author(s): | Soika, M. D.;
Tredway, L. P. |
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| Author Affiliation: | Department of Plant Pathology, North Carolina State University, Raleigh, NC |
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| Title: | Evaluation of fungicides for control of Pythium foliar blight in tall fescue, 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. T018. |
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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; Festuca arundinacea; Fungicide efficacy; Fungicide evaluation; Pythium aphanidermatum; Pythium diseases
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| Cultivar Names: | Southern Gold |
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| Abstract/Contents: | "Wheeler Turfgrass Field Lab in Raleigh, NC on a Southern Gold tall fescue blend that was seeded on 14 May (20 lb seed/1000 sq ft) and maintained under home lawn conditions. The turf was mowed once weekly at a height of 3.5 in. with clippings returned, and the site was irrigated to prevent drought stress. Fertilizer was applied as 25-6-12 on 14 Jul (0.75 lb N/1000 sq ft). ProStar (2.2 oz/1000 sq ft) was applied on 8 and 29 Jun and 13 Jul for control of brown patch. 3336 Plus (6.0 fl oz/1000 sq ft) was applied on 22 Jun and 13 Jul for control of gray leaf spot. Daconil Ultrex (3.2 oz/1000 sq ft) was applied on 30 Jul and 17 Aug for control brown patch and gray leaf spot. Drive 75DF + methylated seed oil (1 lb /A + 1 qt/A) was applied on 16 and 30 Jul for post emergent control of crabgrass. Plots were 5 ft x 5 ft and were arranged in a randomized complete block with three replications. Fungicides were applied in water equivalent to 2 gal per 1000 sq ft with a CO2-powered sprayer at 40 psi using TeeJet 8004 nozzles. All treatments were initiated on 21 Jun due to early symptom development. Fungicides were reapplied on 17 Jul and on 14-day intervals thereafter. The experimental area was inoculated on 9 Jul using rye grain infested with P. aphanidermatum isolates PyAp1, PyAp2, PyAp3, PyAp4, and PyAp5 to encourage uniform disease development. After inoculation, the study was irrigated with 0.13 in. water daily at 8:00 hr and 20:00 hr to produce environmental conditions conducive to disease development. Percent turf area exhibiting foliar blight symptoms was assessed on 23 Jul, and 1, 14, and 28 Aug. Data were subjected to analysis of variance (α=0.05) and means separation by Waller-Duncan k-ratio t-test (k=100). Weather conditions were hot and abnormally dry throughout the trial. Only 0.2 in. of rain fell between 13 Jun and 10 Jul. Between 10 Jul and 21 Aug, 3.8 in. of precipitation was recorded, with 3.0 in. falling on 17 Jul. Pythium blight incidence was low in the trial until mid-August, and disease incidence varied across the experiment. On 14 Aug, the tank-mixture of ARY 0534003 + Disarm and the 9.14 oz rate of Autograph were the only treatments to provide significant disease suppression. On 28 Aug, disease incidence was approaching 50% in untreated control plots, and 17 treatments were controlling Pythium foliar blight. ARY 0534003 + Disarm, Insignia, and Subdue MAXX provided the best control on this date. No phytotoxic effects were detected at any time during the study." |
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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):
Soika, M. D., and L. P. Tredway. 2008. Evaluation of fungicides for control of Pythium foliar blight in tall fescue, 2007. PDMR: Plant Dis. Manage. Rep. 2:p. T018. |
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| Web URL(s):
https://www.plantmanagementnetwork.org/pub/trial/PDMR/reports/2008/T018.pdf
Last checked: 11/14/2016
Requires: PDF Reader |
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