Dutch elm disease: see diseases of plants diseases of plants. Most plant diseases are caused by fungi, bacteria, and viruses. Although the term disease is usually used only for the destruction of live plants, the action of dry rot and the rotting of harvested crops in storage or transport is similar
..... Click the link for more information. ; elm elm, common name for the Ulmaceae, a family of trees and shrubs chiefly of the Northern Hemisphere. Elm trees (genus Ulmus) have a limited use as hardwoods for timber, especially the rock or cork elm (U. thomasi).
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Dutch elm disease

Widespread disease that kills elms, caused by the fungus Ceratocystis ulmi. It was first identified in the U.S. in 1930, and an eradication campaign could not stop its spread into regions wherever the very susceptible American elm (Ulmus americana) grew. The leaves on one or more branches of a stricken tree suddenly wilt, turn dull green to yellow or brown, curl, and may drop early. Because symptoms are easily confused with other diseases, positive diagnosis is possible only through laboratory culturing. The fungus can spread up to 50 ft (15 m) from diseased to healthy trees by natural root grafts. Overland, the fungus normally is spread by the European elm bark beetle (Scolytus multistriatus; see bark beetle), less commonly by the American elm bark beetle (Hylurgopinus rufipes). Control involves exclusion of the beetles, usually by use of an insecticidal spray applied to the tree.

Dutch elm disease [¦dəch ′elm di‚zēz]

(plant pathology)

A lethal fungus disease of elm trees caused byGraphium ulmi,which releases a toxic substance that destroys vascular tissue; transmitted by a bark beetle.

Dutch elm disease (redirected from Ophiostoma ulmi)

Dutch elm disease

Dutch elm disease
(redirected from Ophiostoma ulmi)