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| Publication Type:
| Report |
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| Author(s): | Soika, M. D.;
Goff, M. |
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| Author Affiliation: | Department of Plant Pathology, Pennsylvania State University, University Park, PA |
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| Title: | Control of pythium foliar blight, 1997 |
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| Source: | Fungicide and Nematicide Tests. Vol. 53, 1998, p. 465. |
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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: Lolium perenne; Pythium aphanidermatum; Disease control; Golf fairways; Trinexapac-ethyl; Azoxystrobin; Application rates; Metalaxyl; Formulations; Tank mix; Propamocarb
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| Abstract/Contents: | "Control of pythium dollar blight, 1997: This study was conducted at the Valentine Turfgrass Research Center, University Park, PA, on perennial ryegrass maintained under golf course fairway management conditions at 0.5 inch cutting height. The soil was Hagerstown siltloam with a soil pH of 7.0. The experimental area was fertilized on 7 Apr with 1.0 lb nitrogen (Scotts 19-26-5) per 1000 sq ft, 10 Jun with 0.5lb nitrogen per 1000 sq ft (Lebanon 28-7-14), and on 23 Jun with 1.0 lb nitrogen per 1000 sq ft (Scotts 19-0-17). On 4 Jun, Vorlan 50WG was applied at 2.0 oz per 1000 sq ft to control red thread and brown patch in the test area. Individual treatment plots, 3 ft x 8 ft, were arranged in a randomized complete block design with three replications. Treatments were applied on 5 Jul to two identical experimental areas (Experimental Areas #1 and #2) with a CO₂-powered boom sprayer, using TeeJet 8004 nozzles, at 40 psi, in water equivalent to 2 gal per 100 sq ft, except as noted in table. Granular formulations were applied with a shaker jar and irrigated with approximately 0.4 inches of water. On 7 Jul, 2 days after treatments (DAT), Experimental Area #1 was inoculated with a 6-isolate pool of Pythium aphanidermatum and enclosed in a 30 ft x 48 ft polyethylene greenhouse to minimize radiational cooling at night. An internal intermittent missing system provided continuous high relative humidity. The greenhouse was vented durning daylight hours. On 13 Jul, the greenhouse enclosing Experimental Area #1 was opened, and Pythium blight severity was evaluated (8 DAT). On 14 Jul (9 DAT), Experimental Area #2 was inoculated with a 6-isolate pool of P. aphanidernatum, and the inoculated area was incubated as described above. Disease pressure in this trial was intese, providing a rigorous challenge to the fungicides tested. Pythium blight severity on Experimental Area #2 was assessed on 17 Jul (12 DAT). Data were subjected to analysis of variance and Duncan's New MRT, P=0.05. At 8 DAT, nine treatments were providing excellent control of Pythium foliar blight, including the two rates of Heritge applied in water equivalent to 4 gal per 1000 sq ft. At 12 DAT, Banol, the high rate of Heritage applied in the high volume, and the high rate granular formulation of Subdue Maxx were performing best in this field experiment." |
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| Language: | English |
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| References: | 0 |
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| See Also: | Other items relating to: Foliar Feeding & Uptake |
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| Note: | Tables |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Soika, M. D., and M. Goff. 1998. Control of pythium foliar blight, 1997. Fungicide Nematicide Tests. 53:p. 465. |
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