Full TGIF Record # 317069
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Web URL(s):https://scisoc.confex.com/scisoc/2021am/meetingapp.cgi/Paper/136218
    Last checked: 03/28/2022
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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:Influence of fungicide scheduling and bentgrass susceptibility on dollar spot control
Section:Turfgrass pest management oral II: Diseases (includes student competition)
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C05 turfgrass science
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Meeting Info.:Salt Lake City, Utah: November 7-10, 2021
Source:ASA, CSSA and SSSA International Annual Meetings. 2021, p. 136218.
Publishing Information:[Madison, Wisconsin]: [American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America]
# of Pages:1
Abstract/Contents:"Bentgrass (Agrostis spp.) cultivars have variable levels of host susceptibility to dollar spot caused by Clarireedia jacksonii. A 3 ├Ś 6 factorial arranged as a randomized complete block design was used to assess the effectiveness of using curative threshold-based fungicide applications to control dollar spot on six bentgrass cultivars from 2018 to 2020. The fungicide factor included a calendar-based program (21-d interval, nine applications) and two threshold programs that applied fungicide at a threshold of 314-mm2 symptomatic leaf tissue within either 24-h or the next spray-day (Monday). The six cultivars evaluated were 'Capri' colonial bentgrass (A. capillaris), and 'Declaration', '007', 'Shark', 'Penncross' and 'Independence' creeping bentgrass (A. stolonifera). Dollar spot was measured every 1 to 3 days as the active infection area and summarized as the area under each disease outbreak period. Both threshold schedules reduced the annual number of fungicide applications compared to the nine applications in the calendar-based schedule. Fungicide applications were further reduced on cultivars that were less susceptible to dollar spot; as few as 2 applications on Declaration under threshold-based schedules. Calendar-based scheduling resulted in better control of dollar spot across all cultivars compared to threshold-based schedules. For the more tolerant cultivars (Declaration and 007), there was no difference in disease severity between the 24-hours and next spray-day threshold-based schedules. For Capri and the more susceptible cultivars (Shark, Penncross and Independence), disease was more severe when threshold-based applications were made the next spray-day compared to the 24-hours schedule. Within the calendar-based and 24-hours threshold-based schedule, there were almost no differences in disease severity among cultivars. However, within the next spray-day threshold-based schedule, disease was more severe on susceptible compared to tolerant cultivars. Data analysis is currently in progress to assess the commercial acceptability and cost savings associated with curative disease control schedules and dollar spot susceptibility."
Note: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. Influence of fungicide scheduling and bentgrass susceptibility on dollar spot control. Agron. Abr. p. 136218.
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