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| Web URL(s): | https://www.plantmanagementnetwork.org/pub/trial/PDMR/reports/2011/T042.pdf
Last checked: 11/14/2016
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| Publication Type:
| Report |
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| Author(s): | Wong, F. P.;
Rios, J. C.;
Avila, A. B.-J.;
Ries, S. B. |
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| Author Affiliation: | Wong, Rios and Avila: Department of Plant Pathology & Microbiology; Ries: Agricultural Operations, University of California, Riverside |
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| Title: | Control of turfgrass anthracnose in southern California, 2010 |
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| Section: | Turfgrass
Other records with the "Turfgrass" Section
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| Source: | PDMR: Plant Disease Management Reports. Vol. 5, 2011, p. T042. |
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| Publishing Information: | St. Paul, MN: American Phytopathological Society |
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| # of Pages: | 2 |
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| Keywords: | TIC Keywords: Anthracnose; Colletotrichum graminicola; Disease control; Disease severity; Fungicide efficacy; Fungicide evaluation; Poa annua
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| Cultivar Names: | Peterson's Creeping Bluegrass |
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| Geographic Terms: | Southern California |
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| Abstract/Contents: | "Fungicide treatments were evaluated for their effectiveness in controlling anthracnose (Colletotrichum cereale) on annual bluegrass at Agricultural Operations at UC Riverside. The native soil, 'push-up' green was established in 2007. Turf was irrigated daily at 100% ET0 and mowed three times per week at 0.25-in. The site was cultivated using 1/2-in. solid-tines and sand-topdressed monthly. Plots received 0.5 lb nitrogen per 1,000 sq ft monthly from Oct to Dec, Feb and Mar. No fertilizer was applied from Apr until the initiation of the study. Plots were inoculated on 1 Jun with anthracnose spores grown in the laboratory at a concentration of approximately 1X104 spores/ml (3.8 x 107 spores/gallon) applied at the equivalent of 1 gal/1,000 sq ft. Damage appeared in plots by 15 Jun, characterized by irregular areas of bronze-orange turf with black acervuli present on the tissue. Fungicide applications were initiated on 15 Jun at 14-day intervals until 7 Sep (6 applications total). Fungicide treatments were applied to four replicated 3 x 5 ft plots per treatment in a randomized complete block design 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. Disease severity (% plot area damaged) was evaluated every 14 days. Data was analyzed by ANOVA followed by means separation using Fisher's Protected LSD (α=0.05). Data was not taken on 21 Sep. Disease pressure during the trial was good, with check plots reaching a maximum of 82.5% disease by 10 Aug. Generally, curative applications slowed the rate of disease progress after the first applications but it was not until after the 3rd application that significant differences were observed between treatments (27 Jul evaluation date) and by 24 Aug, all treatments had complete control of the disease. Of the solo applications, Torque (tebuconazole) appeared slightly inferior to the other DMI Tourney (metconazole). The alternation of Torque, Affirm and Spectro provided somewhat better control (although statistically equal to Torque used alone). Velista provided good control at both rates, but the chlorothalonil premix (LEM17-50-76/chlorothalonil) appeared to be more effective. Amongst the remaining pre-mix and tank-mix products (Renown, Reserve, Concert, Disarm C and M, Signature plus Daconil), all appeared to perform well but the Signature and Daconil tank mix and Concert (chlorothalonil plus propiconazole) were slightly weaker. Amongst Syngenta and Bayer rotational programs, all programs provided near complete control of the disease. The application of Primo MAXX in the Syngenta summer program did not appear to cause any negative summer plant growth regulator effects and color in these plots were amongst the best in the trial (data not shown). No direct phytotoxicity or injury was seen during the warm 85 to 95°F dry conditions the experiment was conducted under." |
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| Language: | English |
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| References: | 0 |
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| Note: | This item is as abstract and tables only!
Tables |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Wong, F. P., J. C. Rios, A. B.-J. Avila, and S. B. Ries. 2011. Control of turfgrass anthracnose in southern California, 2010. PDMR: Plant Dis. Manage. Rep. 5:p. T042. |
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| Web URL(s):
https://www.plantmanagementnetwork.org/pub/trial/PDMR/reports/2011/T042.pdf
Last checked: 11/14/2016
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
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