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| Publication Type:
| Report |
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| Author(s): | Sanders, P. L.;
Soika, M. D. |
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| Author Affiliation: | Department of Plant Pathology, Pennsylvania State University |
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| Title: | Control of Pythium Blight with Fungicide Treatments, 1987 |
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| Source: | Fungicide and Nematicide Tests. Vol. 43, 1988, p. 286. |
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| Publishing Information: | St. Paul: American Phytopathological Society |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Lolium perenne; Pythium diseases; Pythium aphanidermatum; Fungicides
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| Abstract/Contents: | "Fungicides were evaluated at the Valentine Turfgrass Research Center, University Park, PA, on perennial ryegrass, maintained under home lawn/golf course fairway management conditions. The experimental area was fertilized on Apr 30, May 14, and Jun 23 with 0.5 lbs actual N (NH4NO3) per 1000. Tersan 1991 at 1.0 ox per 1000 sq ft was applied on May 22 and Jun 8, and on Jun 29 at 2.0 oz per 1000 sq ft, to control large brown patch in the expertimental area. Caddy was applied for the control of red thread on Jun 8 and 29 at 1.0 oz per 1000 sq ft. Prograss was applied for Poa annua control on May 6 at a rate of 2 lbs per acre. Individual treatment plots, 3 ft x 18 ft, were arranged in a randomized complete block design with 3 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 treatments were applied on Jun 30, except as noted in the table. Two days after fungicide application, a 3 ft-wide strip across all treatments was inoculated with a 6-isolate pool of Pythium aphanidermatum grown on autoclaved ryegrain. Following inoculation, the 3 ft-wide inoculated strip was covered with PVC pipe-framed, translucent plastic-covered humidity chambers to minimize radiational cooling and increase relative humidity at night. Humidity chambers were equipped with intermittent mist to maintain a saturated atmosphere. Chamber ends were open and two 1-minute mists per hour were applied during daylight hours. At night, chamber ends were closed and no mist was applied. A second inoculation was made 8 days after treatment, in the manner described above. After approximately one week incubation, the chambers were removed and the inoculated areas were visually rated at 8 and 16 days after treatment. Data obtained were subjected to analysis of variance and Waller-Duncan K-ratio t test. Data from July 8 (8 days post-treatment) are presented. Excellent disease suppression was obtained with Subdue MZ77 and the one-third rate, three component mixture of Subdue/Banol/Aliette. Disease suppression with the three component mixture was statistically better than with any of the separate mixture partners applied at the mixture rates." |
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| Language: | English |
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| References: | 0 |
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| Note: | Tables
Reprint appears in Hole Notes, 21(6) August 1992, p. 29 |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Sanders, P. L., and M. D. Soika. 1988. Control of Pythium Blight with Fungicide Treatments, 1987. Fungicide Nematicide Tests. 43:p. 286. |
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MSU catalog number: SB 951.3 .F82 |
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