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    Author(s): J. Dunlap
    Date: 2011
    Source: In: Keane, Robert E.; Tomback, Diana F.; Murray, Michael P.; Smith, Cyndi M., eds. The future of high-elevation, five-needle white pines in Western North America: Proceedings of the High Five Symposium. 28-30 June 2010; Missoula, MT. Proceedings RMRS-P-63. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station. p. 270.
    Publication Series: Proceedings (P)
    Station: Rocky Mountain Research Station
    PDF: View PDF  (145.32 KB)

    Description

    White pine blister rust (caused by the non-native pathogen Cronartium ribicola) reached northern California about 80 years ago. Over the years its spread southward had been primarily recorded on sugar pine. However, observations on its occurrence had also been reported in several of the higher elevation five-needled white pine species in California. Since the late 1990s, field surveys have substantiated that rust is present in several of these higher elevation species. The combined results of three local surveys in the Sierra Nevada and Warner mountains documented the occurrence of rust in western white and whitebark pines, but not in southern Sierra foxtail or limber pine. A 2004-2006 Statewide survey, funded by the USDA Forest Service (USDA-FS) Forest Health Monitoring Program, showed that the incidence of rust varied considerably within and between regions.

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    Citation

    Dunlap, J. 2011. Status of white pine blister rust and seed collections in california's high-elevation white pine species. In: Keane, Robert E.; Tomback, Diana F.; Murray, Michael P.; Smith, Cyndi M., eds. The future of high-elevation, five-needle white pines in Western North America: Proceedings of the High Five Symposium. 28-30 June 2010; Missoula, MT. Proceedings RMRS-P-63. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station. p. 270.

    Keywords

    high elevation five-needle pines, threats, whitebark, Pinus albicaulis, limber, Pinus flexilis, southwestern white, Pinus strobiformis, foxtail, Pinus balfouriana, Great Basin bristlecone, Pinus longaeva, Rocky Mountain bristlecone pine, Pinus aristata

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https://www.fs.usda.gov/treesearch/pubs/38236