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| Web URL(s): | https://scisoc.confex.com/scisoc/2022am/meetingapp.cgi/Paper/143499
Last checked: 01/31/2023
Requires: JavaScript; HTML5 |
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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Zhang, Pingyuan;
Groben, Glen;
Ward, Daniel;
Clarke, Bruce B.;
Murphy, James A. |
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| Author Affiliation: | Zhang: Presenting Author and Rutgers University; Groben, Ward, Clarke and Murphy: Rutgers University |
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| Title: | Bentgrass cultivar and autumn-applied fungicide timing effects on spring suppression of dollar spot |
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| Section: | Turfgrass pest management poster: Diseases, insects, weeds I (includes student competition)
Other records with the "Turfgrass pest management poster: Diseases, insects, weeds I (includes student competition)" Section
C05 turfgrass science
Other records with the "C05 turfgrass science" Section
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| Meeting Info.: | Baltimore, Maryland: November 6-9, 2022 |
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| Source: | ASA, CSSA, SSSA International Annual Meeting. 2022, p. 143499. |
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| Publishing Information: | [Madison, Wisconsin]: [American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America] |
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| # of Pages: | 1 |
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| Abstract/Contents: | "Anecdotal observations suggest that autumn-applied fungicide has the potential to reduce dollar spot on fairway turf during the subsequent growing season. However, the optimal timing of autumn-applied fungicide and any interaction with cultivar susceptibility is unclear. Twelve autumn fungicide timings, including a non-treated control, and three creeping bentgrass cultivars (Coho, 007, and Independence) were evaluated in a factorial arranged randomized complete block design with four replications for suppression of dollar spot during the subsequent growing season. Seven calendar-based timings were applied as a tank mix of fluazinam and propiconazole either once (three timings), twice (three timings), or thrice (one timing) in September, October and/or November during 2021. An eighth calendar-based timing received chlorothalonil applied thrice. Two fungicide timings were weather dependent (Smith-Kerns model) and applied as a tank mix of fluazinam and propiconazole when the risk index output reached 20 or 40%. Finally, the tank mix was applied at a threshold level of 314 mm2 disease damage over 3 m2. Leaf tissue was collected on 18 Nov. 2021 for qPCR analysis to quantify pathogen load. While both factors affected suppression of dollar spot during the following season, the cultivar factor had greater impact compared to the fungicide timing factor. Disease onset was delayed by 1- and 3-weeks on 007 and Coho, respectively, compared to Independence. Fungicide timings with the best suppression of dollar spot during the next growing season always included a September application of fluazinam + propiconazole. Data from qPCR analysis indicated that suppression of the C. jacksonii population (inoculum load) in autumn can delay onset and reduce dollar spot severity the subsequent growing season. Unlike fluazinam + propiconazole, chlorothalonil applied in autumn had no effect on disease severity the subsequent growing season, indicating the impact of other fungicide chemistries needs to be evaluated." |
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| Language: | English |
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| References: | 0 |
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| See Also: | Updated version appears in ASA, CSSA, SSSA International Annual Meeting, 2023, p. 150457, R=333375. R=333375 |
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| Note: | "204"
This item is an abstract only! |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Zhang, P., G. Groben, D. Ward, B. B. Clarke, and J. A. Murphy. 2022. Bentgrass cultivar and autumn-applied fungicide timing effects on spring suppression of dollar spot. Agron. Abr. p. 143499. |
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https://scisoc.confex.com/scisoc/2022am/meetingapp.cgi/Paper/143499
Last checked: 01/31/2023
Requires: JavaScript; HTML5 |
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