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| Web URL(s): | https://listings.lib.msu.edu/nwtgc/1989.pdf#page=31
Last checked: 01/16/2017
Requires: PDF Reader |
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| Publication Type:
| Proceedings |
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| Author(s): | Chastagner, Gary;
Brauen, Stan;
Riley, Kathy;
McQuarrie-Baker, Valerie;
Staley, John;
Johnson, William;
Evans, Dave |
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| Author Affiliation: | Washington State University |
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| Title: | 1989 necrotic ring spot fungicidal control and Kentucky bluegrass susceptibility test results: Fungicidal control |
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| Meeting Info.: | September 18-21, 1989 |
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| Source: | Proceedings of the 43rd Northwest Turfgrass Conference. Vol. 43, 1989, p. 25-31. |
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| Publishing Information: | Spokane, WA: Northwest Turfgrass Association |
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| Keywords: | TIC Keywords: Necrotic ring spot; Fungicides; Poa pratensis
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| Abstract/Contents: | "Necrotic ring spot (NRS) is a serious disease problem on bluegrass turf in the Pacific Northwest. This disease is caused by the soil-borne fungus Leptosphaeria korrae, which causes patch symptons from late spring through fall." A study was undertaken to determine the effectiveness of various fungicides in controlling necrotic ring spot. A plot was established on a mixed three-year-old bluegrass turf. The plot was a randomized complete block design with five blocks and treatments were applied to 6 ft x 20 ft areas of turf in each block. Several rates for each fungicide were tested. All fungicides were applied on 5/11/89 in the equivalent of 4 gallons of water per 1000 ft2 using a boom sprayer equipped with two 8004 teejet nozzles at 40 psi. At the time of application the soil temperature at 1 inch depth was 57 deg F. The incidence of residual patch symptoms from 1988 was assessed on 5/11/89 and averaged 6.6 patches per plot. The effectiveness of the fungicides was determined by counting the number of active patches and estimating the percent of plot with disease symptoms on 9/11/89. Turf color and density were rated on 9/11 on a scale of 1 to 9 where 1 was very light green or thin, and 9 was very dark green or dense turf. Single applications of Spotless and BAS48000F at the highest rates tested significantly reduced the number of patches and percentage of plot area with disease. Applications of Spotless and BAS48000F tended to increase turf color, while an application of BAS48000F at the high rates caused a significant reduction in turf density. |
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| Language: | English |
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| References: | 0 |
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| Note: | Tables |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Chastagner, G., S. Brauen, K. Riley, V. McQuarrie-Baker, J. Staley, W. Johnson, et al. 1989. 1989 necrotic ring spot fungicidal control and Kentucky bluegrass susceptibility test results: Fungicidal control. p. 25-31. In Proceedings of the 43rd Northwest Turfgrass Conference. September 18-21, 1989. Spokane, WA: Northwest Turfgrass Association. |
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| Web URL(s):
https://listings.lib.msu.edu/nwtgc/1989.pdf#page=31
Last checked: 01/16/2017
Requires: PDF Reader |
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MSU catalog number: SB 433 .N6 no.43 |
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