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ARS Home » Pacific West Area » Corvallis, Oregon » Forage Seed and Cereal Research Unit » Research » Publications at this Location » Publication #399637
Research Project: Improving Plant, Soil, and Cropping Systems Health and Productivity through Advanced Integration of Comprehensive Management Practices

Location: Forage Seed and Cereal Research Unit

Title: First report of Pyricularia grisea causing gray leaf spot of perennial ryegrass (Lolium perenne L.) in Oregon

Author
item BRAITHWAITE, EMILY - Oregon State University
item WANG, RUYING - Oregon State University
item KOWALEWSKI, ALEC - Oregon State University
item TABIMA, JAVIER - Clark University
item Temple, Todd
item Rivedal, Hannah

Submitted to: Plant Health Progress
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 1/26/2023
Publication Date: 8/22/2023
Citation: Braithwaite, E., Wang, R., Kowalewski, A., Tabima, J.F., Temple, T.N., Rivedal, H.M. 2023. First report of Pyricularia grisea causing gray leaf spot of perennial ryegrass (Lolium perenne L.) in Oregon. Plant Health Progress. 24(3):382-385. https://doi.org/10.1094/PHP-11-22-0119-BR.
DOI: https://doi.org/10.1094/PHP-11-22-0119-BR

Interpretive Summary: This report details the first detection of Pyricularia grisea, the gray leaf spot pathogen, causing disease in Oregon perennial ryegrass. This report describes the occurrence of gray leaf spot and pathogenicity testing on the original cultivar mixture growing when disease was found. The confirmation of this pathogen in Oregon may have management implications for turfgrass managers of the state.

Technical Abstract: Gray leaf spot of perennial ryegrass (Lolium perenne), caused by Pyricularia grisea is a devastating turfgrass disease in many regions of the United States. In 2021, P. grisea was detected for the first time in Oregon, causing disease on a perennial ryegrass playing field. This report describes the occurrence of gray leaf spot and pathogenicity testing on the original cultivar mixture growing when disease was found. The confirmation of this pathogen in Oregon may have management implications for turfgrass managers of the state.