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    Author(s): J.R. Allison; G.F. Gregory
    Date: 1979
    Source: NA-GR-9. [Broomall, PA]: U.S. Dept. of Agriculture, Forest Service, Northern Area State & Private Forestry
    Publication Series: Miscellaneous Publication
    PDF: View PDF  (10.4 KB)

    Description

    Dutch elm disease (DED), caused by the fungus, Ceratocystis ulmi, is the most devastating shade tree disease in the United States. Healthy elms can become diseased by 1) elm bark beetles that carry the fungus from elm to elm, or 2) through root grafting with already infected trees. Along with wilt symptoms, streaking (sapwood discoloration), a characteristic internal symptom of the disease, progresses rapidly down from limbs inoculated by bark beetles (Allison 1978).

    Publication Notes

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    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

    Citation

    Allison, J.R.; Gregory, G.F. 1979. HOW to Save Dutch Elm Diseased Trees by Pruning. NA-GR-9. [Broomall, PA]: U.S. Dept. of Agriculture, Forest Service, Northern Area State & Private Forestry

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