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    Author(s): Mike Albers; Jana Albers; Jane Cummings-Carlson; Linda Haugen; Nancy Wenner
    Date: 1996
    Source: NA-PR-06-96. [Broomall, PA:] U.S. Dept. of Agriculture, Forest Service, Northern Area State & Private Forestry
    Publication Series: Full Proceedings
    PDF: View PDF  (5.43 KB)

    Description

    Rhizosphaera pini is a common plant pathogen in the Lake States, Northeastern States and Canada. A closely related pathogen, Rhizosphaera kalkhoffii, causes a common needle blight on spruce and other conifers. R. pini is often considered to be a weak pathogen, occurring on stressed foliage or foliage killed by other causes. However, it has been observed causing significant damage on balsam fir and Fraser fir. It appears to be particularly damaging in shaded, damp areas and when the trees are under other stress.

    Publication Notes

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    Citation

    Albers, Mike; Albers, Jana; Cummings-Carlson, Jane; Haugen, Linda; Wenner, Nancy 1996. Rhizosphaera Needle Disease of Fir. NA-PR-06-96. [Broomall, PA:] U.S. Dept. of Agriculture, Forest Service, Northern Area State & Private Forestry

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