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| Web URL(s): | https://scisoc.confex.com/crops/2015am/webprogram/Paper92811.html
Last checked: 11/04/2015 |
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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Pan, Xiaowei;
Xiong, Xi;
Kremer, Robert J.;
English, James T.;
Richardson, Michael D.;
Deng, Shiping |
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| Author Affiliation: | Kremer: Soil Environmental & Atmospheric Sciences; Pan, Xiong, and English: University of Missouri, Columbia, MO; Richardson: University of Arkansas, Fayetteville, AR; Deng: Dept of Plant and Soil Sciences, Oklahoma State University, Stillwater, OK |
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| Title: | Effects of organic amendments and cultural practices for control of large patch (Rhizoctonia solani) on Zoysiagrass (Zoysia japonica) Fairway |
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| Section: | C05 turfgrass science
Other records with the "C05 turfgrass science" Section
Graduate student oral competition: Turfgrass weeds, diseases, and insect pests
Other records with the "Graduate student oral competition: Turfgrass weeds, diseases, and insect pests" Section
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| Meeting Info.: | Minneapolis, Minnesota: November 15-18, 2015 |
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| Source: | ASA, CSSA and SSSA International Annual Meetings. 2015, p. 92811. |
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| Publishing Information: | [Milwaukee, Wisconsin]: [American Society of Agronomy and the Entomological Society of America] |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Antagonism; Competitive ability; Cultural methods; Disease control; Evaluations; Golf green maintenance; Nitrogen fertilization; Organic amendments; Parasitism; Rhizoctonia blight; Rhizoctonia solani; Topdressing program; Zoysia japonica
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| Abstract/Contents: | "Organic amendments may suppress soil-borne pathogens by increasing soil microbial abundance and activity, which subsequently suppress fungal disease by antagonism, parasitism, and/or competition. However, little information is available on the use of organic amendments and their delivering methods to suppress large patch caused by Rhizoctonia solani on zoysiagrass (Zoysia japonica). The objective of this study was to evaluate the effect of different organic amendments delivered by topdressing or topdressing following aerification on soil microbial community composition and large patch on zoysiagrass. A two-year field experiment was established on a zoysiagrass fairway growing on native soil (silt loam) of a local golf course at Columbia, MO. The field plots were inoculated with R. solani in the previous fall, which resulted in disease development in more than 90% of the plots prior to the treatment application. Various organic amendments applied included an animal waste-based product (AW; Back to nature chicken manure), a sewage-based organic N fertilizer (ON; Milorganite), and a plant byproduct (PB; mustard seed meal), in addition to a synthetic N fertilizer (SN; UMAXX), a synthetic fungicide (SF; azoxystrobin), and an untreated control (UN). The materials were applied by topdressing with sand or topdressing following aerification twice a year (spring and fall) for two years. Except SF, all materials applied added the same amount of N approximately 150 kg ha-1 per year. Over the two-year period, measured by area under disease progress curve (AUDPC), AW and SF reduced disease severity by 49% and 86% of those in UN, respectively. The ON, PB, and SN also showed reduction in AUDPC. However, the reductions were not significantly different from those in UN. Amendments applied resulted in a shift of soil gram positive to gram negative bacteria ratio based on phospholipid fatty acid (PLFA) analysis, with the similar trend as AUDPC. Cultural practices of topdressing and topdressing following aerification also influenced soil microbial community composition. Plots receiving topdressing following aerification showed significantly reduced stress indicators, including the ratios of fungi to bacteria, cyclopropyl 17 to its precursor, and saturated to monounsaturated fatty acid, compared to topdressing only. In conclusion, shifts of stress indicators induced by topdressing following aerification suggested suppression of fungi but stimulation of bacteria in soil." |
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| Language: | English |
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| References: | 0 |
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| Note: | This item is an abstract only!
"36-3" |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Pan, X., X. Xiong, R. J. Kremer, J. T. English, M. D. Richardson, and S. Deng. 2015. Effects of organic amendments and cultural practices for control of large patch (Rhizoctonia solani) on Zoysiagrass (Zoysia japonica) Fairway. Agron. Abr. p. 92811. |
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Last checked: 11/04/2015 |
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