Full TGIF Record # 309566
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Web URL(s):https://scisoc.confex.com/scisoc/2019am/meetingapp.cgi/Paper/121098
    Last checked: 12/03/2019
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Publication Type:
Content Type:Abstract or Summary only
Author(s):Vines, Phillip L.; Daddio, Ryan; Wang, Ruying; Luo, Jing; Zhang, Ning; Clarke, Bruce B.; Meyer, William A.; Bonos, Stacy A.
Author Affiliation:Department of Plant Biology, Rutgers University, New Brunswick, NJ
Title:Gray leaf spot disease of hard fescue (Festuca brevipila)
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. 121098.
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: Disease identification; Festuca brevipila; Festuca ovina subsp. duriuscula; Genetic analysis; Gray leaf spot; Koch's postulates; Morphological evaluation; Pyricularia grisea; Variety trials
Cultivar Names:Beacon; Reliant IV
Abstract/Contents:"Gray leaf spot, caused by the fungal pathogen Pyricularia oryzae, is a serious disease of perennial ryegrass (Lolium perenne) and tall fescue (Schedonorus arundinaceus) cool-season turf in the United States. Initial disease symptoms include small, water-soaked lesions on leaf blades that develop into dark, necrotic spots. The infections expand into circular to oblong lesions and become gray to grayish-brown with dark brown to purple borders. As the disease progresses, lesions coalesce and cause tip blighting, which often leads to twisting or flagging of leaf blades. These characteristic gray leaf spot symptoms were observed in a hard fescue (Festuca brevipila) variety trial at the Rutgers turfgrass research farm in Adelphia, NJ in October 2018. Thus, the objective of this study was to conduct Koch's postulates to determine if P. oryzae was the causal organism of gray leaf spot symptoms in hard fescue. Two isolates of P. oryzae (181001P12 and D30045) and two hard fescue cultivars ('Beacon'and 'Reliant IV') were used in this trial. Inoculations were carried out using conidial suspensions at 4 x 10-4 conidia ml-1 concentration. Disease symptoms were observed 7 to 21 days post-inoculation for both isolates on both cultivars. Koch's postulates were fulfilled by morphological evaluations and DNA sequencing of the reisolated fungi. This study confirms that P. oryzae can incite gray leaf spot disease on hard fescue. In addition, given the historical significance of gray leaf spot disease in other turf species, this study suggests that gray leaf spot could be a major concern for managing hard fescue turf in the future."
See Also:See also related article "Pyricularia oryzae incites gray leaf spot disease on hard fescue (Festuca brevipila)" International Turfgrass Society Research Journal, 14(1) June 2022, p. 997-1002, R=321501. R=321501
Note:This item is an abstract only!
"Poster #1631"
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Vines, P. L., R. Daddio, R. Wang, J. Luo, N. Zhang, B. B. Clarke, et al. 2019. Gray leaf spot disease of hard fescue (Festuca brevipila). Agron. Abr. p. 121098.
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