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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Sanders, P. L.;
Soika, M. D. |
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| Author Affiliation: | Dept. of Plant Pathology, The Pennsylvania State University, University Park, Pennsylvania |
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| Title: | Control of Pythium blight with fungicide treatments, 1990 |
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| Source: | Fungicide and Nematicide Tests. Vol. 46, 1991, p. 328. |
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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; Pythium diseases; Pythium aphanidermatum; Fungicides; Fungicide evaluation; Diseases; Disease control
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| Abstract/Contents: | "This evaluation was conducted at the Valentine Turfgrass Research Center, University Park, PA, on perennial ryegrass, maintained under golf course fairway management conditions. Two applications of Prograss at a rate of 4 and 2 oz per 1000 sq ft, were applied for Poa annua control on 21 Aug and 20 Sept, 1989, respectively. The experimental area was fertilized on 8 and 23 May and 19 Jun with 0.5 lbs actual N (NH4 NO3) per 1000 sq ft. Caddy at 1.5 fl oz per 1000 sq ft was applied on 22 May to control red thread/pink patch in the experimental area. Individual treatment plots, 3 ft x 18 ft, were arranged in a randomized complete block design with three replications. Fungicides were applied with a CO2-powered, boom sprayer using T-jet 8004 nozzles, at 30 psi, in water equivalent to 2 gal per 1000 sq ft. Fungicide applications were made on 16 Jul. One day after fungicide application (17 Jul), a 3 ft-wide strip across all treatments was inoculated with a 6-isolate pool of Pythium aphanidermatum grown on autoclaved rye grain. Following inoculation, the 3 ft-wide inoculated strip was covered with PVC pipe-framed, translucent plastic-covered humidity chambers to increase relative humidity and minimize radiational cooling at night. Humidity chambers were equipped with intermittent mist to maintain a saturated atmosphere. Chamber ends were open and a 1-minute mist was applied every 20 min during daylight hours. At night, chamber ends were closed and no mist was applied. After one week incubation, the chambers were removed and the noculated areas were visually rated (8 days post-treatment). A second sequential inoculation was made on 24 Jul in the manner described above. chambers were removed, and this inoculation was rated at 16 days post-treatment (31 Jul). Data were subjected to analysis of variance and Waller-Duncan K-ratio t test. At 8 days after fungicide application, 7 of the 15 chemicals tested provided control of Pythium blight. By 16 days post-treatment, the three Banol/Subdue mixtures, including the half-rate mixture, were still providing excellent disease control." |
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| Language: | English |
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| References: | 0 |
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| Note: | Reprint appears in Turfgrass Research Results 1990/1991 [Penn State], 1991, p. 43-44
This item is an abstract, with table, only! |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Sanders, P. L., and M. D. Soika. 1991. Control of Pythium blight with fungicide treatments, 1990. Fungicide Nematicide Tests. 46:p. 328. |
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