Full TGIF Record # 317070
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Web URL(s):https://scisoc.confex.com/scisoc/2021am/meetingapp.cgi/Paper/135855
    Last checked: 03/28/2022
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Publication Type:
Content Type:Abstract or Summary only
Author(s):Russell, Travis R.; Kaminski, John E.
Author Affiliation:Russell: Plant Science, Pennsylvania State University, University Park, PA; Kaminski: Plant Science, The Pennsylvania State University, University Park, PA
Title:Characterization of Pythium patch, a putative new disease of annual bluegrass putting greens
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. 135855.
Publishing Information:[Madison, Wisconsin]: [American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America]
# of Pages:1
Abstract/Contents:"First noticed in 2005, a potentially new disease of annual bluegrass (Poa annua L.; ABG) has been observed on golf course putting greens in the northeastern US. Disease symptoms on ABG include yellow to orange, circular patches ranging from 10 to 50 cm in diameter. Signs on infected tissue revealed coenocytic mycelium and embedded oospores, characteristic of Pythium spp. The objectives of this study were to 1) identify the pathogens causing symptoms on ABG; 2) determine cardinal temperatures for growth of collected isolates; 3) complete Koch's postulates with collected isolates in controlled environment and under field conditions. Sequencing of the internal transcribed spacer region of rDNA, cytochrome x oxidase subunit I, and b-tubulin for 15 collected isolates revealed co-identity as Pythium aristosporum or Pythium arrhenomanes. Maximum growth on clarified-V8 agar occurred between 25-30C for most isolates. Collected isolates were able to cause disease on seedling ABG and creeping bentgrass (Agrostis stolonifera L.) in controlled environment pathogenicity assays. Disease symptoms were produced in inoculated ABG putting green field plots and pathogens reisolated out of symptomatic tissue. This previously unreported disease of annual bluegrass is caused by the species complex of P. aristosporum/P. arrhenomanes and is termed Pythium patch. Further morphological and molecular studies are needed to disentangle causal species identity for this disease."
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Russell, T. R., and J. E. Kaminski. 2021. Characterization of Pythium patch, a putative new disease of annual bluegrass putting greens. Agron. Abr. p. 135855.
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    Last checked: 03/28/2022
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