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| Web URL(s): | https://scisoc.confex.com/scisoc/2023am/meetingapp.cgi/Paper/150600
Last checked: 11/30/2023 |
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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Stover, Cole;
Kowalewski, Alexander R.;
Mattox, Clint;
McDonald, Brian W.;
Wang, Ruying |
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| Author Affiliation: | Stover, Presenting Author and Horticulture, Oregon State University, Corvallis, OR; Kowalweski, Mattox, McDonald and Wang: Horticulture, Oregon State University, Corvallis, OR |
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| Title: | The effects of nitrogen source on microdochium patch severity in the PNW |
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| Section: | Turf pest management oral I (includes student competition)
Other records with the "Turf pest management oral I (includes student competition)" Section
C05 turfgrass science
Other records with the "C05 turfgrass science" Section
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| Meeting Info.: | St. Louis, Missouri: October 29-November 1, 2023 |
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| Source: | ASA, CSSA, SSSA International Annual Meeting. 2023, p. 150600. |
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| Publishing Information: | [Madison, Wisconsin]: [American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America] |
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| # of Pages: | 1 |
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| Abstract/Contents: | "Fungicides can be used to manage Microdochium patch (Microdochium nivale), a disease that damages annual bluegrass (Poa annua L.) during cool and humid conditions in the Pacific Northwest. However, recent concerns associated with pesticide use have led to the exploration of alternatives. Past research has determined that frequent winter applications of sulfur containing products reduce activity of this disease. A component not yet evaluated is the effects of fall and winter nitrogen sources on Microdochium patch severity, particularly products containing sulfur. This study aims to identify if there is a difference in Microdochium patch severity when using various sources and rates of fall and winter applied nitrogen. This trial was conducted at the Lewis Brown Research Farm in Corvallis, OR on an annual bluegrass putting green. Experimental design was a six by two factorial in a randomized complete block design with four replications. Factors included nitrogen source [urea (46-0-0), calcium nitrate (15.5-0-0 + 19% Ca), ammonium sulfate (20-0-0 + 24% S), potassium nitrate (13-0-46), ammonium thiosulfate (12-0-0 + 26% SS], and nitrogen rate (4.88 kg N ha-1 and 9.76 kg N ha-1) applied monthly from October 1, 2021, to March 30, 2022 and October 1, 2022 to March 28th, 2023. No traditional fungicides were applied during this period. Percent disease was assessed every two weeks. In both years nitrogen source had a significant effect on disease, whereas no differences were observed between the two nitrogen rates. Applications of ammonium sulfate and ammonium thiosulfate consistently resulted in low disease severity. These results could give turfgrass managers another tool for mitigating the damage from Microdochium patch." |
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| Language: | English |
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| References: | "C05 turfgrass science |
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| See Also: | Original version appears in ASA, CSSA, SSSA International Annual Meeting 2022, p. 143913, with variant title "Nitrogen sources on the suppression of microdochium patch", R=324923. R=324923
Updated version appears in 2024 Winter Turf Field Day Proceedings [Oregon State], Winter 2024, p. 5, R=335780. R=335780 |
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| Note: | "42-11"
This item is an abstract only! |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Stover, C., A. R. Kowalewski, C. Mattox, B. W. McDonald, and R. Wang. 2023. The effects of nitrogen source on microdochium patch severity in the PNW. Agron. Abr. p. 150600. |
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| Web URL(s):
https://scisoc.confex.com/scisoc/2023am/meetingapp.cgi/Paper/150600
Last checked: 11/30/2023 |
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