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| Web URL(s): | https://scisoc.confex.com/crops/2015am/webprogram/Handout/Paper93757/Jesse%20Benelli_2015%20ASA%20Poster.pdf
Last checked: 11/30/2015
Requires: PDF Reader |
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| Publication Type:
| Report |
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| Material Type: | Presentation |
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| Author(s): | Benelli, Jesse J.;
Horvath, Brandon J. |
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| Author Affiliation: | Plant Sciences, University of Tennessee - Knoxville, Knoxville, TN |
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| Title: | Large patch (Rhizoctonia solani) control affected by fungicide and target site of application |
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| Section: | C05 turfgrass science
Other records with the "C05 turfgrass science" Section
Graduate student poster competition: Turfgrass weeds, diseases, and insect pests
Other records with the "Graduate student poster 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. 93757. |
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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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| Related Web URL: | https://scisoc.confex.com/crops/2015am/webprogram/Paper93757.html
Last checked: 11/13/2015
Notes: Abstract only |
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| Keywords: | TIC Keywords: Azoxystrobin; Chlorothalonil; Disease control; Disease profile; Disease severity; Flutolanil; Fungicide evaluation; Rhizoctonia blight; Tebuconazole; Zoysia japonica
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| Abstract/Contents: | "Large patch (Rhizoctonia solani) affects the sheaths and stems of Japanese lawngrass (JLG) (Zoysia japonica) in the transition zone of the United States. Large patch is difficult to control using traditional fungicide sprays because most of the fungicide solution remains on the leaf blade and away from the site of pathogen infection which occurs lower in the canopy. Our objective was to determine the amount of protection provided by fungicides deposited on the leaf, sheath, or stem parts of the plant. Greenhouse experiments were conducted in 2015 in Knoxville, TN, to evaluate large patch control using fungicides deposited on three target sites of JLG (leaf, sheath, and stem). Azoxystrobin (0.61 kg ai ha-1), flutolanil (4.69 kg ai ha-1), chlorothalonil (8.05 kg ai ha-1), and tebuconazole (0.83 kg ai ha-1) were applied using a pipette as 2.5μl droplets that were dispensed singly on the leaf, sheath, or stem. Plants were inoculated with R. solani and kept in a growth chamber under high humidity. Measurements of visual disease severity (0-100%) and plant stress (Fv/Fm) were collected every 7 days. In both experimental runs, JLG treated with fungicides applied on the sheath or stem exhibited significantly lower large patch severity and higher Fv/Fm values compared to JLG receiving leaf applications on most rating dates. Large patch control of azoxystrobin treated JLG was most affected by the site of application. At 28 days after treatment, leaf applications of azoxystrobin exhibited 74% disease severity, whereas the sheath and stem applications both exhibited <5% disease severity. Chlorothalonil, a contact fungicide, was least affected by the site of target application on most rating dates. Future research is needed to improve lower canopy fungicide deposition under field conditions. Fungicide sprays that incorporate surfactants may help redistribute the fungicide from the leaf blade to the lower plant canopy." |
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| Language: | English |
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| References: | 3 |
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| Note: | "146-8"
"Poster Number 1020"
Pictures, color
Graphs |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Benelli, J. J., and B. J. Horvath. 2015. Large patch (Rhizoctonia solani) control affected by fungicide and target site of application. Agron. Abr. p. 93757. |
| Fastlink to access this record outside TGIF: https://tic.msu.edu/tgif/flink?recno=266977 |
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| Web URL(s):
https://scisoc.confex.com/crops/2015am/webprogram/Handout/Paper93757/Jesse%20Benelli_2015%20ASA%20Poster.pdf
Last checked: 11/30/2015
Requires: PDF Reader |
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