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Title: HOW to Differentiate Dutch Elm Disease from Elm Phloem Necrosis

Author: Gibson, Lester Paul; Hastings, Arthur R.; LeMadeliene, Leon A.;

Date: 1981

Source: NA-FB/P-11. [Broomall, PA]: U.S. Dept. of Agriculture, Forest Service, Northern Area State & Private Forestry

Publication Series: Miscellaneous Publication

Description: Dutch elm disease (DED) and elm phloem necrosis are the two most serious diseases of elm in the United States (Figs. 1 and 2). Most native species of elm are susceptible to both diseases. Dutch elm disease is caused by a fungus, Ceratocystis u1mi (Buisman) C. Moreau, and is transmitted by two species of elm bark beetles-the smaller European elm bark beetle, Scolytus multistriatus (Marsham) and the native elm bark beetle, Hylurgopinus rufipes (Eichoff). Elm phloem necrosis is caused by a mycoplasma-like organism and is transmitted by the whitebanded elm leafhopper Scaphoideus luteolus Van Duzee (Fig. 3). Both diseases also can be transmitted through root grafts between adjacent trees.

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Gibson, Lester Paul; Hastings, Arthur R.; LeMadeliene, Leon A. 1981. HOW to Differentiate Dutch Elm Disease from Elm Phloem Necrosis. NA-FB/P-11. [Broomall, PA]: U.S. Dept. of Agriculture, Forest Service, Northern Area State & Private Forestry

 


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