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| Web URL(s): | https://scisoc.confex.com/scisoc/2020am/meetingapp.cgi/Paper/126422 Last checked: 09/12/2023 |
| Publication Type: | Report |
| 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: | Influence of fungicide programming and bentgrass susceptibility on dollar spot control |
| Section: | Turfgrass management and ecology poster (includes student competition) Other records with the "Turfgrass management and ecology poster (includes student competition)" Section C05 turfgrass science Other records with the "C05 turfgrass science" Section |
| Meeting Info.: | San Antonio, Texas: November 9-13, 2020 |
| Source: | ASA, CSSA, SSSA International Annual Meeting. November 2020, p. 126422. |
| 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 Π6 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 during 2018 and 2019. 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 disease progress curve (AUDPC) for individual and overall disease outbreaks. Both threshold programs reduced the number of fungicide applications by 33% to 76%, compared to calendar-based program, with the fewest applications occurring on less susceptible cultivars. Calendar-based treatments resulted in no major outbreaks, whereas 10 disease outbreaks occurred in each on both threshold programs for all cultivars. For most outbreaks, 24-h and next spray day threshold programs provided a similar level of control. When differences were evident, the next spray day threshold program typically had more severe disease outbreaks. The level of disease control was very good and similar among the three fungicide programs on less susceptible cultivars, indicating the potential for commercially successful use of threshold-based programs to reduce fungicide use. Cost models are being developed to assess the economic impact of threshold-based programs to control dollar spot on cultivars that differ in susceptibility." |
| Language: | English |
| References: | 0 |
| Note: | This item is an abstract only! Tables Graphs |
| ASA/CSSA/SSSA Citation (Crop Science-like – may be incomplete): | Zhang, P., J. A. Murphy, and B. B. Clarke. 2020. Influence of fungicide programming and bentgrass susceptibility on dollar spot control. Agron. Abr. p. 126422. |
| Fastlink to access this record outside TGIF: | http://tic.msu.edu/tgif/flink/RECNO/331701 |
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| Web URL(s) : | https://scisoc.confex.com/scisoc/2020am/meetingapp.cgi/Paper/126422 Last checked: 09/12/2023 |
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