elm bark beetle

noun
1.
Also called smaller European elm bark beetle. a shiny, dark reddish-brown bark beetle, Scolytus multistriatus, originating in Europe and now widespread in the U.S.: the primary vector of Dutch elm disease.
2.
Also called native elm bark beetle. a bark beetle, Hylurgopinus opaculus, of eastern North America, that also transmits Dutch elm disease.

Origin:
1905–10

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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The elm bark beetle feeds on trees and transports the fungus from tree to tree.
Dutch elm disease is a lethal fungal disease of elm trees which spread is by the elm bark beetle.
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