Full TGIF Record # 309559
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Web URL(s):https://scisoc.confex.com/scisoc/2019am/meetingapp.cgi/Paper/120893
    Last checked: 12/03/2019
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Publication Type:
Content Type:Abstract or Summary only
Author(s):Zhang, Pingyuan; Murphy, James A.; Clarke, Bruce B.
Author Affiliation:Department of Plant Biology, Rutgers University, New Brunswick, NJ
Title:Dollar spot control as affected by fungicide programming and bentgrass susceptibility
Section:C05 turfgrass science
Other records with the "C05 turfgrass science" Section

Turfgrass pest management poster: Diseases, insects, weeds (includes student competition)
Other records with the "Turfgrass pest management poster: Diseases, insects, weeds (includes student competition)" Section
Meeting Info.:San Antonio, Texas: November 10-13, 2019
Source:ASA, CSSA and SSSA International Annual Meetings. 2019, p. 120893.
Publishing Information:[Madison, Wisconsin]: [American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America]
# of Pages:1
Keywords:TIC Keywords: Agrostis stolonifera; Agrostis tenuis; Clarireedia jacksonii; Cultivar evaluation; Disease control; Disease severity; Disease susceptibility; Dollar spot; Fungicide application; Fungicide programs; Threshold values
Cultivar Names:Capri; Declaration; 007; Shark; Penncross
Abstract/Contents:"Dollar spot severity caused by Clarireedia jacksonii differs among bentgrass (Agrostis spp.) cultivars. A 3 ├Ś 6 factorial arranged as a randomized complete block design was used to assess the effectiveness of threshold-based fungicide applications to control dollar spot on six cultivars: 'Capri' colonial bentgrass (A. capillaris), and 'Declaration', '007', 'Shark', 'Penncross' and 'Independence' creeping bentgrass (A. stolonifera). The fungicide factor included a calendar-based program (21-d interval, nine applications) and two threshold programs that applied fungicide at a damage threshold of 314-mm2 within either 24-h or the next spray-day (Monday). Disease severity was measured every 1 to 3 days as the active dollar spot infection area within each plot and summarized as the area under disease progress curve for individual disease outbreaks. Fungicide program was the dominant factor that influenced the severity of dollar spot outbreaks from May to August in both years; outbreaks were more severe for threshold programs compared to calendar program. When differences between threshold programs were apparent (May to August 2019), outbreaks were more severe for the next spray-day program. The cultivar effect was not very pronounced from May to August 2018; whereas, Independence, Penncross and Shark were among the cultivars with the most disease in three out of four outbreaks during this period in 2019. For the October to early-November outbreak in 2018, the ability of fungicide programs to control dollar spot depended on cultivar. Declaration was the only cultivar that maintained a low level of disease across all fungicide programs. Moreover, differences in disease severity among cultivars were only evident under the next spray-day program: Penncross > Shark ┬╗ Capri > Independence ┬╗ 007 > Declaration. The number of threshold applications varied with cultivar in 2018: Declaration received two to three; Capri, 007 and Shark four; Penncross four to five; Independence six applications."
Note:This item is an abstract only!
"Poster #1625"
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Zhang, P., J. A. Murphy, and B. B. Clarke. 2019. Dollar spot control as affected by fungicide programming and bentgrass susceptibility. Agron. Abr. p. 120893.
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