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| Web URL(s): | https://scisoc.confex.com/scisoc/2017am/webprogram/Paper109195.html
Last checked: 10/13/2017 |
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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Hempfling, James W.;
Murphy, James A.;
Clarke, Bruce B. |
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| Author Affiliation: | Hempfling and Murphy: Plant Biology, Rutgers University, New Brunswick, NJ; Clarke: Department of Plant Biology, Rutgers University, New Brunswick, NJ |
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| Title: | Bentgrass susceptibility affects fungicide programming for dollar spot |
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| Section: | C05 Turfgrass Science
Other records with the "C05 Turfgrass Science" Section
Turf pests: Diseases and insects (includes student competition)
Other records with the "Turf pests: Diseases and insects (includes student competition)" Section
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| Meeting Info.: | Tampa, Florida: October 22-25, 2017 |
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| Source: | ASA, CSSA and SSSA International Annual Meetings. 2017, p. 109195. |
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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: Agrostis stolonifera; Application timing; Cultivar evaluation; Disease control; Disease incidence; Dollar spot; Fungicide application; Sclerotinia homoeocarpa; Susceptibility
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| Cultivar Names: | Independence; Declaration |
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| Abstract/Contents: | "Host susceptibility and fungicide application timing can influence control of dollar spot (caused by Sclerotinia homoeocarpa F.T. Bennett) of creeping bentgrass (Agrostis stolonifera L.) turf. This field study evaluated the effect of fungicide application timings on dollar spot incidence on susceptible ('Independence') and highly tolerant ('Declaration') cultivars. The trial used a 2 x 8 x 2 factorially arranged randomized complete block design with 5 blocks. Factors included bentgrass cultivar; initial fungicide timing [based on disease threshold, calendar, logistic regression model, or growing degree day (GDD) model (20-30, 30-40, 40-50, 50-60, or 60-70 GDD; base 15° C and biofix 1 April)]; and subsequent fungicide timing [logistic regression model or disease threshold]. A calendar program applying fungicide every 21-d from May to November (nine applications yr-1) and an untreated control were included for each cultivar. All plots were inoculated once with S. homoeocarpa isolates NJDS003 and NJDS007 on 7 Apr. 2015 and fungicide treatments (boscalid at 0.38 kg a.i. ha-1) were initiated May 2015 and 2016, and April 2017. Disease response to treatments was limited during 2016 due to unintended dollar spot suppression from fludioxonil. Cultivar was the most important factor influencing the area under disease progress curve during 2015 and 2017 (to-date). Cultivar interacted with subsequent fungicide timing to influence the level of disease control and total annual fungicide inputs during 2015. Logistic regression model- and disease threshold-based subsequent applications produced excellent disease control (< 3 infection centers m-2) on 'Declaration'; whereas, only the logistic-regression model produced consistently excellent disease control on 'Independence'. Three threshold-based applications were made to Declaration plots, regardless of the initial fungicide timing, during 2015; whereas, six or seven threshold-based applications were made to Independence, depending on the initial fungicide timing. Moreover, disease incidence was occasionally unacceptable (up to 8 centers m-2) on 'Independence' threshold-based plots." |
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| Language: | English |
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| References: | 0 |
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| Note: | This item is an abstract only!
"188-5" |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Hempfling, J. W., J. A. Murphy, and B. B. Clarke. 2017. Bentgrass susceptibility affects fungicide programming for dollar spot. Agron. Abr. p. 109195. |
| Fastlink to access this record outside TGIF: https://tic.msu.edu/tgif/flink?recno=290331 |
| If there are problems with this record, send us feedback about record 290331. |
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Last checked: 10/13/2017 |
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