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    Author(s): Roy O. Harniss; David L. Nelson
    Date: 1984
    Source: Research Note INT-339. Ogden, UT: U.S. Department of Agriculture, Forest Service, Intermountain Research Station. 6 p.
    Publication Series: Research Note (RN)
    Station: Intermountain Forest Experiment Station
    PDF: Download Publication  (1.71 MB)

    Description

    The extent of Marssonina leaf blight (Marssonina populi) on quaking aspen (Populus tremuloides) was observed in northern Utah and adjacent States in 1981 aand 1982. Area of the epidemic and symptoms of the disease are described. On 1,000 acres (405 hal) in northern Utah, infection levels were 6 percent slight, 12 percent light, 32 percent moderate, 16 percent moderately heavy, and 34 percent heavy.

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    Citation

    Harniss, Roy O.; Nelson, David L. 1984. A severe epidemic of Marssonina leaf blight on quaking aspen in Northern Utah. Research Note INT-339. Ogden, UT: U.S. Department of Agriculture, Forest Service, Intermountain Research Station. 6 p.

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    Keywords

    aspen leaf blight, Populus tremuloides, epidemiology, symptoms

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