Full TGIF Record # 317167
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Web URL(s):https://scisoc.confex.com/scisoc/2021am/meetingapp.cgi/Paper/135509
    Last checked: 04/01/2022
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Publication Type:
Content Type:Abstract or Summary only
Author(s):Powlen, Jada; Bigelow, Cale; Kerns, James P.; Fidanza, Michael
Author Affiliation:Powlen and Bigelow: Purdue University, West Lafayette, IN; Kerns: Plant Pathology, North Carolina State University, Raleigh, NC; Fidanza: Pennsylvania State University, Reading, PA
Title:Tall fescue cultivar morphological characteristics influence brown patch resistance under controlled environment conditions
Section:C05 turfgrass science
Other records with the "C05 turfgrass science" Section

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. 135509.
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 solani AG 2-2IIIB) is one of the major turfgrass diseases impacting turf-type tall fescue (Schedonorus arundinaceus) during the summer months. Disease damage reduces summer quality and density which may require fall overseeding. The selection of tall fescue cultivars with brown patch resistance is an important cultural management practice to reduce brown patch. Improved cultivars have different morphological traits (e.g. leaf blade width, growth rate, density, endophyte infection) that may impact disease incidence and severity. A controlled environment experiment was conducted to screen 20 tall fescue cultivars for brown patch resistance and attempt to correlate disease resistance with various morphological characteristics. Cultivars were screened for disease resistance over a two-year period using mini-lysimeters. To quantify brown patch susceptibility, cultivars were inoculated with R. solani and immediately placed in an enclosed polyethylene chamber that maintains high humidity, temperature, and increased leaf wetness duration. Disease susceptibility was determined by visual assessment of percentage blight and quantitatively using digital image techniques, and area under the disease progress curve (AUDPC) was calculated. Brown patch severity in year one ranged from 31.3% to 57.5% after 28 days, and ranged from 37.6% to 75.4% after 26 days, in year two. Prior to inoculating lysimeters in year two, leaf blade width and leaf sheath width, endophyte tiller infection and relative growth as dry matter yield (DMY) were measured. Significant differences in leaf blade width, sheath width, DMY, and endophyte infection were observed among the tall fescue cultivars. Little correlation among morphological characteristics and brown patch resistance were observed. This study demonstrates the importance of cultivar selection for reducing brown patch in tall fescue lawns and that high shoot density cultivars with narrow leaves do not appear to be more susceptible to brown patch and other genetic factors impart disease resistance."
Note:"Poster # 1247"
Section "159"
This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Powlen, J., C. Bigelow, J. P. Kerns, and M. Fidanza. 2021. Tall fescue cultivar morphological characteristics influence brown patch resistance under controlled environment conditions. Agron. Abr. p. 135509.
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    Last checked: 04/01/2022
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