Full TGIF Record # 325034
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Web URL(s):https://scisoc.confex.com/scisoc/2022am/meetingapp.cgi/Paper/142192
    Last checked: 01/31/2023
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Publication Type:
Content Type:Abstract or Summary only
Author(s):Powlen, Jada; Bigelow, Cale; Fidanza, Michael; Kerns, James P.; McCall, David S.
Author Affiliation:Powlen: Presenting Author and Purdue University; Bigelow: Purdue University; Fidanza: Pennsylvania State University; Kerns: North Carolina State University; McCall: Virginia Tech
Title:Tall fescue brown patch severity as affected by blend ratios of susceptible and resistant cultivars
Section:Turfgrass pest management poster: Diseases, insects, weeds I (includes student competition)
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C05 turfgrass science
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Meeting Info.:Baltimore, Maryland: November 6-9, 2022
Source:ASA, CSSA, SSSA International Annual Meeting. 2022, p. 142192.
Publishing Information:[Madison, Wisconsin]: [American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America]
# of Pages:1
Abstract/Contents:"Brown patch (Rhizoctonia spp.) is one of the major diseases for turf-type tall fescue (Schedonorus arundinaceus Schreb.) lawns throughout the cool-humid regions. Selecting a brown patch resistant cultivar can help reduce turf damage and potentially fungicide needs; however, many lawns consist of species mixtures or cultivar blends. The exact proportion of resistant cultivars to include in blends and mixtures to effectively reduce brown patch has not been well documented. A field study was conducted in West Lafayette, IN and Blacksburg, VA during 2022 to determine the brown patch severity of various blend ratios (0, 25, 50, 75, and 100% by weight) using a brown patch susceptible and resistant tall fescue cultivar. Additionally, tall fescue and Kentucky bluegrass (Poa pratensis L.) mixtures (90% and 10% by weight, respectively) with a susceptible and resistant tall fescue cultivar were evaluated. Blends and mixtures were seeded in September 2021 in both locations. Visual ratings for seasonal appearance/turf quality (1-9=best scale), percentage leaf blight (0-100%), and area under the disease progress curve (AUDPC) was calculated. Similar results in overall turf quality and brown patch severity were observed at both locations. At the West Lafayette location, including = 75% of a resistant cultivar reduced brown patch by 77% compared to the 100% susceptible cultivar. At the Blacksburg location, a 74% reduction in brown patch AUDPC was measured with the resistant tall fescue, Kentucky bluegrass mixture and 100% resistant tall fescue compared to the 100% susceptible tall fescue cultivar. Additionally, blends and mixtures containing = 75% of the resistant cultivar maintained higher average visual quality across both locations compared to the susceptible cultivar alone. This study reinforces the importance of selecting resistant cultivars to reduce seasonal brown patch symptoms."
This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Powlen, J., C. Bigelow, M. Fidanza, J. P. Kerns, and D. S. McCall. 2022. Tall fescue brown patch severity as affected by blend ratios of susceptible and resistant cultivars. Agron. Abr. p. 142192.
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