Full TGIF Record # 317170
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Web URL(s):https://scisoc.confex.com/scisoc/2021am/meetingapp.cgi/Paper/136474
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Publication Type:
Content Type:Abstract or Summary only
Author(s):Zhang, Pingyuan; Clarke, Bruce B.; Murphy, James A.
Author Affiliation:Department of Plant Biology, Rutgers University, New Brunswick, NJ
Title:Autumn-applied fungicide timing effects on the development of dollar spot
Section:C05 turfgrass science
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Turfgrass pest management poster: Diseases, insects, weeds (includes student competition)
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Meeting Info.:Salt Lake City, Utah: November 7-10, 2021
Source:ASA, CSSA and SSSA International Annual Meetings. 2021, p. 136474.
Publishing Information:[Madison, Wisconsin]: [American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America]
# of Pages:1
Related Web URL:https://scisoc.confex.com/scisoc/2021am/c5/eposterview.cgi?eposterid=642
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    Notes: "Autumn-applied fungicide timing effects on the development of dollar spot"
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    Notes: "Autumn-applied fungicide timing effects on the development of dollar spot"
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    Notes: Direct download; "Autumn-applied fungicide timing effects on the development of dollar spot"
Abstract/Contents:"Anecdotal evidence suggests that autumn-applied fungicide has the potential to reduce dollar spot caused by Clarireedia jacksonii the following season; however, the appropriate timing is not clear since multiple autumn applications are typically made. Eight fungicide treatments and anon-treated control were arranged in a randomized complete block design with 4 replications to evaluate the suppression of dollar spot the subsequent growing season. The trial was conducted on a 3-year-old '007' creeping bentgrass (A. stolonifera) turf mowed at 9.5 mm in North Brunswick, NJ. Dollar spot developed naturally in trial area before the initiation of the study in September 2019. Fungicide treatments were initiated after pre-trial suppression of dollar spot on the entire study area; seven treatments received a tank mix of fluazinam and propiconazole once (three timings), twice (three timings), or thrice (one timing) in September, October and/or November in 2019 and 2020. An eighth treatment received chlorothalonil thrice. The area of dollar spot infection centers was assessed every 1 to 7 days September to November 2019 and 2020 and May to September 2020 and 2021. Fluazinam + propiconazole suppressed dollar spot development the following spring and early summer in both years. However, chlorothalonil resulted in reduced (2020) or no (2021) suppression of dollar spot compared to the non-treated control. The application of fluazinam + propiconazole in Sep-Oct and Sep-Oct-Nov provided the best suppression of dollar spot the subsequent growing season in both years. Disease response to the November fungicide timing varied with year, highlighting the influence of environment on fungicide efficacy. Research is in progress to determine the impact of host susceptibility, inoculum load, and autumn-applied fungicide timing, based on calendar date, disease threshold, and disease predictive model output, on the development of dollar spot during the subsequent growing season."
Note:"Poster # 1249"
Section "159"
This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Zhang, P., B. B. Clarke, and J. A. Murphy. 2021. Autumn-applied fungicide timing effects on the development of dollar spot. Agron. Abr. p. 136474.
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