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| Web URL(s): | https://www.plantmanagementnetwork.org/pub/trial/PDMR/volume3/abstracts/T05.asp
Last checked: 05/31/2017
Notes: Report summary
https://www.plantmanagementnetwork.org/pub/trial/PDMR/reports/2009/T005.pdf
Last checked: 05/31/2017
Requires: PDF Reader |
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| Publication Type:
| Report |
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| Author(s): | Wong, F. P.;
Rios, J. C. |
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| Author Affiliation: | Department of Plant Pathology and Microbiology, University of California, Riverside, California |
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| Title: | Evaluation of fungicides for curative control of southern blight in southern California, 2007 |
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| Source: | PDMR: Plant Disease Management Reports. Vol. 3, 2009, p. T034. |
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| Publishing Information: | St. Paul, MN: American Phytopathological Society |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Agrostis stolonifera; Azoxystrobin; Azoxystrobin + Propiconazole; Disease control; Flutolanil; Fungicide efficacy; Fungicide evaluation; Poa annua; Pyraclostrobin; Sclerotium rolfsii; Therapeutic control; Trifloxystrobin + triadimefon
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| Cultivar Names: | Penn A-4 |
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| Trade Names: | Headway; Heritage; Insignia; Prostar; Tartan |
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| Abstract/Contents: | "The objective of this study was to evaluate the efficacy of fungicides for the control of southern blight on a mixed creeping bentgrass and annual bluegrass experimental green at UC Riverside. The green was a mix 90/10 mix of 'Dominant' creeping bentgrass and annual bluegrass, established in 2005 from sod. Turf was mowed 3 days a week at a height of 0.25-in. and irrigated daily according to ET needs. Treatment plots were 4 x 4 ft, and each plot was inoculated on 21 May by making five 6-in. long cuts 1-in. deep into each plot and placing approximately 0.1 oz of oat seed infested with S. Rolfsii into each slit. Inoculum was produced by growing S. Rolfsii on autoclaved oat seed for 4 weeks at 28°C prior to use. Disease symptoms developed on the plots approximately 15 Jun as small yellow rings several inches in diameter and fungicide applications were initiated on 29 Jun. Fungicide treatments were applied to four replicated plots per treatment with a CO2-powered backpack sprayer, using TeeJet 8002 flat fan nozzles to deliver the equivalent of 2 gal dilute fungicide spray per 1,000 sq ft at 35 psi at an approximate 14- or 28-day interval, with the last application being made on 10 Aug. Disease severity was rated by evaluation of percent area diseased using a 0 to 11 modified Horsfall-Barratt scale and converted back to percent severity data. Area underneath the disease progress curve (AUDPC) was calculated based upon the severity readings taken on 13 and 27 Jul and 10 and 24 Aug. Disease severity data and AUDPC was analyzed by ANOVA and mean comparisons were performed using Fisher's Protected Least Significant Difference test (α = 0.05). The initial disease symptoms were very uniform throughout the plots prior to fungicide application. After the initial application on 29 Jun, treated areas stopped developing disease or recovered, while the untreated check continued to increase in severity. All fungicide treatments appeared to be different from the untreated check. The higher rate applications of the fungicides appeared to provide slightly more disease control for any given evaluation date, but in almost all of the cases, effects were not significantly different from the lower rate applied more frequently. These results were also reflected in the AUDPC rating for each treatment. T-tests comparing low versus higher rate applications for disease severity on the ratings for 13 Jul and afterwards, and AUDPC evaluation did show that all higher rate applications (regardless of fungicide) provided more control than the lower rate (P < 0.05)." |
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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):
Wong, F. P., and J. C. Rios. 2009. Evaluation of fungicides for curative control of southern blight in southern California, 2007. PDMR: Plant Dis. Manage. Rep. 3:p. T034. |
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| If there are problems with this record, send us feedback about record 155245. |
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| Web URL(s):
https://www.plantmanagementnetwork.org/pub/trial/PDMR/volume3/abstracts/T05.asp
Last checked: 05/31/2017
Notes: Report summary
https://www.plantmanagementnetwork.org/pub/trial/PDMR/reports/2009/T005.pdf
Last checked: 05/31/2017
Requires: PDF Reader |
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